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XTBG OpenIR  > 2012年后新成立研究组  > 期刊论文

title: Involvement of reactive oxygen species in lanthanum-induced inhibition of primary root growth
author: Yang-Yang Liu;  Ru-Ling Wang;  Ping Zhang;  Liang-liang Sun;  Jin Xu
Issued Date: 2016
Abstract: Although lanthanum (La) has been used as an agricultural plant growth stimulant for approximately 50 years, high concentrations are toxic to plants. Despite significant advances in recent years, the mechanisms underlying the effects of La on root system development remain unclear. Here, we report that a high concentration of La inhibits primary root (PR) elongation and induces lateral root (LR) development. La results in cell death in PR tips, thereby leading to the loss of meristematic cell division potential, stem cell niche activity, and auxin distribution in PR tips. Further analysis indicated that La induces reactive oxygen species (ROS) over-accumulation in PR tips. Reduction in ROS accumulation partially alleviated the inhibitory effects of La on PR elongation by improving cell survival in PR tips and thereby improving meristematic cell division potential and auxin distribution in PR tips. We also found ROS to be involved in La-induced endocytosis. Genetic analyses supported the described phenotype. Overall, our results indicate that La affects root growth, at least partially, by modulating ROS levels in roots to induce cell death in PR tips and subsequent auxin redistribution in roots, leading to remodeling of the root system architecture.
Source: Journal of Experimental Botany
Appears in Collections:2012年后新成立研究组_期刊论文

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Recommended Citation:
Yang-Yang Liu,Ru-Ling Wang,Ping Zhang,et al. Involvement Of Reactive Oxygen Species In Lanthanum-induced Inhibition Of Primary Root Growth[J]. Journal Of Experimental Botany,2016,67(21):6149-6159.

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