Old and New Cultivars of Soya Bean (Glycine max L.) Subjected to Soil Drying Differ in Abscisic Acid Accumulation, Water Relations Characteristics and Yield
Old and New Cultivars of Soya Bean (Glycine max L.) Subjected to Soil Drying Differ in Abscisic Acid Accumulation, Water Relations Characteristics and Yield
复制标题
土壤干燥后的新旧大豆品种在脱落酸积累、水分关系特征和产量方面存在差异
DOI：
10.1111/jac.12143
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发表时间：
2016-10-01
影响因子：
3.5
通讯作者：
Li, F. -M.
中科院分区：
文献类型：
--
作者：
He, J.;Du, Y. -L.;Li, F. -M.
两个老品种（黄色大豆和陇西小黄皮）和两个新品种（晋豆19（JD）和中黄30（ZH））大豆（Glycine max（L.）梅尔）研究了土壤干旱对不同品种叶片脱落酸（阿坝）积累、气孔导度（g（s））、叶片水分关系、渗透调节（OA）、叶片脱水耐性、产量及产量构成因素的影响。土壤干旱诱导大豆新品种阿坝积累量增加，在较高土壤含水量下GS下降，在较低土壤含水量下叶片相对含水量显著下降。气孔开始关闭和RWC开始下降的土壤水分阈值之间的值显着扩大在新品种比老品种。当土壤干燥时，新品种比老品种具有显着更高的OA和更低的致死叶水势。在充分供水、中度胁迫和重度胁迫条件下，老品种生物量高于新品种，但籽粒产量低于新品种。因此，随着土壤干燥，新大豆品种通过诱导更大的阿坝积累、更高SWC下的气孔关闭、增强的OA和更好的水分关系，表现出对干旱的更大适应性，并与叶片干燥耐受性增强、水分利用效率提高和产量提高相关。
Two old (Huangsedadou and Longxixiaohuangpi (LX)) and two new (Jindou 19 (JD) and Zhonghuang 30 (ZH)) soya bean (Glycine max (L.) Merr.) cultivars were used to investigate the influence of soil drying on the abscisic acid (ABA) accumulation in leaves, stomatal conductance (g(s)), leaf water relations, osmotic adjustment (OA), leaf desiccation tolerance, yield and yield components. The greater ABA accumulation was induced by soil drying, which also inducing gs decreased at higher soil water contents (SWC) and leaf relative water content (RWC) significantly decreased at lower SWC in the new soya bean cultivars than in the old soya bean cultivars. The soil water threshold between the value at which stomata began to close and the RWC began to decrease was significantly broader in the new cultivars than in the old cultivars. The new cultivars had significantly higher OA and lower lethal leaf water potential than old cultivars when the soil dried. The old cultivars had greater biomass, but lower grain yield than the new cultivars in well-watered, moderate stress and severe stress conditions. Thus with soil drying, the new soya bean cultivars demonstrated greater adaptation to drought by inducing greater ABA accumulation, stomatal closure at higher SWC, enhanced OA and better water relations, associated with increased leaf desiccation tolerance, greater water use efficiency and higher yield.