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Wyszukujesz frazę "ecophysiology" wg kryterium: Temat

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Photosynthetic activity in three vascular species of Spitsbergen vegetation during summer season in response to microclimate
    Autorzy:
    Barták, Miloš
    Váczi Peter
    Hájek, Josef
    Powiązania:
    https://bibliotekanauki.pl/articles/2051428.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Arctic
    Svalbard
    vascular plants
    plant ecophysiology
    net photosynthesis
    chlorophyll fluorescence
    Źródło:
    Polish Polar Research; 2012, 4; 443-462
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chromatin immunoprecipitation — new approach for revealing histone modifications in plants under heavy metal stress — theoretical review on advantages, drawbacks and questions
    Autorzy:
    Kwaśniewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/115479.pdf
    Data publikacji:
    2010
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    chromatin dynamics
    heavy metal stress
    ecophysiology
    ChIP
    immunoprecipitation
    histone modifications
    epigenetic
    Opis:
    Heavy metal contamination is a major environmental problem. A coordinated network of molecular processes participates in plant response to heavy metals. The metal-dependent gene expression is regulated on multiple levels and may include chromatin modifi cations. One of the methods which allows to understand the role of histone post-translational modifi cations in plant cell response to heavy metals may be chromatin immunoprecipitation.
    Źródło:
    Challenges of Modern Technology; 2010, 1, 1; 7-10
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obeche (Triplochiton scleroxylon K. Schum.): poor products development wood but good environmental tree in Nigeria
    Autorzy:
    Adedeji, Gabriel A.
    Oladele, Adekunle T.
    Eludoyin, Olatunde S.
    Aiyeloja, Adedapo A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1112611.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Ecophysiology
    Sterculiaceae
    Triplochiton scleroxylon
    co-infestations
    environmental services
    organisms inducing biodeterioration
    Opis:
    Obeche (Triplochiton scleroxylon K. Schum.) is a large tropical tree, the wood products of which are either in solid or reconstituted forms. These items are extremely vulnerable to concomitant insect attack. Although established as a successful plantation species for veneering and plywood production, Obeche is also considered as a good environmental tree in Nigeria. However, there is very little specific information that substantiates this potential. We report on the organisms inducing biodeterioration of Obeche wood products and describe the characteristics of Obeche trees in terms of environmental suitability between 2012 and 2016. All the 47 Obeche wood-based products (OWBPs) studied, comprising 12 beehives, 10 food canteen stalls, 10 office tables, 10 laboratory cabinets and 5 office walls were economically and dominantly co-infested by beetles and termites. Interestingly, during the four-year observation period, all the eight Obeche trees encountered were found to exhibit high stability with excellent resistance to hollowness and to degradative pests, even at around 2 m Diameter at Breast Height (DBH). This reflects its robust biophysical protective barrier mechanisms. Additionally, there were observations of enhanced coexistence with other tree species, including shrubs and grasses. This indicates a tolerance potential role at improving the relative contributions of several species (plants community) to ameliorate tropical environmental degradation.
    Źródło:
    World News of Natural Sciences; 2018, 18, 2; 203-212
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of temperature on the biological properties of soil
    Autorzy:
    Borowik, A.
    Wyszkowska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/26575.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil temperature
    soil property
    biological property
    microorganism
    biodiversity
    ecophysiology
    enzyme activity
    Źródło:
    International Agrophysics; 2016, 30, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photosynthetic ecophysiology of evergreen leaves in the woody angiosperms - a review
    Autorzy:
    Wyka, T.P.
    Oleksyn, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/40993.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    photosynthesis
    ecophysiology
    evergreen plant
    leaf
    plant anatomy
    angiosperm
    winter photosynthesis
    winter photoinhibition
    Opis:
    Evergreen plants are an important component of many ecosystems of the world and occur in numerous evolutionary lineages. In this article we review phenotypic traits of evergreen woody angiosperms occurring in habitats that regularly experience frost. Leaf anatomical traits such as sclerenchymatic tissues or prominent cuticles ensure mechanical strength while often enhancing tolerance of water deficit. The low ratio of photosynthetic to nonphotosynthetic tissues as well as modified cell wall structure and nitrogen allocation patterns in evergreen leaves result in lower mass-based photosynthetic rate and photosynthetic nitrogen use efficiency in comparison with deciduous leaves. Their photosynthetic apparatus is adapted for the survival of frost in a down-regulated state with potential for photosynthetic activity in winter during periods of permissive temperatures. Leaf structure interacts with the mechanisms of frost survival. Stem xylem in evergreen plants tends to contain smaller diameter conduits incurring greater resistance to freeze/ thaw induced cavitation than in deciduous plants, although at the cost of reduced hydraulic efficiency. In contrast, no such differences in hydraulic conductivity have been documented at the leaf level. There is evidence for reduced structural plasticity of evergreen leaves in response to variability in irradiance, however photosynthetic downregulation occurs in mature leaves in response to self shading. Some evergreen species exhibit slow leaf development and “delayed greening”, while in many species aging is also a very protracted process. Finally, evergreen leaves may participate in carbohydrate and, less obviously, in nitrogen storage for the support of spring shoot and foliage growth, although the importance of this function is under debate. In conclusion, the evergreen leaf habit is correlated with numerous structural and functional traits at the leaf and also at the stem level. These correlations may generate trade-offs that shape the ecological strategies of evergreen plants.
    Źródło:
    Dendrobiology; 2014, 72
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hygrophilous old-growth forest lichens are highly capable of instantaneous photosynthesis activation after short-term desiccation stress
    Autorzy:
    Osyczka, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2142054.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    bioindicators
    chlorophyll fluorescence
    lichen ecophysiology
    lichenized fungi
    old-growth forest lichens
    photosynthesis activation rate
    lichen photobiont properties
    Opis:
    The vitality of lichens and their growth depend on the physiological status of both the fungal and algal partner. Many epiphytic lichens demonstrate high specificity to a habitat type and hygrophilous species are, as a rule, confined to close-to-natural forest complexes. Tolerance to desiccation stress and the rate of photosynthesis activation upon thallus hydration vary between species. Analyzes of chlorophyll fluorescence and photosynthesis efficiency have been widely applied to determine the viability of lichens. The aim of this study was to determine the activation photosynthesis rate upon hydration in epiphytic lichens exposed to short-term desiccation stress and to find potential links between their activation pattern and ecological properties. The results proved that even highly sensitive hygrophilous lichens, i.e., Cetrelia cetrarioides, Lobaria pulmonaria, Menegazzia terebrata, do not exhibit any delay in the restart of the photosynthesis process, compared to mesophytic or xerophytic ones. All examined lichens achieved nearly 100% of their maximum photosynthetic efficiency just one hour after they had been supplied with a relatively small quantity of water. Moreover, the increase in photosynthesis efficiency, measured at 20-minute intervals upon hydration, started from a relatively high level. In addition, the differences in the content of photosynthetic pigments and water holding capacity between species did not affect the general pattern of activation, which is comparable across various lichens. It can be concluded that healthy hygrophilous lichens do not require long hydration time to regain a high level of photosynthesis efficiency after a short rainless period. This fact supports the idea of applying chlorophyll fluorescence analysis in the field to assess vitality of lichens and the condition of their natural habitat.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2022, 64, 1; 15-25
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative studies on the morphometry and physiology of European populations of the lagoon specialist Cerastoderma glaucum (Bivalvia)
    Autorzy:
    Tarnowska, K.
    Wolowicz, M.
    Chenuil, A.
    Feral, J.-P.
    Powiązania:
    https://bibliotekanauki.pl/articles/48074.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    ecophysiology
    Baltic Sea
    morphometry
    bivalve
    lagoon
    European population
    Cerastoderma glaucum
    physiological parameter
    seasonal change
    adaptation
    Mediterranean Sea
    cockle
    North Sea
    Bivalvia
    Opis:
    Seasonal changes in the morphometric and physiological parameters of the cockle Cerastoderma glaucum (Bivalvia) from the Baltic Sea (GD), the North Sea (LV), and the Mediterranean Sea (BL) were investigated. The cockles from GD were much smaller than those from other populations due to osmotic stress. The female to male ratios did not differ significantly from 1 : 1. The northern populations (GD, LV) had a monocyclic reproductive pattern, whereas the southern population (BL) seemed to reproduce throughout the year. Seasonal changes in the contents of biochemical components appeared to be correlated with changes in trophic conditions and the reproductive cycle. Protein content was the highest in spring for all the populations. The highest lipid contents and lowest carbohydrate contents were noted in GD and BL in spring, while no marked differences were noted among seasons in LV (probably because the data from both sexes were pooled). Respiration rates in GD were the highest among the populations, which could have been due to osmotic stress. High metabolic rates expressed by high respiration rates in GD and LV in spring and autumn could have resulted from gamete development (in spring) and phytoplankton blooms (in spring and autumn).
    Źródło:
    Oceanologia; 2009, 51, 3; 437-458
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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