Cultivar-specific high temperature stress responses in bread wheat (Triticum aestivum L.) associated with physicochemical traits and defense pathways
Cultivar-specific high temperature stress responses in bread wheat (Triticum aestivum L.) associated with physicochemical traits and defense pathways
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DOI：
10.1016/j.foodchem.2016.11.053
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发表时间：
2017-04-15
期刊：
影响因子：
8.8
通讯作者：
Chakraborty, Niranjan
中科院分区：
文献类型：
--
作者：
Mishra, Divya;Shekhar, Shubhendu;Chakraborty, Niranjan
据估计，全球气温每升高1摄氏度，农作物的收获指数就会降低6%，这肯定会对植物的整体代谢产生负面影响。小麦是最重要的农作物之一，全球年产量超过 6 亿吨。我们研究了一系列理化和分子指标，以揭示九个商业小麦品种对高温胁迫（HTS）的差异反应。相对水含量的降低、更高的膜稳定性、缓慢的叶绿素降解以及脯氨酸和次生代谢物积累的增加，使 cv 具有更高的耐热性。乌纳特·哈尔纳 (Unnat Halna) 等。几种应激反应基因的表达改变，特别是与光合作用、热休克蛋白和抗氧化剂相关的基因，影响了不同遗传背景下 HTS 诱导反应的复杂性和适应性机制的连通性。这可能有助于有针对性地操纵农作物的代谢途径，用于农业和工业开发。 (C) 2016 Elsevier Ltd. 保留所有权利。
The increasing global temperature by 1 degrees C is estimated to reduce the harvest index in a crop by 6%, and this would certainly have negative impact on overall plant metabolism. Wheat is one of the most important crops with global annual production of over 600 million tonnes. We investigated an array of physicochemical and molecular indexes to unravel differential response of nine commercial wheat cultivars to high temperature stress (HTS). The reduced rate in relative water content, higher membrane stability, slow chlorophyll degradation and increased accumulation of proline and secondary metabolites ingrained higher thermotolerance in cv. Unnat Halna, among others. The altered expression of several stress-responsive genes, particularly the genes associated with photosynthesis, heat shock proteins and antioxidants impinge on the complexity of HTS-induced responses over different genetic backgrounds and connectivity of adaptive mechanisms. This may facilitate the targeted manipulation of metabolic routes in crops for agricultural and industrial exploitation. (C) 2016 Elsevier Ltd. All rights reserved.