干旱对玉米幼苗吸收磷素的影响  

EFFECTS OF DROUGHT ON THE ABSORPTION OF PHOSPHORUS IN MAIZE SEEDLINGS

作　　者：胡安畅[1] 沈秀瑛[1] 戴俊英[1] 顾慰连[1] 赵润东[1] 王光洁[1] 郑波[1] 

机构地区：[1]沈阳农业大学,沈阳110161

出　　处：《核农学报》1991年第2期101-106,共6页Journal of Nuclear Agricultural Sciences

基　　金："七五"期间农业部重点课题

摘　　要：本文研究了玉米幼苗在干旱处理下^(32)P的吸收,以及油菜素内酯(BR)和钙浸种对磷素营养的生理效应。结果表明,玉米幼苗根系对磷的吸收和向叶部转移量随干旱强度增大而减少;油菜素内酯和钙有增加根系吸收表面积 提高叶片相对含水量和根中ATP含量。The absorption and transportation of H232PO4-and the role of Brassin-olide(BR) and Ca2+ in phosphorus nutrition in maize seedlings were studied under drought conditions caused by PEG-Knop nutrient solution of-0.3 anp-1.1 MPa osmotic pressure.The results indicated that the quantities of phosphorus absorbed and transported to leaves in maize sedlings decreased with increase of drought intensity;phosphorus transportation to leaves was more sensitive to drought than absorption by roots BR and Ca2+ had the effects of promoting root growth,increasing the surface area of absorption,relative water content in plants and ATP content in roots,and enhancing absorption and transportation of phosphorus.

关 键 词：玉米 幼苗 吸收 磷素 干旱 

分 类 号：S513.01[农业科学—作物学]