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中国农学通报 ›› 2009, Vol. 25 ›› Issue (9): 136-139.

所属专题: 生物技术 棉花

• 农学 农业基础科学 • 上一篇    下一篇

草铵膦对棉花根系发育影响及其生理机制

冯艳,张志勇,王清连,韩静,程秀秀   

  • 收稿日期:2009-02-16 修回日期:2009-03-03 出版日期:2009-05-05 发布日期:2009-05-05

Effect of phosphinothricin on growth of cotton seedling roots and its physiological mechanism

  • Received:2009-02-16 Revised:2009-03-03 Online:2009-05-05 Published:2009-05-05

摘要: 草铵膦(Phosphinothricin,PPT)在生产上使用后易在土壤中残留,但其对根系生长发育的影响国内尚无报道。本研究在温室内水培条件下用不同浓度PPT处理棉花幼苗根系,研究PPT对棉花根系发育的影响及其生理机制。结果表明,当PPT浓度为1 mg?L-1时,植株根系的总长度、面积和体积显著减小,随着PPT浓度的上升,棉花根系的总表面积、根长和体积的受抑制程度增大,当处理浓度大于5 mg?L-1时,根系的总表面积、根长和体积的受抑制程度达到最大。随着PPT处理浓度的增加,谷氨酰胺合成酶(glutamine synthetase,GS)的活力也显著下降,从而导致铵积累,这可能是草铵膦抑制根系的生长的重要原因。

关键词: “三农”问题, “三农”问题, 农业信息服务, 营销策略

Abstract: After use of PPT,it is apt to accumulate,but its effect on cotton root growth was not reported at present.Therefore, this paper studied effects of different PPT concentrations on root growth and development under hydroponic cultur in greenhouse. The results showed that the total root surface area,total root length and total root volume significantly decreased when PPT concentration was 1 mg?L-1, to maximum at 5 mg?L-1 concentration of PPT. The activity of glutamine synthetase was reduced significantly as the concentration of PPT rised. It maybe ammonium’s accumulation inhibited root growth , thus decreased the activity of root and glutamine synthetase .