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Wyszukujesz frazę "salinity condition" wg kryterium: Temat

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    Wyświetlanie 1-2 z 2
    Tytuł:
    Proliferation of peroxisomes in pea root nodules - an influence of NaCl- or Hg2plus-stress conditions
    Autorzy:
    Borucki, W
    Powiązania:
    https://bibliotekanauki.pl/articles/58800.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    proliferation
    peroxisome
    pea
    root nodule
    sodium chloride
    stress condition
    Pisum sativum
    cytochemistry
    catalase activity
    morphometry
    salinity
    mercury treatment
    Opis:
    Morphometric procedures were used to examine peroxisome number and di-stribution in pea (Pisum sativum L.) root nodules under NaCl (50 mM) or HgCl2 (7.3 µM) treatment. Peroxisomes were visualized cytochemically in meristem, invasion zone and prefixing zone of pea root nodules by catalase (EC 1.11.1.6) activity. The observations using light and electron microscopy revealed that the peroxisomes were predominantly spherical in shape and showed catalase activity. In nitrogen fixation zone, catalase active peroxisomes were observed occasionally. Bacteroids of nitrogen fixing zone showed enhanced cata-lase activity probably as a response to higher level of oxidative stress. Fluorescence microscopy investigations revealed enhanced level of (homo)glutathione in prefixing and nitrogen-fixing zone of NaCl- and Hg2+treated nodules, which served as an indicator of antioxidative response. Morphometric measurements revealed that during differentiation of meristematic cells into central tissue (bacteroidal tissue) cells an increase in peroxisome number was observed in unstressed nodules. Peroxisomes located in meristem, invasion zone and prefixing zone of NaCl- and Hg2+-treated nodules outnumbered that in control nodules. A substantial enlargement of peroxisome profiles was detected in NaCl- and Hg2+treated nodules. Peroxisome divisions observed in meristematic and infection thread penetration zone were responsible for an increase in peroxisome number.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 4; 287-298
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Response of maize [Zea mays L.] to rimsulfuron under salt conditions
    Autorzy:
    Sacala, E
    Demczuk, A.
    Michalski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/56629.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    sulphonylurea
    Zea mays
    agriculture
    Titus 25 DF herbicide
    photosynthetic pigment
    herbicide
    protein
    salinity
    salt condition
    growth reduction
    rimsulfuron
    maize
    Opis:
    Investigations were carried out to determine the possible interaction between salinity (60 mmol*dm-3 NaCl) and phytotoxicity of herbicide Titus 25 DF (sulfonylurea herbicide containing active ingredient rimsulfuron). The herbicide was added to the nutrient solution at two concentrations - 1 or 100 nmol*dm-3. After 7 days of cultivation in the nutrient solution determined were the growth parameters and some biochemical compounds (photosynthetic pigments, total protein and free amino compounds content). The combined action of 1 nmol*dm-3 rimsulfuron and salt caused a reduction in plant biomass accumulation, but this reduction was due to the salt itself. In the presence of 100 nmol*dm-3 rimsulfuron, growth inhibition of maize roots was very high and salinity did not modify herbicide toxicity. However, reduction in maize shoots growth equalled the sum of the reductions caused by each particular factor applied separately (additive effect). The reduction in shoot fresh weight reached 64%. The investigated stress factors induced a significant increase in amino compounds, with the exception of maize roots grown under NaCl plus 100 nmol-dm-3 rimsulfuron. The concentration of total protein in maize roots diminished under NaCl and 100 nmol*dm-3 rimsulfuron, although in the other cases, it did not change distinctly in comparison to the control. All factors, with the exception of NaCl, induced a slight increase in protein contents in maize leaves. Stress factors did not change significantly the total chlorophyll concentration, however, carotenoid content was markedly reduced. Nevertheless, the combined action of 100 nmol*dm-3 rimsulfuron and NaCl caused a 10% increase in carotenoid content as compared to the control plants. In conclusion, salinity did not change the toxicity of the herbicide applied in low dose (1 nmol*dm-3), but it did increase herbicide toxicity at high concentration (100 nmol*dm-3) regarding the maize shoots.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2003, 72, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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