Ammonium affects cell viability to inhibit root growth in Arabidopsis

文献类型： 外文期刊

第一作者： Qin, Cheng

作者： Qin, Cheng;Wu, Ping;Yi, Ke-ke

作者机构：

关键词： Ammonium toxicity;Root;Cell viability;GDP-mannose pyrophosphorylase;Arabidopsis

期刊名称：JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE B （ 影响因子：3.066； 五年影响因子：3.057 ）

ISSN： 1673-1581

年卷期： 2011 年 12 卷 6 期

页码：

收录情况： SCI

摘要： Ammonium (NH(4) (+)) is an important form of nitrogen nutrient for most plants, yet is also a stressor for many of them. However, the primary events of NH(4) (+) toxicity at the cellular level are still unclear. Here, we showed that NH(4) (+) toxicity can induce the root cell death in a temporal pattern which primarily occurs in the cells of root maturation and elongation zones, and then spreads to the cells in the meristem and root cap. The results from the NH(4) (+)-hypersensitive mutant hsn1 further confirmed our findings. Taken together, NH(4) (+) toxicity inhibits primary root growth by inhibiting cell elongation and division and inducing root cell death.

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