水土保持学报2011，Vol.25Issue(5)：168-171,4.
铝毒胁迫下磷对荞麦根系铝形态和分布的影响
Effect of Phosphorus on Speciation and Distribution of Aluminum in the Roots of Buckwheat Under Aluminum Toxicity
摘要
Abstract
To verify the effect of phosphorus on the speciation and distribution of aluminum in the roots,two buckwheat cultivars（Jiangxi buckwheat,Al resistant cultivar;and Neimeng buckwheat,Al sensitive cultivar） differing in Al resistance were used to compare Al tolerance between cultivars.Additionally,the total Al content,monomeric Al content in roots and Al distribution in root tips were measured as indicators of the effect of phosphorus on Al.Compared to a single Al treatment,phosphorus pretreatment increased relative root length by 24.4% and 35.9%,decreased the total Al content by 18.2% and 22.5%,and also reduced monomeric Al content by 95% and 63.2%,in Jiangxi and Neimeng cultivars,respectively.The cell walls of root tips with the exposure of Al showed a stronger fluorescence than those with phosphorus pretreatment.These results suggested that the phosphorus tended to transfer the Al speciation from phytotoxic forms to non-phytotoxic forms due to decrease the content of total Al and monomeric Al,and reduced the Al accumulation in cell wall,thus ameliorated Al-induced root growth inhibition,thereby promoted Al tolerance in buckwheat.关键词
荞麦/铝毒/磷/铝形态/细胞壁Key words
buckwheat/aluminum toxicity/phosphorus/aluminum form/cell wall分类
农业科技引用本文复制引用
王宁,郑怡,王芳妹,吴坤,刘建峰,蔡妙珍..铝毒胁迫下磷对荞麦根系铝形态和分布的影响[J].水土保持学报,2011,25(5):168-171,4.基金项目
国家自然科学基金资助项目 （）
浙江省自然科学基金资助项目 （）
