期刊
PLANT CELL AND ENVIRONMENT
卷 26, 期 8, 页码 1267-1274出版社
WILEY
DOI: 10.1046/j.0016-8025.2003.01051.x
关键词
Triticum aestivum L.; apoplast; calcium; intercellular fluid; intracellular fluid; NaCl
Salinity aggravates B toxicity symptoms in several plant species. In the present study the interactive effects of B toxicity and salinity stresses on the subcellular distribution of boron, cations and proteins in basal and apical leaf sections of wheat were investigated. High B supply increased total B concentrations in all leaf parts, but values remained below 25 mg B kg(-1) dry weight (DW) in basal sections, whereas they reached more than 600 mg B kg(-1) DW in leaf tips. In basal leaf sections intercellular soluble B concentrations closely reflected the external supply, whereas intracellular soluble B concentrations remained lower by a factor of two, indicating some retention of excess B in the apoplast. Combined salinity and B toxicity stresses significantly increased soluble B concentrations in inter- and intracellular compartments of basal leaf sections in comparison with either stress alone, probably related to salinity-induced changes in water status. The combined stresses also induced quantitative and qualitative changes in inter-, but not intracellular protein composition. Most obvious was the induction of a 25 kDa protein and an increase in amount of a 33 kDa protein. It is suggested that these changes might be due to structural modifications of the cell wall. The concentration of soluble boron in cells is proposed to be an indicator of boron toxicity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据