核农学报2011，Vol.25Issue(2)：331-336,6.
库源改变对新疆高产棉花14C-同化物分配及内源激素含量的影响
EFFECTS OF SOURCE AND SINK MANIPULATION ON DISTRIBUTION OF 14C-ASSIMILATE AND ENDOGENOUS HORMONE CONTENTS OF HIGH-YIELD COTTON IN XINJIANG
摘要
Abstract
Effects of leaf-cutting and bud-thinning treatment on partitioning of 14C-assimilate and endogenous hormone contents of source leaf ( respective axial leaf and sympodian leaf) during flowering and boll-setting stage in high-yield cotton were studied by using Gossipium hirsutum L. cv. Xinluzaol3 as plant material. Results showed that bud-thinning reduced the peak value of indole-3-acetic acid (IAA) delayed the accumulation of isopenteny ladenime and its riboside ( iP + iPA), and decreased the contents of abscisic acid (ABA) zeatin and its riboside ( Z + ZR) of source leaf. Thus, the export and partitioning of percentage of14 C-assimilate in boll was significantly decreased at full bolling and boll opening stages. As a result, both of boll weight and yield in bud-thinning were significantly lower than control. Leaf-cutting significantly improved the content of cytokinins (CTKs) and the distributive percentage of 14C-assimilates in boll.Furthermore, when leaves were cutted 1/4 at anthesis, no differences were found in number of bolls per plant, boll weight and yield compared with control. These results suggested that regulating source-sink relation with key practices of cultivation would be of great importance to super-high and stable yield of cotton, as it would affect the changes of endogenous hormone levels and regulate the distribution of 14 C-assimilate between source and sink.关键词
棉花/源库调节/14C-同化物/内源激素/产量Key words
cotton/ source-sink relation/ 14 C-assimilate/ hormones/ yield引用本文复制引用
罗宏海,赵瑞海,李俊华,张亚黎,张旺锋..库源改变对新疆高产棉花14C-同化物分配及内源激素含量的影响[J].核农学报,2011,25(2):331-336,6.基金项目
国家自然科学基金项目(30260051),国家"十一五"科技支撑计划项目(2006BAD21B02-1) （30260051）
