作物学报2012，Vol.38Issue(5)：880-886,7.DOI:10.3724/SP.J.1006.2012.00880
边缘细胞对水稻生长和细胞壁组分的影响及其与耐铝性的关系
Effects of Root Border Cells on Root Growth and Cell Wall Polysaccharide Contents in Rice Seedlings and Their Relation to Aluminum Tolerance
摘要
Abstract
Most plant root tips are sheathed by large populations of root border cells (RBCs). One of suggested roles of RBCs is to defend from toxic metal cations, including Al, in the rhizosphere. Using rice genotypes "II You 3027" (Al-resistant) and "Hongliangyou 166" (Al-sensitive) with treatments of different concentrations of Al3+, acroponic culture with RBCb adhered to or removed from root tips was conducted w study the effects of RBCs on root growth, Al content and cell wall polysaccharide contents in rout tips of rice seedlings under Al toxicity. A! Treatment inhibited root elongation and increased Al accumulation in the root tips. Removal of RBCs from root lips significantly enhanced Al-induced root growth inhibition and increased callose content, Al accumulation in root tips and root tip cell walls, and monomeric Al content in root tips. The removal of RBCs from root tips also significantly increased pectin and hemicellulose 1 contents in the cell walls of root tips, but did not affect the hemicellulose 2 contents. These results suggested that RBCs adhered to the root tips enhance Al tolerance of rice by decreasing Al, pectin and hemicellulose 1 contents in the cell walls of root tips, and contents of toxic species of Al in root tips.关键词
水稻/铝毒/边缘细胞/铝形态/细胞壁多糖Key words
Rice/ Al toxicity/ Root border cells/ Al species/ Cell wall polysaccharide引用本文复制引用
邢承华,张淑娜,吴坤,王宁,凌云..边缘细胞对水稻生长和细胞壁组分的影响及其与耐铝性的关系[J].作物学报,2012,38(5):880-886,7.基金项目
本研究由国家自然科学基金项目(31101599,30800705)和浙江省自然科学基金项目(Y3110561,Y307535)资助. （31101599,30800705）
