Ammonium-induced loss of root gravitropism is related to auxin distribution and TRH1 function,and is uncoupled from the inhibition of root elongation in Arabidopsis

摘要：

　　Root gravitropism is affected by many environmental stresses,including salinity,drought,and nutrient deficiency.One significant environmental stress,excess ammonium (NH4+),is well-documented to inhibit root elongation and lateral root formation,yet little is known about its effects on the direction of root growth.We show here that inhibition of root elongation upon elevation of external NH4+ is accompanied by a loss in root gravitropism (agravitropism) in Arabidopsis.Addition of potassium (K+) to the treatment medium partially rescued the inhibition of root elongation by high NH4+ but did not improve gravitropic root curvature.

作者: Na Zou Baohai Li Gangqiang Dong Herbert J.Kronzucker Weiming Shi

作者单位: State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy o Department of Biological Sciences,University of Toronto,1265 Military Trail,Toronto,Ontario,M1C 1A4,

会议类型: 国内会议

会议名称: 江苏省植物生理第三届青年学术年会

会议地点: 南京

会议语种:英文

页码: 44-44

在线出版日期: 2012-10-28（万方平台首次上网日期，不代表论文的发表时间）