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Response of the enzymes to nitrogen applications in cotton fiber (Gossypium hirsutum L.) and their relationships with fiber strength

文献类型: 外文期刊

作者: Wang YouHua 1 ; Feng Ying 1 ; Xu NaiYin 1 ; Chen BingLin 1 ; Ma RongHui 1 ; Zhou ZhiGuo 1 ;

作者机构: 1.Nanjing Agr Univ, Minist Agr, Key Lab Crop Growth Regulat, Nanjing 210095, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Peoples R China

关键词: cotton (Gossypium hirsutum L.);nitrogen;fiber development;enzyme activity;gene expression;fiber strength

期刊名称:SCIENCE IN CHINA SERIES C-LIFE SCIENCES ( 影响因子:1.61; 五年影响因子:1.148 )

ISSN: 1006-9305

年卷期: 2009 年 52 卷 11 期

页码:

收录情况: SCI

摘要: To investigate the response of key enzymes to nitrogen (N) rates in cotton fiber and its relationship with fiber strength, experiments were conducted in 2005 and 2006 with cotton cultivars in Nanjing. Three N rates 0, 240 and 480 kgN/hm(2), signifying optimum and excessive nitrogen application levels were applied. The activities and the gene expressions of the key enzymes were affected by N, and the characteristics of cellulose accumulation and fiber strength changed as the N rate varied. Beta-1,3-glucanase activity in cotton fiber declined from 9 DPA till boll opening, and the beta-1, 3-glucanase coding gene expression also followed a unimodal curve in 12-24 DPA. In 240 kgN/hm(2) condition, the characteristics of enzyme activity and gene expression manner for sucrose synthase and beta-1,3-glucanase in developing cotton fiber were more favorable for forming a longer and more steady cellulose accumulation process, and for high strength fiber development.

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