Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Morphology" wg kryterium: Temat


Tytuł:
Hybridization results using the hybrid Abies cilicica × Abies cephalonica
Wyniki hybrydyzacji przy użyciu hybrydy Abies cilicica Abies × cephalonica
Autorzy:
Kobliha, J.
Škorpik, P.
Stejskal, J.
Češka, P.
Powiązania:
https://bibliotekanauki.pl/articles/11542972.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
hybridization
hybrid
Abies cilicica x Abies cephalonica
needle
morphology
plant morphology
interspecific hybridization
Opis:
Abies fraseri (FF) is a North American conifer which is crucial for growers of Christmas trees. This species suffers 100% mortality after infection of root rot caused by Phytophthora cinnamomi. The hybrid material A. cilicica × A. cephalonica (CZ) and A. koreana × (A. cilicica × A. cephalonica) was utilized as mother trees for applications of Abies fraseri pollen. In addition to resistance to fungal disease, a long-term monitoring of growth of young seedlings along with the impact of artificial crossing on morphology of the progeny is covered. Except for increased resistance, some offspring has also exhibited a remarkable heterosis effect at younger age and different growth habit and different shape of their needles. All this may offer in the future a wide range of applications, both for crops under strong anthropogenic pressure with changing climatic conditions and for crops grown for production of Christmas trees and outstanding ornamental cultivars. Annual crossing success was determined in present study using X-ray imaging. The most successful combinations in 2012 were those of CZ1 × FF25 and CZ1 × FF76 with 7% of full seeds, followed by CZ2 × FF25 with 6% and CZ2 × FF31 with 4% of the full seeds. The evaluation of young seedlings from control crossing in 2007 highlighted significant accented height growth of complicated hybrid (A. koreana × (A. cilicica × A. cephalonica)) × FF PC. Morphology of needles showed variability in their length as compared with the needle width which was found to be less appropriate characteristic for distinguishing between different combinations.
Abies fraseri (FF) jest północno-amerykańskim iglakiem ważnym z punktu widzenia hodowców choinek świątecznych. Gatunek ten wykazuje 100% śmiertelność po porażeniu zgorzelą korzenia spowodowaną przez Phytophthora cinnamomi. Materiał hybrydowy A. cilicica × A. cephalonica (CZ) oraz A. koreana × (A. cilicica × A. cephalonica) został wykorzystany jako drzewa matczyne do aplikacji pyłku Abies fraseri. Poza odpornością na chorobę od grzybową, badania dotyczyły długoterminowego monitorowania wzrostu młodych siewek oraz wpływu sztucznego krzyżowania na morfologię potomstwa. Oprócz zwiększonej odporności, niektóre młode rośliny wykazały znaczny efekt heterozy, różny wzrost i różny kształt igieł. Wszystko to może w przyszłości dać wiele różnorodnych zastosowań, zarówno w przypadku roślin pod silną presją antropogeniczną przy zmiennych warunkach klimatycznych jak i dla roślin hodowanych do produkcji choinek świątecznych oraz na wybitne odmiany ozdobne. Powodzenie corocznego krzyżowania określono w niniejszym badaniu pryz użyciu promieniowania rentgenowskiego. Najbardziej udanymi kombinacjami w 2012 r. były CZ1 × FF25 i CZ1 × FF76 z 7% pełnych nasion, a następnie CZ2 × FF25 z 6% i CZ2 × FF31 z 4% pełnych nasion. Ocena młodych sadzonek pochodzących z kontrolnego krzyżowania w 2007 r. wskazała na istotnie zaznaczony wzrost złożonej hybrydy (A. koreana × (A. cilicica × A. cephalonica)) × FF PC. Morfologia igieł wykazała różnorodność ich długości w porównaniu z szerokością igieł, która była mniej istotną cechą do odróżnienia kombinacji.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2014, 13, 4; 23-31
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The biology of flowering of winter aconite (Eranthis hyemalis (L.) Salisb.)
Biologia kwitnienia rannika zimowego (Eranthis hyemalis (L.) Salisb.)
Autorzy:
Rysiak, K.
Zuraw, b.
Powiązania:
https://bibliotekanauki.pl/articles/28378.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
winter aconite
Eranthis hyemalis
dynamics
flowering
nectar
pollen
Ranunculaceae
biology
plant morphology
flower morphology
Opis:
Eranthis hyemalis belongs to the Ranunculaceae family whose representatives enrich early spring pollen flow and nectar for pollinating insects. Flowering biology and morphological characteristics flowers of winter aconite were studied. The forage value was estimated as the rate of nectar production. Observations were carried out between 2008 and 2011 in the Botanical Garden of the Maria Curie-Skłodowska University located in the Lublin area. In the conditions of Lublin, flowering of winter aconite plants started at the beginning of February and lasted until the end of March. The seasonal bloom dynamics was strongly affected by maximum temperatures, which intensified flower blooming, and snowfalls which hampered this process. During the day, flowers opened between 8.00 am and 3.00 pm, but the highest intensity was between 10.00 am and 12.00 am. The process of pollen release, with the average number of 29 stamens shedding pollen in the flowers, lasted from 2 to 3 days. During the day the largest number of anthers opened at noon hours, between 11.00 am and 1.00 pm, though a certain rise in this number was also observed in the morning hours between 8.00 and 9.00 am. Eranthis hyemalis flowers develop funnel-shaped nectaries, on average 3-6 per flower. The determined amount of nectar per flower was 1.23 mg, while the concentration of sugars in it averaged 72.11%. The weight of nectar sugar per flower was 0.88 mg.
Eranthis hyemalis należy do rodziny Ranunculaceae, której przedstawiciele wzbogacają wczesnowiosenny pożytek pyłkowy i nektarowy dla owadów zapylających. Celem pracy było poznanie biologii kwitnienia i cech morfologicznych kwiatów rannika zimowego oraz wartości pożytkowej wyrażonej obfitością nektarowania. Obserwacje prowadzono w latach 2008-2011 na terenie Ogrodu Botanicznego UMCS w Lublinie. W warunkach Lublina kwitnienie roślin trwało od początku lutego do końca marca. Na sezonową dynamikę rozkwitania decydujący wpływ miały temperatury maksymalne, które intensyfikowały rozkwitanie kwiatów, ale również opady śniegu, które całkowicie hamowały ten proces. W ciągu dnia kwiaty rozkwitały od godziny 8.00 do 15.00 z największym nasileniem w godzinach 10.00-12.00. Proces pylenia pręcików w liczbie średnio 29 w kwiecie trwał od 2 do 3 dni. W ciągu dnia najwięcej pylników otwierało się w godzinach południowych 11.00-13.00, choć zauważono również pewną zwyżkę w godzinach porannych 8.00- 9.00. Kwiaty rannika wykształcają lejkowatego kształtu listki miodnikowe w liczbie od 3 do 6. Oznaczona ilość nektaru z 1 kwiatu wynosiła 1,23 mg, a koncentracja cukrów w nim zawartych średnio 72,11%. Masa cukrów oznaczonych z 1 kwiatu wynosiła 0,88 mg.
Źródło:
Acta Agrobotanica; 2011, 64, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological characteristics of Vaccinium xintermedium Ruthe
Autorzy:
Ponikierska, A
Gugnacka-Fiedor, W.
Piwczynski, M.
Powiązania:
https://bibliotekanauki.pl/articles/41287.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Vaccinium myrtillus
Vaccinium vitis-idaea
hybrid
Vaccinium x intermedium
plant morphology
Polish population
hybridization
leaf
flower
morphology
taxonomy
Opis:
Vaccinium ×intermedium Ruthe, the hybrid of V. myrtillus and V. vitis-idaea, by contrast with the parental species is very rare plant and has a discontinuous geographical range in north-western Europe. This paper describes the morphology of V. ×intermedium from Polish populations occurring in part of Pomeranian Lakeland in comparison with both parent species. The results presented here confirm the suggestions of earlier research that V. ×intermedium displays intermediate characteristics of leaf and floral morphology concordant with hybrid status. Also, is discussed the problem of the isolating mechanisms between parent species and hybrid's ecology.
Źródło:
Dendrobiology; 2004, 51; 59-65
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological Effects of Stymjod Foliar Application on Medicago × varia T. Martyn
Autorzy:
Sosnowski, Jacek
Toczyska, Ewelina
Truba, Milena
Powiązania:
https://bibliotekanauki.pl/articles/123375.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
iodine
alfalfa
plant morphology
stem
leaves
mass of plants
Opis:
The aim of the study was to investigate how the foliar application of iodine, as well as its concentration in the working liquid, influence the growth of fresh and dry weight of plants, stems, leaves, roots and number of shoots and leaf laminae of sand Lucerne. The experiment was carried out in vases. The three plants that developed the largest number of leaves in the vase were left. The experimental factors as the plant growth regulator with the trade name Stymjod in three concentrations of 1.5%, 3% and 4.5% in the working liquid were introduced; the control involved distilled water. Two plant applications were performed. The first one in 6 appropriate leaf phase and the second in the branching formation phase. A single dose of the working liquid was 50 ml per vase. This dose of liquid caused the complete sprinkling of plants in a vase. The obtained results were statistically analyzed by means of analysis of variance. The experiment showed that the concentration of Stymjod in the working liquid is very important. It is difficult to say which concentrations gave the best results in cultivating sand lucerne. The present studies demonstrated that Stymjod applied foliarly at 4.5% concentration significantly affected the growth of stems and leaf blades. Additionally, 1.5% concentration increased the weight of fresh matter and dry matter of roots. The experiment showed that the effects of Stymjod application to hybrid alfalfa depended on its dose. It is difficult, however, to clearly state which concentration produced the best results so further research in this area is needed.
Źródło:
Journal of Ecological Engineering; 2019, 20, 8; 184-191
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of leaf morphology from generative and vegetative shoots of Rubus capitulatus and R. kuleszae (Corylifolii section, Rosaceae)
Autorzy:
Kluza-Wieloch, M.
Maciejewska-Rutkowska, I.
Gawron-Gzella, A.
Dudek-Makuch, M.
Drapikowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/878484.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
leaf morphology
plant morphology
variability
generative shoot
vegetative shoot
Rubus capitulatus
Rubus kuleszae
Corylifolii section
Rosaceae
bramble
leaf
statistical method
Opis:
Leaves from generative and vegetative shoots of Rubus capitulatus and R. kuleszae of Corylifolii section were investigated. The study was to demonstrate the variability of leaves of both types of shoots, and at the same time an examination on the contents of polyphenols and phenolic acids in their blades carried out. Selected blade traits, such as was: length, width, elongation, perimeter, dissection index, area, rectangularity and circularity were measured using computer program and statistically analysed. Additionally, fresh and dry leaves were weighed and the percentage of preserved mass of particular samples was calculated. A statistical analysis revealed the area to be the most variable feature in both species and both types of shoots. Leaves from vegetative shoots were the most similar to each other and the length, width, perimeter and area were the most strongly correlated traits to each other. The leaves of generative shoots of both species contained less water than the leaves of vegetative ones.
Źródło:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana; 2013, 17
1896-1908
Pojawia się w:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pharmacognostic studies on root of Stachytarpheta jamaicensis
Autorzy:
Sivaranjani, R.
Ramakrishnan, K.
Bhuvaneswari, G.
Powiązania:
https://bibliotekanauki.pl/articles/11911.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
pharmacognosy
root
Stachytarpheta jamaicensis
plant morphology
Verbenaceae
medicinal use
Opis:
The present study reveals the pharmacognostic studies root of Stachytarpheta jamaicensis (L) Vahl. The objectives of the present work comprises of collection, identification, macroscopical, Ph of aqueous solution, soluble ash, alcohol soluble extractive, flouresence analysis of root. The root section was taken and microscopical studies were carried out, the root shows derived from the cork, the periderm tissue is formed, which replaces the epidermis in the outer layer. The next tissue identified inwards was the cortex. Sclerenchyma was seen as a ring in the roots, while as a group, formed from a group of cells, in the mature ones. In the middle, xylem tissue occupies a large area, just below the phloem tissue.
Źródło:
International Letters of Natural Sciences; 2014, 08, 2
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of environmental changes on physiology and development of polar vascular plant
Autorzy:
Gielwanowska, I.
Pastorczyk, M.
Kellmann-Sopyla, W.
Powiązania:
https://bibliotekanauki.pl/articles/11964.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
environment change
plant physiology
plant development
polar plant
vascular plant
Caryophyllaceae
Poaceae
morphology
plant morphology
ultrastructure
organelle
stress reaction
seed development
Arctic
Antarctic
Opis:
Polar vascular plants native to the Arctic and the Antarctic geobotanical zone have been growing and reproducing effectively under difficult environmental conditions, colonizing frozen ground areas formerly covered by ice. Our macroscopic observations and microscopic studies conducted by means of a light microscope (LM) and transmission electron microscope (TEM) concerning the anatomical and ultrastructural observations of vegetative and generative tissue in Cerastium arcticum, Colobanthus quitensis, Silene involucrata, plants from Caryophyllaceae and Deschampsia antarctica, Poa annua and Poa arctica, from Poaceae family. In the studies, special attention was paid to plants coming from diversity habitats where stress factors operated with clearly different intensity. In all examinations plants, differences in anatomy were considerable. In Deschampsia antarctica the adaxial epidermis of hairgrass leaves from a humid microhabitat, bulliform cells differentiated. Mesophyll was composed of cells of irregular shapes and resembled aerenchyma. The ultrastructural observations of mesophyll in all plants showed tight adherence of chloroplasts, mitochondria and peroxisomes, surface deformations of these organelles and formation of characteristic outgrowths and pocket concavities filled with cytoplasm with vesicles and organelles by chloroplasts. In reproduction biology of examined Caryophyllaceae and Poaceae plants growing in natural conditions, in the Arctic and in the Antarctic, and in a greenhouse in Olsztyn showed that this plant develops two types of bisexual flowers. Almost all ovules developed and formed seeds with a completely differentiated embryo both under natural conditions in the Arctic and the Antarctic and in a greenhouse in Olsztyn.
Źródło:
Papers on Global Change; 2011, 18
2300-8121
1730-802X
Pojawia się w:
Papers on Global Change
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological variability of leaves of Sorbus torminalis [L.] Crantz in Poland
Autorzy:
Bednorz, L
Powiązania:
https://bibliotekanauki.pl/articles/56763.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
morphological variability
leaf
Sorbus torminalis
plant morphology
statistical analysis
Polska
Opis:
This paper presents the results of the study on morphological variability of leaves of a scattered tree species Sorbus torminalis (L.) Crantz) in Poland. The leaves from short- and long shoots were collected from 17 localities widespread within the range of the species in Poland. Leaves were measured according to 15 morphological traits. The biometric data were subjected to multivariate statistical analysis in attempt to define variability between local populations. Most of the leaf traits are significantly correlated and are characterised by moderate level of variation. The average among population component of variation was 32.82% and 27.46% for leaves on short- and long shoots, respectively. The differences between sampled populations are significant, but only a weak geographical pattern of this differentiation was detected. Clinal type of variation was ascertained in two traits. Leaf traits which discriminate best the studied populations are also indicated. It was proved that leaves on short shoots differ markedly in shape and size from those of long shoots. Leaves on long shoots are steadier, but morphological trait values are less correlated. The study also confirmed the occurrence of individuals with leaves characteristic for S. torminalis var. perincisa Borbas et Feck and S. torminalis f. mollis Beck in a few Polish populations.
Źródło:
Acta Societatis Botanicorum Poloniae; 2006, 75, 3; 233-243
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological studies on flowering plants (Solanaceae)
Autorzy:
Jagatheeswari, D.
Powiązania:
https://bibliotekanauki.pl/articles/11416.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
plant morphology
flowering plant
plant
Solanaceae
medicinal plant
food plant
Opis:
In the present study, the morphological features of 20 taxa of the family Solanaceae were studied. The Solanaceae, or nightshades, are an economically important family of flowering plants. The family ranges from herbs to trees, and includes a number of important agricultural crops, medicinal plants, spices, weeds, and ornamentals. Many members of the family contain potent alkaloids, and some are highly toxic, but many cultures eat nightshades, in some cases as staple foods. The present observation shows that majority of Solanaceae members almost the same morphological features that of the family.
Źródło:
International Letters of Natural Sciences; 2014, 10
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure of Kalanchoe pumila Bak. leaves (Crassulaceae DC.)
Struktura liści Kalanchoe pumila Bak. (Crassulaceae DC.)
Autorzy:
Chernetskyy, M.
Weryszko-Chmielewska, E.
Powiązania:
https://bibliotekanauki.pl/articles/27963.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
leaf structure
Kalanchoe pumila
leaf
Crassulaceae
plant morphology
plant anatomy
ultrastructure
Opis:
The structure of Kalanchoё pumila Bak. was studied with the use of stereoscopic, light, scanning and transmission electron microscopy. It was found that the chlorenchymatic tissue was divided into subepidermal small-celled mesophyll and large-celled (water transporting, CAM type) mesophyll, placed in the central part of the leaf. The mesophyll structure and its cell ultrastructure indicate C3 photosynthesis in this taxon, whereas CAM photosynthesis, being an adaptive syndrome, is induced by external factors. Three groups of xeromorphic traits were observed in the structure of K. pumila leaves, related to: 1) storing water in the ground and epidermal tissues, 2) decreased transpiration (the closing of stomata during heat), 3) avoiding excess insolation of the mesophyll and overheating of the leaf (striated cuticula, anthocyan pigments, tannin storage). The last two groups of xeromorphic traits also include thickening of the outer walls of cuticular cells, a thick-layered cuticula, and the presence of epicuticular wax and calcium carbonate deposits. Microchannels which enhance transpiration effi ciency in developing K. pumila leaves were found in the vicinity of anticlinal walls in the outer walls of epidermal cells. Calcium deposits produced on the leaf surfaces protect them in extreme conditions. Adaptive traits in the structure of K. pumila leaves are conservative and they confi rm the relations between this taxon and the conditions in their native land.
Przy zastosowaniu mikroskopii stereoskopowej, świetlnej oraz skaningowej i transmisyjnej elektronowej badano strukturę liści Kalanchoё pumila Bak. Stwierdzono, że tkanka chlorenchymatyczna w liściach jest podzielona na mezofi l drobnokomórkowy subepidermalny oraz mezofi l wielkokomórkowy (wodonośny, typu CAM) położony w środkowej części liścia. Budowa mezofi lu i ultrastruktura jego komórek wskazuje na C3 typ fotosyntezy u tego taksonu, a fotosynteza typu CAM, jako syndrom przystosowawczy, indukowana jest czynnikami zewnętrznymi. W strukturze liści K. pumila zaobserwowano trzy grupy cech kseromorfi cznych związanych z: 1) magazynowaniem wody w tkance miękiszowej i epidermalnej, 2) obniżeniem transpiracji (zamknięcie aparatów szparkowych w czasie upału), 3) ze zmniejszeniem nasłonecznienia mezofi lu i przegrzewania liścia (prążkowana kutykula, występowanie barwników antocyjanowych, gromadzenie substancji garbnikowych). Dwie ostatnie grupy cech kseromorfi cznych obejmują ponadto: zgrubienie zewnętrznej ściany komórek skórki, grubowarstwową kutykulę, występowanie wosku epikutykularnego oraz złogów węglanu wapnia. W sąsiedztwie ścian antyklinalnych w zewnętrznych ścianach komórek epidermy wykazano obecność mikrokanalików, które niewątpliwie zwiększają zdolność wyparowania wody w rozwijających się liściach roślin K. pumila w czasie wegetacji. Jednakże wyprodukowane na powierzchni liści osady wapienne chronią te organy w warunkach ekstremalnych. Cechy adaptacyjne występujące w strukturze liści K. pumila są konserwatywne i potwierdzają związek tego taksonu z warunkami występowania w ojczyźnie.
Źródło:
Acta Agrobotanica; 2008, 61, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative leaf morphology and anatomy of some neotropical Philodendron Schott (Araceae) species
Autorzy:
Klimko, M.
Wawrzynska, M.
Wiland-Szymanska, J.
Powiązania:
https://bibliotekanauki.pl/articles/790571.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
plant species
leaf
plant morphology
plant anatomy
neotropical species
Philodendron
Araceae
Opis:
A comparative morphological and anatomical study on the petioles and lamina of 22 taxa (species, subspecies and cultivars) of the genus Philodendron (subgenera Meconostigma, Pteromischum and Philodendron) has been made in order to investigate interspecific differences which may be useful in species identification. All species have bifacial leaves with petioles, amphistomatic with a strongly reduced density of stomata on the adaxial leaf surface. The species differ in the size and shape of their epidermal cells, the distribution and types of stomata and cuticle ornamentation in the lamina, thickness of epicuticular layer, presence or absence of hypodermis, structure of spongy mesophyll, thickness of palisade and spongy mesophyll layers, as well as types of raphides, and in the structure and forms of petioles. A combination of these characters may be useful in species identification. This study shows that there is some variation in petiole and leaf morphological and anatomical characters among the 22 taxa of Philodendron. However, many characters are present in all of them and may be typical of the genus. The study revealed several detailed interesting epidermal and anatomical features that have not previously been reported in the genus.
Źródło:
Steciana; 2014, 18, 3
1689-653X
Pojawia się w:
Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Various scenarios of the cell pattern formation in Arabidopsis lateral root
Autorzy:
Bialek, J.
Potocka, I.
Szymanowska-Pulka, J.M.
Powiązania:
https://bibliotekanauki.pl/articles/58191.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
cell formation
lateral root
formation
Arabidopsis
cell division
plant organ
plant morphology
Opis:
During lateral root (LR) development a coordinate sequence of cell divisions, accompanied by a change of the organ form takes place. Both the order of anatomical events and morphological features may vary for individual primordia. At early stages of LR primordia development oblique division walls are inserted in cells that are symmetrically located on both sides of the axis of the developing LR primordium, and thereby allow for the protrusion of the LR. We hypothesize that both oblique cell wall insertion and continuous changes in primordium form could be a consequence of a local change in stress distribution in the region of the LR initiation.
Źródło:
Acta Societatis Botanicorum Poloniae; 2014, 83, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The biology of flowering and structure of selected elements of Cornus alba L. flowers
Biologia kwitnienia i struktura wybranych elementów kwiatów Cornus alba L.
Autorzy:
Konarska, A.
Powiązania:
https://bibliotekanauki.pl/articles/27640.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
flowering
flower microstructure
Cornus alba
Cornaceae
flower
trichome
papilla
stoma
plant morphology
Opis:
The biology of flowering and the micromorphology of Cornus alba flowers were studied using light and scanning electron microscopy. The flowering of white dogwood in 2008 lasted 35 days, and the lifespan of a single flower was 3 days. The number of flowers per inflorescence was variable (on the average, it was 89). The largest group of insects visiting the flowers of C. alba comprised Hymenoptera (mainly bees and andrenids), then ants, dipterans and beetles. They foraged the dogwood flowers most intensively between 11.00 and 15.00. The inconspicuous four-petalled flowers of C. alba were characterised by the occurrence of T-shaped, two-armed non-glandular trichomes covering the receptacle as well as observed on the petals of the corolla, the style of the pistil and the anthers in a smaller number. The trichomes were covered by a thick cuticle with characteristic outgrowths. They contained a living protoplast, and plastids were observed in the cytoplasm of the trichome cells. In addition, anomocytic stomata were found in the epidermis of the receptacle and in the epidermis of the corolla petals. The stigma of the pistil and the adaxial epidermis of the petals were composed of very numerous conical papillae.
Badano biologię kwitnienia oraz mikromorfologię kwiatów Cornus alba przy zastosowaniu mikroskopii świetlnej oraz skaningowej elektronowej. Kwitnienie derenia białego w roku 2008 trwało 35 dni, a długość życia pojedynczego kwiatu wyniosła 3 dni. Liczba kwiatów w kwiatostanie była zmienna (średnio wynosiła 89). Najliczniejszą grupą owadów odwiedzających kwiaty C. alba były błonkówki (pszczoły i pszczolinki), następnie mrówki, muchówki i chrząszcze. Oblatywały one kwiaty derenia najintensywniej między godzinami 10.00 a 15.00. Niepozorne, czterokrotne kwiaty C. alba charakteryzowały się występowaniem T-kształtnych, dwuramiennych, mechanicznych włosków pokrywających dno kwiatowe, a także w mniejszej liczbie obserwowanych na płatkach korony, szyjce słupka oraz pylnikach. Włoski pokryte były grubą kutykulą z charakterystycznymi wyrostkami. Zawierały żywy protoplast, a w cytoplazmie komórek włosków obserwowano plastydy. W epidermie dna kwiatowego i abaksialnej epidermie płatków korony występowały ponadto anomocytyczne aparaty szparkowe. Znamię słupka, jak i adaksialną epidermę płatków korony budowały bardzo liczne stożkowate brodawki (papille).
Źródło:
Acta Agrobotanica; 2009, 62, 1
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ecological adaptations of the floral structures of Galanthus nivalis L.
Przystosowania ekologiczne struktur kwiatowych Galanthus nivalis L.
Autorzy:
Weryszko-Chmielewska, E.
Chwil, M.
Powiązania:
https://bibliotekanauki.pl/articles/28462.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
ecological adaptation
plant morphology
micromorphology
Galanthus nivalis
flower
plant anatomy
osmophore
tepal
Opis:
The structure of the flowers of Galanthus nivalis shows adaptations to early spring flowering conditions as well as adaptations to entomogamy. The tepals produce colour marks and odorous substances. The aim of the present study was to determine the micromorphology and anatomy of tepals, in particular in the regions comprising colour marks which, in accordance with the literature data, emit essential oils. Examination was performed using light, fluorescence, and scanning electron microscopy. Large protrusions, corresponding to the location of the green stripes, were found to occur on the adaxial surface of the inner tepals. The epidermal cells in this part of the tepals produce a cuticle with characteristic ornamentation as well as numerous stomata with well-developed outer cuticular ledges. The wide opening of many stomata is evidence of high activity in this area. The fluorescence microscopy images confirm the high activity of the epidermis (scent emission), on both sides of the tepals, as well as of the chloroplast- containing mesophyll. In the abaxial epidermis, there were observed different-sized papillae that also participated in essential oil secretion. The polarization of the epidermal cell protoplasts, large cell nuclei, and the presence of large vacuoles with heterogeneous contents in the peripheral part of the cells correspond to the structural features of the tissues emitting odorous compounds in flowers – osmophores. In freshly opened flowers, the mesophyll of the central part of the perianth segments was composed of several cell layers, whereas in older flowers large air ducts formed, which are adaptations to environmental thermal conditions.
Źródło:
Acta Agrobotanica; 2010, 63, 2
0065-0951
2300-357X
Pojawia się w:
Acta Agrobotanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tree architecture description using a single-image photogrammetric method
Autorzy:
Gazda, Anna
Kędra, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/956834.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
stand structure
biometry
non-destructive method
plant morphology
above-ground biomass
fagus sylvatica l
Opis:
Tree architecture is thought to allow species to share available resources both above and below ground. The description of plant architecture is useful to model plant structure and function, as well as interactions with other species or generally with the environment. The aim of this study was to present a conceptual implementation of a simple photogrammetric method for the above-ground tree architecture description of leafless individuals growing under different conditions. The implemented method was single- image photogrammetry. The novel aspect is the heuristic assumption that tree’s image is a projection onto a plane that cross-sections the stem base; which enables assessment of a set of the canopy attributes, with only one image involved. The method was tested in two ways: (1) in the field: in terms of its applicability to real trees, we used 31 plots with different terrain slope and tree density, in natural forest, in every case the target tree was European beech (Fagus sylvatica L.) which is known as a very plastic tree species, and (2) with virtual tree-like 3D models, created with L-system rules, to determine the accuracy of the method. Some of the traits measured or estimated with respect to the projection plane α are: the length of the trunk and branches (L), inclination of the tree main axis from the vertical (IA), crown width (CW), two opposite crown radius (CR), crown length (CL); and the external factors, like the terrain slope inclination (S) and number of trees competing for light (N). The advantages (e.g., low time consumption and low cost), difficulties (e.g., occlusion of tree tops) and accuracy in idealised conditions were described. The tree traits that can be measured using the proposed method are essential for estimating many ecological parameters. Our method allows reducing fieldwork time to a minimum and taking measurements of large numbers of plots daily when the environmental conditions are similar, even when they are taken by only one person. This method is very useful for conducting studies on a temporal scale (e.g., to record changes in the branching structure). Future research is needed to validate the method in different environments.
Źródło:
Dendrobiology; 2017, 78; 124-135
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies