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    Wyświetlanie 1-7 z 7
    Tytuł:
    Micromorphology and anatomy of fruits and seeds of bitter melon (Momordica charantia L., Cucurbitaceae)
    Autorzy:
    Giuliani, C.
    Tani, C.
    Maleci Bini, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/57956.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    micromorphology
    anatomy
    fruit
    seed
    bitter melon zob.bitter gourd
    bitter gourd
    bitter squash zob.bitter gourd
    balsam-pear zob.bitter gourd
    Momordica charantia
    Cucurbitaceae
    medicinal plant
    scanning electron microscope
    Opis:
    The aim of this paper is investigating the micromorphological properties of fruits and seeds in the food and medicinal plant Momordica charantia L. (Cucurbitaceae). A detailed anatomical description on cross-sections of immature fruits and seeds is reported for the first time. The fruit is characterized by a thin epicarp, a multi-layered mesocarp and by an inconspicuous endocarp. The seed-coat displays a pattern of organization in five tissues. These endomorphic features were compared and discussed with the results of previous investigations on other representatives of the genus Momordica. Since the structure of seed-coat is considered diacritical in the taxonomy of the genus, this report may offer a set of additional character useful for the characterization of the genus.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2016, 85, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Xylem-fed maple sap accelerates balsam fir needle abscission and but can delay water loss in spring and autumn
    Autorzy:
    MacDonald, M.T.
    Lada, R.R.
    West, R.R.
    Nelson, K.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/40990.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    xylem
    abscisic acid
    Abies balsamea
    balsam
    fir tree
    balsam fir tree
    needle
    water content
    water uptake
    water loss
    spring
    autumn
    Opis:
    Postharvest balsam fir trees are known to suffer a number of problems that may be linked to abscission rates, such as dehydration or wounding. By definition, postharvest balsam fir trees are also detached from roots and will no longer be supplied certain root derived factors normally translocated via the xylem. Resupplying those root derived factors may delay abscission. The objective of this experiment was to take sap from a root intact species (i.e. Acer saccharum L) and add it to the water supply of balsam fir branches. Further, the effect of reverse osmosis and autoclaving the sap supply will be explored. The experiment was conducted once in spring and again in autumn to examine seasonal changes in needle abscission. The only hormones found in the maple sap were ABA and its metabolites, with PA (163.0 ng g–1) being the primary metabolite present. Needle retention was higher in branches harvested in autumn, as long as they were provided a sap that did not undergo RO. If the sap had undergone RO, then needle retention was slightly decreased in autumn. Needle retention generally decreased as the concentration of maple sap in the water supply increased and this trend was accelerated if the sap had undergone RO. Autoclaving the sap successfully delayed the length of time for water consumption to decrease, but this unexpectedly did not translate into improved needle retention.
    Źródło:
    Dendrobiology; 2016, 76
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of seeds of the invasive species Impatiens glandulifera Royle (Balsaminaceae) and their micromorphology
    Autorzy:
    Maciejewska-Rutkowska, I.
    Janczak, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/790625.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Przyrodniczy w Poznaniu
    Tematy:
    seed
    variability
    invasive species
    Impatiens glandulifera
    Himalayan balsam
    Balsaminaceae
    micromorphology
    Opis:
    The aim of the work was to estimate the range of morphological variability of seeds of the Himalayan balsam (Impatiens glandulifera), from different sites within Poland. It was also verified whether there was a correlation between morphological variability of seeds and type of vegetation from which they originated. Additionally, the seed coat ultrastructure of this species was studied. Biometrical analysis showed remarkable variability of seed morphology. A significant relationship between seed size and type of vegetation was also revealed. However, there was no clear relationship between seed mass and type of vegetation. Based on the structure and ornamentation of epidermal cells, the rugosely ruminate seed coat type was proposed.
    Źródło:
    Steciana; 2016, 20, 4
    1689-653X
    Pojawia się w:
    Steciana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modifying stomatal conductance delays dehydration but not postharvest needle abscission in Abies balsamea
    Autorzy:
    McCavour, C.A.
    MacDonald, M.T.
    Lada, R.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077756.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    postharvest
    water uptake
    Abscisic acid
    balsam fir
    needle abscission
    Opis:
    Postharvest needle abscission poses a significant challenge to the balsam fir (Abies balsamea L.) Christmas tree industry. Root detachment, and other postharvest handling and transporting factors, lead to a progressive dehydration leading to postharvest needle loss. If this were so, reducing the transpiratory wa- ter loss through regulating stomata would be expected to reduce dehydration extending needle retention. This study explored this hypothesis through manipulation of balsam fir stomata using chemical treatments to determine the effect on water uptake, relative water content, and needle abscission. Branches were col- lected from 70 trees and immediately applied a postharvest treatment of water (control), ABA, fluoridone, BAP, theophylline, potassium nitrate, or dopamine. Stomatal conductance decreased by 27% after applica- tion of ABA and increased by 24%, 17%, and 18% by fluoridone, BA, and potassium nitrate, respectively. Consequently, the ABA treatment resulted in a significantly lower water uptake while fluoridone, BAP, and potassium nitrate all increased water uptake. Despite changes in stomatal conductance and water uptake, there were no significant changes in needle retention. Needle abscission commenced after an average of 12.5 days from postharvest treatment application and reached 100% completion after an average of 71.9 days. It is possible to manipulate stomatal conductance and water uptake through chemical methods, but such a manipulation does not guarantee superior needle retention. It is proposed that deficiency of certain hormonal signals originating from roots may play a critical role in postharvest needle abscission.
    Źródło:
    Dendrobiology; 2019, 81; 65-72
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of the invasive plant Impatiens parviflora DC. by the snail Columella edentula Draparnaud in oak-hornbeam forests
    Autorzy:
    Piskorz, R
    Urbanska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/59016.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    balsam
    invasive plant
    Impatiens parviflora
    interaction
    botany
    Columella edentula
    snail
    oak-hornbeam forest
    Opis:
    This study investigated the extend to which the snail Columella edentula is more strongly associated with the small balsam Impatiens parviflora than with other plants in the herb layer of an oak-hornbeam forest, and to interpret the character of the interaction Impatiens parviflora - Columella edentula. Numbers of C. edentula and rates of colonization were compared on various plant species under natural and laboratory conditions. Seasonal variation in snail abundance on I. parviflora was observed on permanent plots. The leaf injuries caused by C. edentula were localized in respect of the morphological and anatomical structure of leaves. The results show that I. parviflora is one of the plant species of the herb layer that are most abundantly colonized by this snail in oak-hornbeam forest. Snail finds a plant particularly suitable as a place for resting. The most favoured attachment site is on the underside of the leaf, along the midrib, which provides the highest and relatively stable humidity, as well as protection from direct sunlight and predators. I. parviflora is also a food for the snails, but they do not eat these fragments of leaves where calcium carbonate is accumulated.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The spread of Impatiens parviflora DC. in Central European oak forests - another stage of invasion?
    Autorzy:
    Reczynska, K.
    Swierkosz, K.
    Dajdok, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/56626.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Impatiens parviflora
    spread
    Central Europe
    oak forest
    invasive plant
    long-term change
    plant species
    species composition
    forest vegetation
    small balsam
    Opis:
    In this study, we examine the pattern of occurrence of Impatiens parviflora in Central European oak forests over time and its ecological requirements within these types of communities. Research was based on phytosociological data collected in 3776 relevés. A modified TWINSPAN algorithm were used to distinguish the groups of oak forests. The ecological preferences of the I. parviflora and studied communities as well as differences between invaded and non-invaded vegetation plots were analyzed using mean weighted Ellenberg indicator values (EIVs). Finally, both the temporal pattern of I. parviflora participation and changes in its coverage in the studied communities were analyzed. Our study confirmed a high adaptability of this species with respect to temperature, moisture, soil reaction and nutrients and determined its broad ecological optimum in oak forests. However, it also revealed both a greater sensitivity of some communities within Central European oak forests to the invasion of I. parviflora and differences in habitat conditions between invaded and non-invaded vegetation plots. This suggests that the habitat niche of I. parviflora within oak forests is not accidental. The analysis of temporal changes in the frequency of I. parviflora confirmed a 20% increase in relevés over the last 50 years. However, we did not identify any statistically significant rise in the coverage of I. parviflora in oak forests specifically during the studied period.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2015, 84, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Żółtlice, kolczurki, niecierpki i inne rośliny inwazyjne w Szadku
    Gallant soldiers, wild cucumbers, himalayan balsams and other invasive alien plants in Szadek
    Autorzy:
    Woziwoda, Beata
    Suwara-Szmigielska, Sylwia
    Powiązania:
    https://bibliotekanauki.pl/articles/510368.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
    Tematy:
    gallant soldier
    wild cucumber
    himalayan balsam
    invasive alien plant
    Szadek
    żółtlica
    kolczurka
    niecierpek
    rośliny inwazyjne
    Opis:
    lnvasive alien plants are harmful non-native plant species whose introduction or spread threatens the environment, the economy, and society, including human health. They can be introduced from other continents or from one region of the same continent to another. The kenophytes are alien plants introduced to Europe after 1492. As much as 46 kenophytes have been recorded in Szadek (in years 2003-2009), what is almost 10% of the fiora of the city (in total: 502 vascular plant species). The most of "aliens” originate from the New World - from eastern and northern North America (22 species), and from northern South America and Central America (3). The species introduced from south-western, western or form central parts of Asia (19) and/or from southern, south-eastern or eastern Europe (18) are the next important group of alien plants. 27 species appear to have arrived in Europe and in Poland through intentional in- troductions (as omamentals, melliferous plants, as agricultural crop etc.). The others (19 species), now recognized as weeds, have been introduced for research or as botanical curiosities (and escaped from botanical collections, gardens etc.) or they were unintentionally brought with other plant products, packing material or in ballast soil. About 70% of noted kenophytes are recognized as invasive in Poland. Some of them, e.g. lmpatiens parviflora and Galinsoga parviƒlora, are already widespread in Szadek and poses threat native biodiversity. The others, e.g. Echinocystis lobata or Reynoutria japonica, are rarely noted, but the growing awareness of the threats posed by these species as well as of possible risk of their invasiveness, require monitoring of localities and active prevention of their further spread.
    Źródło:
    Biuletyn Szadkowski; 2012, 12
    1643-0700
    Pojawia się w:
    Biuletyn Szadkowski
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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