NDLI: MAPKs regulate root growth by influencing auxin signaling and cell cycle-related gene expression in cadmium-stressed rice.

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MAPKs regulate root growth by influencing auxin signaling and cell cycle-related gene expression in cadmium-stressed rice.

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MAPKs regulate root growth by influencing auxin signaling and cell cycle-related gene expression in cadmium-stressed rice.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Zhao, Feng Yun Hu, Fan Wang, Kai Zhang, Cheng Ren Liu, Tao Zhang, Shi Yong
Description	Author Affiliation: Zhao FY ( College of Life Sciences, Shandong University of Technology, Zibo, 255049, Shandong Province, People's Republic of China. zhaofengyun@sdut.edu.cn)
Abstract	This work aims to analyze the relationship between root growth, mitogen-activated protein kinase (MAPK), auxin signaling, and cell cycle-related gene expression in cadmium (Cd)-stressed rice. The role of MAPKs in auxin signal modification and cell cycle-related gene expression during root growth was investigated by disrupting MAPK signaling using the MAPKK inhibitor PD98059 (PD). Treatment with Cd caused a significant accumulation of Cd in the roots. A Cd-specific probe showed that Cd is mainly localized in the meristematic zone and vascular tissues. Perturbation of MAPK signaling using PD significantly suppressed root system growth under Cd stress. The transcription of six MAPK genes was inhibited by Cd compared to the control. Detection using DR5-GUS transgenic rice showed that the intensity and distribution pattern of GUS staining was similar in roots treated with PD or Cd, whereas in Cd plus PD-treated roots, the GUS staining pattern was similar to that of the control, which indicates a close association of MAPK signaling with auxin homeostasis under control and Cd stress conditions. The expression of most key genes of auxin signaling, including OsYUCCA, OsPIN, OsARF, and OsIAA, and of most cell cycle-related genes, was negatively regulated by MAPKs under Cd stress. These results suggest that the MAPK pathway plays specific roles in auxin signal transduction and in the control of the cell cycle in response to Cd stress. Altogether, MAPKs take part in the regulation of root growth via auxin signal variation and the modified expression of cell cycle-related genes in Cd-stressed rice. A working model for the function of MAPKs in rice root systems grown under Cd stress is proposed.
ISSN	09441344
Issue Number	8
Volume Number	20
e-ISSN	16147499
Journal	Environmental Science and Pollution Research
Language	English
Publisher	Springer
Publisher Date	2013-08-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cadmium Toxicity Gene Expression Regulation, Plant Physiology Genes, Cdc Genetics Indoleacetic Acids Metabolism Mitogen-activated Protein Kinases Oryza Sativa Growth & Development Flavonoids Pharmacology Genes, Plant Antagonists & Inhibitors Drug Effects Plant Roots Plant Shoots Protein Kinase Inhibitors Signal Transduction Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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