植物营养与肥料学报2011，Vol.17Issue(5)：1227-1236,10.
棉（Gossypium hirsutum L．）纤维发育相关酶和纤维比强度对棉铃对位叶氮浓度变化的响应研究
Effects of nitrogen concentration in subtending leaves of boll on related enzymes and strength formation of cotton fiber
高相彬 1王友华 1陈兵林 1薛占奎 1周治国1
作者信息
- 1. 南京农业大学,农业部南方作物生理生态重点开放实验室,江苏南京210095
- 折叠
摘要
Abstract
A 2 -year （2008 and 2009） study was conducted to explore the effects of subtending leaf nitrogen concentration on related enzymes （lnvertase, Sucrose synthase, Sucrose phosphate synthase and β-1,3-glucanase） and cotton fiber strength formation in a field of Nanjing（ 118°50＇E, 32°02＇N） in middle lower reaches of Yangtze River Valley in China. Different nitrogen rates were applied to carry out different leaf nitrogen concentrations, and cotton cultivars, Dexiamian 1, Kemian 1 and NuCOTN33B were used as experiment materials. The results show that the nitrogen concentration of subtending leaves is improved with increasing of nitrogen rates, and the changes of leaf nitrogen eoncentration can be described as the equation ： Yu = αt -β [ YN is nitrogen concentration in the subtending leaf of cotton boll（ % ） ; t is days post anthesis （d） ; α andβ are parameters ]. The related enzymes activities and fiber strength can be described as parabolic equations （ Y = ax^2 ＋ bx ＋ c, Y is enzyme activity or fiber strength, x is leaf nitrogen concentration, a, b and e are parameters） with the increasing of the subtending leaf nitrogen concentration. During the development of cotton fiber, the subtending leaf nitrogen concentration has significant effects on related enzymes activities and fiber strength, and there are small differences among optimal leaf nitrogen concentrations of related enzymes and fiber strength. related enzymes activities to best status and to nitrogen concentration to days post anthesis for Therefore, the leaf nitrogen concentration can be used to regulate enhance the fiber strength formation. The equations of optimal leaf Dexiamian 1 ,Kemian 1 and NDexiamianl=7.2841t^-0.2771（R^2=0.9860^＊＊）;Nkemianl=7.1807t^-0.2989（R^2=0.9879^＊＊）;NNuCOTN33B=7.1467t^-0.2819（R^2=0.9755^＊＊）.关键词
棉花/棉铃对位叶/叶氮浓度/酶活性/纤维比强度Key words
cotton/subtending leaf of cotton boll/leaf nitrogen concentration/enzyme activity/fiber strength分类
农业科技引用本文复制引用
高相彬,王友华,陈兵林,薛占奎,周治国..棉（Gossypium hirsutum L．）纤维发育相关酶和纤维比强度对棉铃对位叶氮浓度变化的响应研究[J].植物营养与肥料学报,2011,17(5):1227-1236,10.
