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	Different solute levels in two spring wheat cultivars induced by progressive field water stress at different developmental stages
	Zhu, X. ; Gong, H. ; Chen, G. ; Wang, S. ; Zhang, C. ; Zhu XY(朱学艺)
	2005
关键词	different developmental stage field drought solute response spring wheat X-ray microanalysis
英文摘要	Two cultivars of spring wheat (Triticum aestivum L.) with known drought-resistance rankings (cv. Dingxi 24 more tolerant than cv. Longchun 8139) were subjected to progressive field water stress throughout their growth. Except at the seedling stage, cv. Dingxi 24 showed a higher leaf water potential compared with cv. Longchun 8139 during the stress period. Leaf water potential, inorganic ions (Na+, K+, Ca2 +, Mg2+, Cl-), proline, betaine, soluble sugars and ATP content were studied in the two cultivars at various developmental stages. Contrary to the sensitive cv. Longchun 8139, consistent changes in K+ and Cl- levels and selective accumulation in K+ and Na+ were observed in Dingxi 24 mesophyll and bundle sheath cells evaluated by X-ray microanalysis and in leaves measured by atomic absorption spectrophotometer at the seedling and jointing stages. The responses of the two wheat cultivars to a decline in leaf water at the seedling and jointing stages of development included a net accumulation of inorganic ions and soluble sugar, while at the heading and grain-filling stages, there was an accumulation of betaine and proline. These results suggest that the changes in solute levels in different cultivars were closely related to their drought tolerance at different developmental stages. Mechanisms involved in solute accumulation in different cultivars and the relationship between solute accumulation and ATP consumption at different developmental stages during water stress are also discussed. © 2004 Elsevier Ltd. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/65147]
专题	生命科学－已发表论文
推荐引用方式 GB/T 7714	Zhu, X.,Gong, H.,Chen, G.,et al. Different solute levels in two spring wheat cultivars induced by progressive field water stress at different developmental stages[J],2005.
APA	Zhu, X.,Gong, H.,Chen, G.,Wang, S.,Zhang, C.,&朱学艺.(2005).Different solute levels in two spring wheat cultivars induced by progressive field water stress at different developmental stages..
MLA	Zhu, X.,et al."Different solute levels in two spring wheat cultivars induced by progressive field water stress at different developmental stages".(2005).

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