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首页> 外文期刊>The Journal of Horticultural Science & Biotechnology >Changes in endogenous ABA level in relation to the dormancy cycle in grapevines grown in hot climate
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Changes in endogenous ABA level in relation to the dormancy cycle in grapevines grown in hot climate

机译：炎热气候下葡萄藤休眠周期与内源ABA水平的变化

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摘要

In warm-winter regions, the need for artificial means to compensate for the lack of natural chilling becomes a dominant factor for maintaining economic production of table grapes. However, in the absence of a reliable method of predicting the time of natural bud break, the application of the dormancy breaking agent hydrogen cyanamide (HC) entails the risk of serious bud damage if the application is mistimed. In several studies in temperate regions, concentrations of endogenous abscisic acid (ABA) were found to increase as the grape buds entered dormancy, and to decrease during winter months towards dormancy release. To assess the possibility of using bud ABA content as a marker for the stage of bud dormancy in grapevines grown in hot regions, we evaluated the dormancy depth of grape buds in the course of the dormancy cycle and monitored their endogenous ABA content in cv. Perlette vines grown in the Jordan Valley. The endogenous ABA content was highest at maximum dormancy. However, the decline in ABA content was not correlated with dormancy release. The involvement of ABA in dormancy induction and maintenance is discussed.
机译：在温暖的冬季地区，需要采用人工手段来弥补自然寒冷的不足，这成为维持鲜食葡萄经济生产的主要因素。但是，在缺乏可靠的自然芽破裂时间预测方法的情况下，如果使用时机错误，则使用休眠破坏剂氰胺氢氰化氢（HC）会导致芽严重受损。在温带地区的几项研究中，发现内源脱落酸（ABA）的浓度随着葡萄芽进入休眠而增加，并在冬季向休眠释放的月份降低。为了评估在高温地区生长的葡萄中使用芽ABA含量作为标记休眠期的可能性，我们评估了休眠周期中葡萄芽的休眠深度，并监测了其在cv中的内源ABA含量。在约旦河谷种植的Perlette葡萄藤。内源性ABA含量在最大休眠时最高。但是，ABA含量的下降与休眠释放无关。讨论了ABA在休眠诱导和维持中的作用。

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