棉花学报2017，Vol.29Issue(3)：283-291,9.DOI:10.11963/1002-7807.zmfg.20170329
不同磷效率棉花根系形态和磷酸酶活性对供磷强度的响应
Response of Root Morphology and Phosphatase Activity of Cotton to Phosphorus Supply
摘要
Abstract
[Object] To understand the variation of the response of root morphology and phosphatase activity of two cotton varieties to five phosphorus supply levels.[Method] A high phosphorus efficient variety Xinluzao 19 and a low phosphorus efficient variety Xinluzao 13 were selected as testing plants,through comparing the changes of biomass,phosphorus content,root morphology and phosphatase activity at different phosphorus supply levels in nutrient solution culture.[Result] When phosphorus supply was higher than 50 μmol· L 1,the increase of phosphorus supply will not improve biomass and root length anymore.The activity of phosphatase on cotton root surface decreased sharply with the increase of phosphorus supply,the activity of acid phosphatase at actual pH was negatively correlated with plant phosphorus concentration.The response of root morphology to phosphorus supply was not sensitive,there was a significant difference only under the conditions between treatment of no phosphorus and those of phosphorus supply.When phosphorus supply was 0～250 μmol· L-1,the P utilization efficiency of Xinluzao 19 was significantly higher than that of Xinluzao 13.[Conclusion] It can be considered that the response of cotton root morphology characteristic parameters and the quantity of the root release of protons and organic acids to phosphorus supply is not sensitive.This provided a very effective experimental material on saving phosphorus and increasing its efficiency of the biological potential and regulation pathway of cotton with phosphorus utilization efficiency genotypes discovered.关键词
棉花/供磷强度/磷酸酶/根系形态/磷效率Key words
cotton/phosphorus supply/phosphatase/root morphology/phosphorus efficiency分类
农业科技引用本文复制引用
张敏,盛建东,白灯莎·买买提艾力,冯固..不同磷效率棉花根系形态和磷酸酶活性对供磷强度的响应[J].棉花学报,2017,29(3):283-291,9.基金项目
国家自然科学基金(41461051,U1403285) （41461051,U1403285）
