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On-line Access: 2011-06-07

Received: 2010-09-15

Revision Accepted: 2011-01-04

Crosschecked: 2011-04-28

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Journal of Zhejiang University SCIENCE B 2011 Vol.12 No.6 P.477-484

http://doi.org/10.1631/jzus.B1000335


Ammonium affects cell viability to inhibit root growth in Arabidopsis


Author(s):  Cheng Qin, Ke-ke Yi, Ping Wu

Affiliation(s):  State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Corresponding email(s):   clspwu@zju.edu.cn

Key Words:  Ammonium toxicity, Root, Cell viability, GDP-mannose pyrophosphorylase, ArabidopsisThe online version of this article contains supplementary materials


Cheng Qin, Ke-ke Yi, Ping Wu. Ammonium affects cell viability to inhibit root growth in Arabidopsis[J]. Journal of Zhejiang University Science B, 2011, 12(6): 477-484.

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T1 - Ammonium affects cell viability to inhibit root growth in Arabidopsis
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DOI - 10.1631/jzus.B1000335


Abstract: 
Ammonium (NH4+) is an important form of nitrogen nutrient for most plants, yet is also a stressor for many of them. However, the primary events of NH4+ toxicity at the cellular level are still unclear. Here, we showed that NH4+ 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 NH4+-hypersensitive mutant hsn1 further confirmed our findings. Taken together, NH4+ toxicity inhibits primary root growth by inhibiting cell elongation and division and inducing root cell death.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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