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首页> 外文期刊>Biology Bulletin >Effect of Vernalization and Red Light Illumination of Seedlings of Bread Wheat (Triticum aestivum L.) on the Temperature Profile of cAMP Phosphodiesterase Activity
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Effect of Vernalization and Red Light Illumination of Seedlings of Bread Wheat (Triticum aestivum L.) on the Temperature Profile of cAMP Phosphodiesterase Activity

机译：面包小麦春化和红光照明对cAMP磷酸二酯酶活性温度曲线的影响

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摘要

Phenotypic manifestations of Vrn (vernalization) and Ppd (photoperiod) genes responsible for transition of bread wheat Triticum aestivum L. to generative growth (flowering) are mutually related. Since the mechanism of phytochrome-induced photoperiodism involves the enzymes of cyclic adenosine monophosphate metabolism, and phosphodiesterase in particular, we tested involvement of phosphodiesterase in the process of winter wheat vernalization and formation of flowering competence in alternate wheat requiring a long photo-period but no vernalization for its transition to flowering. We studied temperature dependence of phosphodiesterase activity in vernalized and unvernalized winter wheat on the one hand and in etiolated and red light illuminated seedlings of alternate wheat on the other hand. Short-term experiments demonstrated that red light illumination is similar to long photoperiod by the effect on the long-day plants. Both influences induced a pronounced inversion of the temperature profile of phosphodiesterase activity in the 28―45℃ range. We propose that phosphodiesterase is involved in vernalization and can serve as a receptor of low temperature in winter wheat. Changed temperature profile is a radical control mechanism of phosphodiesterase activity in response to the influences (red light and vernalizing temperatures) responsible for competence of various bread wheat forms for generative growth.
机译：Vrn（春化）和Ppd（光周期）基因的表型表现与面包小麦普通小麦向生殖生长（开花）的转化有关。由于植物色素诱导的光周期机制涉及环状腺苷单磷酸代谢的酶，特别是磷酸二酯酶，因此我们测试了磷酸二酯酶在冬小麦春化过程中的形成以及在需要较长光周期但不需长期光合作用的小麦中形成开花能力的过程。过渡到开花的春化。我们一方面研究了春小麦和未春小麦冬小麦中磷酸二酯酶活性的温度依赖性，另一方面研究了替代小麦中黄化和红光照射的幼苗中磷酸二酯酶活性的依赖性。短期实验表明，红光照射对长日照植物的影响类似于长光周期。两种影响均导致磷酸二酯酶活性的温度曲线在28-45℃范围内发生明显反转。我们建议磷酸二酯酶参与春化处理，并可以用作冬小麦的低温受体。温度曲线的变化是磷酸二酯酶活性的根本控制机制，可响应各种面包小麦形式产生生殖生长所需的能力（红光和春化温度）。

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