棉花学报2005，Vol.17Issue(3)：165-170,6.
棉花钾吸收动力学的初步研究和应用
Preliminary Study of K+ Uptake Kinetics of Cotton (Gossypium hirsutum L.)and its Application
摘要
Abstract
It has been a main problem in cotton production that transgenic insect-resistant cotton is prone to premature senescence induced by K+ deficiency, which makes it necessary to study K+ up take characteristics and, on the basis of it, to screen cotton cultivars with high K+ uptake efficiency. This experiment studied the factors influencing K+ uptake kinetic parameters of cotton, preliminarily identified the conditions of K+ uptake kinetic applied to cotton, and compared the K+ uptake characteristics of transgenic insect-resistant cotton cultivar, DP99B, and conventional cotton cultivar, CCRI 35, at seedling stage. The results showed that K+ uptake kinetic parameters were significantly affected by seedling stage, initial K+ concentration in depleting solution and K+ concentration in culturing solution. Higher Km and Cmin resulted from younger seedling (3～4 vs. 4～5 leaf stage), higher initial tions, and lower Imax came into being under the last situation. Compared with CCRI 35, DP99B had uptake limited K+ was weaker than that of CCRI 35.关键词
棉花/钾/吸收动力学Key words
cotton/K+/uptake kinetics分类
农业科技引用本文复制引用
张志勇,王刚卫,田晓莉,李召虎,段留生,翟志席,何钟佩..棉花钾吸收动力学的初步研究和应用[J].棉花学报,2005,17(3):165-170,6.基金项目
国家自然科学基金(30100111) （30100111）
