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 Wysłany: Pon 22:26, 17 Sty 2011 Temat postu: Osmotic stress on root and hypocotyl of cotton fat |
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Osmotic stress on cotton root and hypocotyl PM ATPase of fatty acid composition
Protein interactions (TANG Zhang-Cheng 1981; c.L ~ l \Increase in membrane fatty acid saturation help to improve the membrane phase transition temperature, is conducive to plant on the water 44 minutes Northwest Plant l4 volume control (Yang Jingfeng, etc. 1984). The experimental results showed that cotton root and hypocotyl PM the same fatty acid composition,[link widoczny dla zalogowanych], mainly by 160,18 t0, 182,[link widoczny dla zalogowanych],18:3 composition and high content of saturated fatty acids, which is consistent with the conclusions of many researchers (Rochesteretd,. 1987; YoshidaandUemura, 1986,[link widoczny dla zalogowanych],1984; Mahleretal. 1988) drought index fell PM unsaturated, saturated fatty acid content increased, a greater increase in 24-hour stress, changes with time is small. That changes in membrane permeability and saturation of fatty acids associated with a certain fatty acid saturation increased in favor of plants to water control. Paha (1973) that the permeability of the plasma membrane under stress changes and the plasma membrane ATPase related. Raisoneta1. (1976) that the membrane fluidity and membrane-bound enzyme has a direct correlation. The experimental results show that a membrane permeability under the 0.3MPa stress first high, then gradually close the control level, PMCa one by one ATPase,[link widoczny dla zalogowanych], Mg \1.1MPa stress membrane permeability and increased first high to low, indicating that the membrane structure was hurt, the enzyme activity decreased, dry wells that force the affected plant membrane structure, fatty acid composition changes,[link widoczny dla zalogowanych], resulting in membrane-bound enzyme ( proton pump) activity changes affecting the membrane permeability changes.
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