水分胁迫下棉花脂肪酸组成的变化远红光与抗旱性的关系

Zeitschrift für Pflanzenphysiologie Pub Date : 1984-04-01 DOI:10.1016/S0044-328X(84)80017-3

M. Ouedraogo, A. Tremolieres, C. Hubac

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引用次数: 14

摘要

光周期可以改变棉花对水分胁迫的抗性:短日照条件下生长的植株对水分胁迫具有抗性，FR增强了其抗性。研究表明，FR提高了水经济性。水分胁迫下脂肪酸组成的测定是在FR诱导的抗旱条件下进行的。在根系中，FR处理导致脂肪酸饱和。在水分胁迫期间，脂肪酸含量普遍下降，脂肪酸趋于饱和。在9h光照期和9h光照+ FR时都是如此。这些变化可能与膜流动性的变化有关。如果没有FR，水分胁迫会导致芽中脂肪酸含量显著降低。当FR给定时，水分胁迫对脂肪酸含量没有影响，在这些条件下，脂肪酸含量总是低于没有FR的非水分胁迫植物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Change in Fatty Acids Composition During Water stress in Cotton Plants. Relation With Drought Resistance Induced by Far Red Light

The resistance of cotton to water stress can be modified by the photoperiod: plants grown under short day conditions are resistant to water stress, and FR enhances their resistance. It has been shown that FR improves water economy.

The determination of the composition of fatty acids during water stress was carried out under drought resistance induced by FR. In roots, FR treatment causes saturation of fatty acids. During water stress, there is a general decrease in the content of fatty acids, with saturation of fatty acids. This is true in 9 h light period and in 9 h light + FR. These changes can be related to variations in membrane fluidity.

Without FR, water stress causes a marked decrease in the content of the fatty acids in the buds. When FR is given, water stress has no effect on fatty acids content, which, under these conditions, is always lower than in non water stressed plants without FR.

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