Fruiting-branch removal enhances endotoxin expression and lint yield in Bt cotton

文献类型： 外文期刊

第一作者： Zhang, Dongmei

作者： Zhang, Dongmei;Dong, Hezhong;Li, Weijiang;Tang, Wei

作者机构：

关键词： crop production;species mortality;fiber quality;lint yield;fibre strength;early fruiting-branch removal rate;micronarie

期刊名称：ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE （ 影响因子：1.694； 五年影响因子：1.568 ）

ISSN：

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收录情况： SCI

摘要： A two-year field experiment was conducted to determine the effects of removal of early-fruiting branches (REFB) on yield, quality, and endotoxin expression in transgenic Bt (Bacillus thuringiensis) cotton (Gossypium hirsutum L.). Two early-fruiting branches of field-grown cotton plants were removed and retained at squaring to form the REFB and the control treatments, respectively. Lint yield, yield components, fibre quality, and Cry1Ac protein concentration in the first fully expanded young leaves on the main stem were measured. Results show that lint yields were increased by 5.1 and 5.5% with REFB compared with control in 2004 and 2005, respectively. There was no difference in fibre quality in the first two harvests between REFB and control, but fibre strength and micronarie in the third harvest were improved with REFB. Levels of total N, soluble protein, and Cry1Ac protein as well as glutamic-pyruvic transaminase (GPT) activity in leaves were higher in REFB than in the control. Laboratory bioassay showed significant enhancement of the control efficacy by REFB in terms of Helicoverpa armigera (Hubner) neonate mortality for both years. It is suggested that REFB might be a potential practice for enhancing transgenic Bt cotton production.

分类号： S

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