根瘤形成过程中豆科植物根毛和根外层传递细胞的诱发(英文)  

Inducement of Root Hair and the Root Epidermal Transfer Cells during the Formation of Root Nodule in Leguminous Plants

作　　者：林树燕[1] 吴均章[2] 韩素芬[1] 

机构地区：[1]南京林业大学,南京210037 [2]苏州大学,江苏苏州215000

出　　处：《西北植物学报》2008年第4期697-703,共7页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金(39970601)

摘　　要：对7种豆科植物接种根瘤菌后根部的形态和内部结构进行了研究.结果表明:根瘤菌可诱发根瘤形成部位根段的根毛增生、形变和根外层传递细胞的发育.根外层传递细胞发生在根毛伸长形变时期,一直可持续到根瘤形成,传递细胞壁内突发育过程是先由根表皮细胞外切向壁一侧细胞质膜向细胞质内陷形成囊状壁傍体,次生细胞壁物质在初生壁上沉积并逐渐充满囊状体,最终形成传递细胞典型的壁内突结构.根瘤形成过程中根外层传递细胞的诱发与培养方式(水培、固培)没有直接关系.在不接菌的对照苗的根段内未发现壁内突结构,研究证明豆科植物根外层传递细胞的形成是由根瘤菌诱导所致.The morphology and anatomy of 7 legume species with the rhizobia were investigated. The results showed that the hyperplasy of root hair, root deformation and the development of the root epidermal transfer cells were induced by rhizobia. The transfer cells began to develop from the phase of root hair deformation,and they could live until the formation of the nodule. Cell membrane ingrowths were first observed at the initial stage of the root hair deformation, then the wall material gradually deposited and finally transfer cells formed. The development of transfer cells had no relation with the medium whether it was solid or liquid. The transfer cell did not exist in the root which was not inoculated by the rhizobia.

关 键 词：豆科植物 根瘤 根瘤菌 根毛 传递细胞 

分 类 号：Q948.122.2[生物学—植物学]