Temat: plant condition - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Responses in young Quercus petraea: coppices and standards under favourable and drought conditions
Autorzy:: Stojanovic, M.
Cater, M.
Pokorny, R.
Powiązania:: https://bibliotekanauki.pl/articles/41121.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: plant response
young plant
Quercus petraea
sessile oak
durmast oak zob.sessile oak
coppice
standard
favourable condition
drought condition
drought response
light condition
Opis:: Assimilation and photosynthetic efficiency (maximal quantum yield) of young oaks were compared in coppice and standard sessile oak stands of comparable age (100 years) under different light intensity categories: under minimum light – ISF < 20%, low light – 20%30% during favourable and drought conditions. Measurements of maximal assimilation rates were performed at a constant temperature of the measurement block (20°C), a CO2 concentration of 400 μmol/l, flow 500 μmol/s and different light intensities: 0, 50, 250, 600, 1200 and 1800 μmol/m2s during three consecutive growing seasons (2012, 2013 and 2014). In every category at least 8 young naturally regenerated seedlings and sprouts of different coppice stools were measured. The quantum yield in optimal conditions in standards was highest in the category of closed canopy, while in coppices in medium light category. During severe drought in 2013 the drop in efficiency of standards was evident in all categories, while in coppices no differences in efficiency were observed between favourable 2012 and 2013 with expressed drought stress, proving the advantage of young coppices over standards in this particular light category. However, the beneficial effects of restoration coppicing are not guaranteed. It is our belief that in time such advantage might decrease; it would be therefore interesting to compare responses in time and define, when response abilities of both studied systems become equal.
Źródło:: Dendrobiology; 2016, 76
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Chorology of Juniperus thurifera (Cupressaceae) in Morocco
Autorzy:: Romo, A
Boratynski, A.
Powiązania:: https://bibliotekanauki.pl/articles/41020.pdf
Data publikacji:: 2005
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: Morocco
plant geography
plant ecology
Juniperus thurifera ssp.africana
geographic distribution
occurrence condition
wood exploitation
Opis:: The geographic distribution and occurrence conditions of Juniperus thurifera subsp. africana in Morocco were studied. The literature and herbaria data, together with field observations formed the basis of detailed maps of distribution of the species in the Middle and High Atlas and allow us to analyze its vertical distribution. The taxon occurs in the sub-arid and arid zones of the Middle and High Atlas with a separate population in the Anti-Atlas, mostly between altitudes 2000 and 2700 m, with an altitudinal maximum at 3400 m and a minimum at 1700 m. It forms forests in the area of about 30 000 ha. In many places of the High Atlas it is the only wood source for local populations. It is strongly endangered because of over exploitation of the wood, over pasturing and lack of seedlings and young specimens.
Źródło:: Dendrobiology; 2005, 54; 41-50
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Genetic reactivity of Norway spruce Picea abies (L.) Karst. to soil fertility
Autorzy:: Fober, H
Powiązania:: https://bibliotekanauki.pl/articles/41140.pdf
Data publikacji:: 2004
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: climate condition
mineral nutrition
plant growth
plant productivity
environment condition
Norway spruce
Picea abies
genetic reactivity
soil fertility
half-sib family
genotype
nutrition level
provenance
Opis:: Seedlings of various provenances and progenies were greenhouse grown in sand cultures with different levels of nitrogen, phosphorus, potassium, calcium and magnesium. The first experiment tested 20 provenances and the next studied 45–50 half-sib families of 9–10 provenances to establish the interaction between Picea abies genotypes and nutrition levels. Spruces of various origins differed in their nutrient requirements. In particular, seedlings from Wisła and Istebna grew better at smaller phosphorus levels. The genotype × environment interactions were significant for numerous traits when seedlings were grown at different levels of nitrogen, phosphorus and calcium, and for a few traits for potassium. The proportion of variance explained by interaction was small. Generally, the interactions were significant for a greater number of traits at progeny level than at provenance level. The results suggest that it is possible to select genotypes which are suitable for specific site conditions and genotypes which are stable over a wide range of nutrition levels.
Źródło:: Dendrobiology; 2004, 51 Supplement
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: In vitro responses of various explants of Fagus sylvatica
Autorzy:: Hazubska-Przybyl, T.
Chmielarz, P.
Bojarczuk, K.
Powiązania:: https://bibliotekanauki.pl/articles/41768.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: European beech
plant response
explant
Fagus sylvatica
micropropagation
culture condition
tissue culture
in vitro culture
Opis:: There are limited published data on in vitro reproduction of Fagus sylvatica L. (European beech). This study was aimed to determine the efficiency of induction of somatic embryogenesis or organogenesis of beech from different types of explants in various culture conditions. Explants derived from immature, fresh seeds (collected in 2011 and 2013) and from mature seeds, stored at –10ºC and some stratified at 3ºC, were placed on induction media with various combinations of plant growth regulators: zeatin, 2,4-dichlorophenoxyacetic acid (2,4-D) and/or benzyladenine (BA). Initial cultures were kept in darkness or weak light (white fluorescent or blue-red LED). Limited success has been achieved in initiation of somatic embryogenesis. We obtained friable, yellow-white callus with characteristic PEM-like structures (cPEM-ls, from embryonic axes or fragments of immature embryos with embryonic axes), which may be an early developmental stage of embryogenic callus of Fagus sylvatica. This type of callus regenerated from explants incubated in darkness, mainly on WPM medium with addition of 6.8 μM zeatin or WPM and MSG media with 9.1 μM 2,4-D and 2.2 μM BA. The highest frequency of regeneration of callus with cPEM-ls was 5%. Instead, we succeeded to induce organogenesis from both immature and mature zygotic embryos and from embryonic axes. The best results were obtained for mature zygotic embryos incubated on ½WPM medium (half-strength Woody Plant Medium) with 9.1 μM 2,4-D and 2.2 μM BA. Adventitious buds were regenerated on up to 15% of the explants. The induced buds developed into shoots, enabling us to establish tissue cultures of beech. Induction of organogenesis from the tested explants was more efficient than induction of somatic embryogenesis.
Źródło:: Dendrobiology; 2015, 73
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Seasonal variations of oscillation and vibration parameters of Acer platanoides
Autorzy:: Netsvetov, M.
Nikulina, V.
Powiązania:: https://bibliotekanauki.pl/articles/41129.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: seasonal variation
oscillation
vibration
maple
swaying
Acer platanoides
plant property
mechanical property
growth condition
Opis:: This article describes an investigation into the seasonal variations of frequency, damping ratio and amplitude of swaying and vibration of Norway maple Acer platanoides L. The study was carried through a series of pull andrelease experiments in situ andon branches in the laboratory using an artificial air flow. It was foundthat foliatedtrees hada natural sway frequency that was on average 1.6±0.2 times greater than in the out-of-leaf state. In contrast, the damping ratio of maple increased by 1.5±0.3 times in the summer period. The stem swaying initiatedvibrations, i.e. elastic wave, in the roots with frequencies in the range of 45–50 Hz. Laboratory tests showed that the vibration amplitude of branches depended linearly on leaf mass for an air flow velocity of 1.94 m/s.
Źródło:: Dendrobiology; 2010, 64
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Mycorrhizal status of Scots pine Pinus sylvestris L. seedlings grown in watered and non-watered nursery condition
Autorzy:: Hilszczanska, D
Powiązania:: https://bibliotekanauki.pl/articles/41009.pdf
Data publikacji:: 2004
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: Scots pine zob.Scotch pine
Scotch pine
Pinus sylvestris
mycorrhizal status
watering effect
plant growth
plant development
tree
soil water potential
moisture condition
Opis:: This study describes the effect of watering on the mycorrhizal development and growth of Scots pine seedlings in a bare root nursery. Seedlings of Scots pine, grown under nursery conditions on natural soil (loamy sand) and soil + litter, were subjected to two different watering regimes for five months. During this time, measurements of soil water potential were made. Seedlings grown in natural soil and subjected to drought conditions were of significantly greater shoot height and volume and they had one mycorrhizal morphotype more than watered seedlings. However, irrigated seedlings subjected to excessive watering possessed greater mycorrhizal colonization: 46% on natural soil and 72% on soil + litter, while non-irrigated seedlings had 36% and 67% levels of mycorrhizal colonization, respectively.
Źródło:: Dendrobiology; 2004, 52; 23-28
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Effect of provenance on the survival of Picea abies trees on the IPTNS-IUFRO 1964-68 site in Krynica (Poland)
Autorzy:: Masternak, K
Sabor, J.
Majerczyk, K.
Powiązania:: https://bibliotekanauki.pl/articles/41185.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: international conference
Europe
forest ecosystem
plant breeding
tree
Norway spruce
Picea abies
plant survival
provenance effect
genotype
Polska
Krynica-Zdroj town
health condition
Opis:: In connection with the decline of spruce stands on the Krynica plots of IPTNS-IUFRO 1964/68, observed in the last decade and attributed to the so-called spiral disease, an attempt was made to determine whether the current health condition of trees is influenced by genotype (provenance). As shown by preliminary observations, the spruces differed in the degree of survival depending on provenance. The inventories of died or broken trees to be removed during the sanitary cutting, made in the years 2000, 2003, 2004 and 2008, yielded also information about the number of spruces that remained in the blocks of the experiment for each provenance and provenance region by Krutzsch (1968). Analysis of variance showed that genotype (provenance) has a statistically significant effect on the survival of trees. In the years 1999-2008, spruces from region 21 (Bohemian Forest) displayed the poorest survival rate in the conditions of the Beskid Sądecki Mts., while those from region 80 (Eastern Siberia) survived best.
Źródło:: Dendrobiology; 2009, 61 Supplement
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The yew (Taxus baccata L.) population in Knyazhdvir Nature Reserve in the Carpathians (Ukraine)
Autorzy:: Boratynski, A.
Didukh, Y.
Lucak, M.
Powiązania:: https://bibliotekanauki.pl/articles/41551.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: Ukraine
occurrence condition
Knyazhdvir Nature Reserve
yew
plant protection
Carpathians Mountains
Taxus baccata
standing structure
population
Opis:: The natural population of yew in the Knyazhdvir Nature Reserve was described and its status has been analyzed. It was stated that more than 22 000 specimens of yew grow there and it is the most numerous population of the species in Ukraine. The most important factor for Taxus baccata occurrence there are the presence of calcium carbonate and humidity of the soils. The height and diameter structures of the population indicate that the population is in progress. The largest specimens in 1976 were of 12 m high and of 30 cm dbh. The natural regeneration is satisfactory. The increment of height of the yew was greater in the conditions of less density of the canopy of beech-fir stand under which the species grows.
Źródło:: Dendrobiology; 2001, 46
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Dendrochronological studies of Juniperus communis dying out population in the "Jalowce" reserve (Pomerania)
Autorzy:: Cedro, A
Wrobel, M.
Jurzyk, S.
Powiązania:: https://bibliotekanauki.pl/articles/41065.pdf
Data publikacji:: 2007
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: dendrochronology
juniper
Juniperus communis
population
meteorological condition
tree ring width
Jalowce reserve
Pomeranian region
Polska
forest nature reserve
plant age
tree
Opis:: The aim of undertaken research was recognition the reasons of dying out the common juniper Juniperus communis L. ssp. communis population in the forest nature reserve “Jałowce” (Pomerania). Applied methods of dendrochronological analysis let to determine the age of juniper-stand in the reserve and describe the influence of climatic conditions on its growth. Obtained results testify to Juniperus communis chronology with signature WIE collected from 17 individual sequences which numbered 102 tree ring width and represented a time span 1903 to 2004. Such results described the juniper-stand in the reserve as ageing population with the oldest specimen at age 98 years. However, the last several years were characterised by the lack of strong growth depressions typical for earlier time periods with tree ring width ranged 0.7–1.0 mm (themean annual tree ring width amounted to 0.85 mm), but the visible symptoms of degeneration and dying out of protected common juniper population intensified probably because of its age.
Źródło:: Dendrobiology; 2007, 58; 17-23
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Influence of cutting off distal ends of Quercus robur acorns on seedling growth and their infection by the fungus Erysiphe alphitoides in different light conditions
Autorzy:: Giertych, M.J.
Suszka, J.
Powiązania:: https://bibliotekanauki.pl/articles/41420.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: oak
pedunculate oak
container nursery
oak powdery mildew
Quercus robur
seedling growth
plant infection
fungi
Erysiphe alphitoides
light condition
phenology
Opis:: Quercus robur seedlings are very often infested by oak powdery mildew caused by Erysiphe alphitoides. This disease attacks primary leaves with high insolation. In our experiment seedling growth in different light conditions was observed. Seedlings were derived from intact seeds or from seeds where the distal ends of acorns were cut off. Acorns were sown in pots at four light conditions (2%, 8% and 30% light transmittance and in full sunlight). For half of the seedlings we reduced the influence of powdery mildew by using a fungicide. Height of seedlings, shoot dry mass and the degree of damage caused by Erysiphe alphitoides were measured. The highest damages were in full light conditions and the lowest in the 30% light treatment. The influence of acorn reduction on powdery mildew infection was not significant (p=0.0763), however, in the full light conditions the seedlings from cut acorns were ca. 30% less damaged. The cutting of acorns also alters the height of seedlings and shoot mass. The tallest seedlings were from cut seeds growing in the 30% light treatment. The influence of the fungicide was lowest in the 30% light treatment where the decrease in damage was only ca. 10%. For nursery practice we can say that oak seedling production from cut off acorns under 30% light transmittance should give the best results of seedling growth even without the fungicide application.
Źródło:: Dendrobiology; 2010, 64
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Geographical differentiation of Dryas octopetala in Europe based on morphological features
Autorzy:: Marcysiak, K.
Powiązania:: https://bibliotekanauki.pl/articles/41712.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: geographic differentiation
Dryas octopetala
mountain avens
white dryas zob.mountain avens
white dryad zob.mountain avens
Arctic-alpine plant
Europe
morphological feature
biogeography
biometry
climate condition
statistical analysis
Opis:: Dryas octopetala is an important arctic alpine species, but its morphological analyses are scarce. The study deals with present European biogeographical structure based on morphology and its relations to the phylogenetic structure and the climate. Characters of leaves from 23 isolated populations were measured, statistically characterized and analyzed with the use of ANOVA and the discriminant analysis. All the features differentiated the tested samples significantly. Differences between plants representing regions were greater than between the samples within regions with regard to the four characters. The most visible division ran between the samples coming from the southern and the northern parts of the range, with the sample from the Western Scandinavia occupying the central position. Correlations between characters and climactic factors were shown, and the size of the leaf was associated mainly with the minimum temperatures of spring months, while the leaf shape with the rainfall during the summer months. Characters differentiating the regions and discriminating populations strongly were mostly dependent on the influence of the climate. The results of the present study were not fully consistent with the outcomes of the biogeographic molecular analyses of the researched species. Some parallels can be drawn when comparing the present analyses with the geographic differentiation of two other arctic-alpine shrubs Salix herbacea and S. reticulata. Although morphological diversity of Dryas octopetala showed a geographic structure, it was most probably shaped mainly by the influence of the environmental and climatic factors.
Źródło:: Dendrobiology; 2014, 72
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Effect of sunlight on phenolic compounds accumulation in coniferous plants
Autorzy:: Brzezinska, E
Kozlowska, M
Powiązania:: https://bibliotekanauki.pl/articles/41493.pdf
Data publikacji:: 2008
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: light condition
one-year-old shoot
two-year-old shoot
needle
common yew
Taxus baccata
American arborvitae
Thuja occidentalis
common juniper zob.juniper
juniper
Juniperus communis
urban garden
phenol
total phenol content
accumulation
coniferous plant
sunlight
flavone
Opis:: The effect of light conditions on the accumulation of phenolic compounds was investigated in the needles of one-year and two-year old shoots, collected from perennial specimens of common yew (Taxus baccata L.), American arborvitae (Thuja occidentalis L.) and common juniper (Juniperus communis L.), growing in an urban garden. The content of total phenols and flavones was partially related to the light requirement or light tolerance of conifer tree. In Taxus needles, a shade-loving species, higher accumulation of phenolic metabolites was observed under shaded condition (in two-year old shoots) and was linked with the growth intensity in spring. In Thuja and particularly in Juniperus, the level of phenolics was related to the insolation intensity, probably so as a part of the adaptation mechanism.
Źródło:: Dendrobiology; 2008, 59; 3-7
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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