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Identification of up-regulated genes provides integrated insight into salt-induced tolerance mechanisms in Sesuvium portulacastrum roots

文献类型： 外文期刊

作者： Fan, Wei 1 ; Chang, Wenjun 2 ; Liu, Xiwen 2 ; Xiao, Chuan 4 ; Yang, Jianli 5 ; Zhang, Zhili 2 ;

作者机构： 1.Yunnan Agr Univ, Coll Resources & Environm, Kunming 650201, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Key Lab, Minist Agr Trop Biotechnol, Haikou 571101, Peoples R China

3.Hainan Acad Agr Sci, Haikou 571100, Peoples R China

4.Huazhong Univ Sci & Technol, Inst Resource Biol & Biotechnol, Dept Biotechnol, Coll Life Sci & Technol, Wuhan 430074, Peoples R China

5.Zhejiang Univ, State Key Lab Plant Physiol & Biochem, Coll Life Sci, Hangzhou 310058, Zhejiang, Peoples R China

关键词： Sesuvium portulacastrum;Suppression subtractive hybridization;mRNA differential expression profiles;Salt tolerance

期刊名称：ACTA PHYSIOLOGIAE PLANTARUM （ 影响因子：2.354； 五年影响因子：2.711 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Sesuvium portulacastrum, a promising facultative halophyte species, has a remarkable ability to survival at severe salt of similar to 1000 mM NaCl. However, genes encoding proteins involved in the process of salt tolerance in S. portulacastrum are limited. In this study, suppression subtractive hybridization together with reverse northern blot analysis and RT-PCR was used to identify up-regulated genes in roots after treatment with seawater for 2-24 h. We identified a total of 148 unigenes, and most of these genes were predominantly associated with 'signal transduction and transcription', 'stress/defense response', 'transport' and 'metabolism'. Comparative analysis between physiological response and differentially expressed genes highlighted that sodium (Na+) transport, compartmentation, reactive oxygen species (ROS) scavenging, and sugar-metabolizing regulation play important roles in salt tolerance of S. portulacastrum, whereas inhibition of root elongation induced by high salinity may be related to lignin deposition and disruption of calcium homeostasis.

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