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Involvement of reactive oxygen species in lanthanum-induced inhibition of primary root growth
Yang-Yang Liu; Ru-Ling Wang; Ping Zhang; Liang-liang Sun; Jin Xu
2016
Source PublicationJournal of Experimental Botany
Volume67Issue:21Pages:6149-6159
AbstractAlthough 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.
KeywordArabidopsis Lanthanum Primary Root Growth Reactive Oxygen Species Root System Architecture.
Language英语
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/10403
Collection2012年后新成立研究组
Recommended Citation
GB/T 7714
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.
APA Yang-Yang Liu,Ru-Ling Wang,Ping Zhang,Liang-liang Sun,&Jin Xu.(2016).Involvement of reactive oxygen species in lanthanum-induced inhibition of primary root growth.Journal of Experimental Botany,67(21),6149-6159.
MLA Yang-Yang Liu,et al."Involvement of reactive oxygen species in lanthanum-induced inhibition of primary root growth".Journal of Experimental Botany 67.21(2016):6149-6159.
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