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The Synthesis of Ascorbic Acid in Rice Roots Plays an Important Role in the Salt Tolerance of Rice by Scavenging ROS.


ABSTRACT: The root plays an important role in the responses of plants to stresses, but the detailed mechanisms of roots in stress responses are still obscure. The GDP-mannose pyrophosphate synthetase (GMPase) OsVTC1-3 is a key factor of ascorbic acid (AsA) synthesis in rice roots. The present study showed that the transcript of OsVTC1-3 was induced by salt stress in roots, but not in leaves. Inhibiting the expression of OsVTC1-3 by RNA interfering (RI) technology significantly impaired the tolerance of rice to salt stress. The roots of OsVTC1-3 RI plants rapidly produced more O?-, and later accumulated amounts of H?O? under salt stress, indicating the impaired tolerance of OsVTC1-3 RI plants to salt stress due to the decreasing ability of scavenging reactive oxygen species (ROS). Moreover, exogenous AsA restored the salt tolerance of OsVTC1-3 RI plants, indicating that the AsA synthesis in rice roots is an important factor for the response of rice to salt stress. Further studies showed that the salt-induced AsA synthesis was limited in the roots of OsVTC1-3 RI plants. The above results showed that specifically regulating AsA synthesis to scavenge ROS in rice roots was one of important factors in enhancing the tolerance of rice to salt stress.

SUBMITTER: Wang Y 

PROVIDER: S-EPMC6275051 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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The Synthesis of Ascorbic Acid in Rice Roots Plays an Important Role in the Salt Tolerance of Rice by Scavenging ROS.

Wang Yayun Y   Zhao Hui H   Qin Hua H   Li Zixuan Z   Liu Hai H   Wang Juan J   Zhang Haiwen H   Quan Ruidang R   Huang Rongfeng R   Zhang Zhijin Z  

International journal of molecular sciences 20181026 11


The root plays an important role in the responses of plants to stresses, but the detailed mechanisms of roots in stress responses are still obscure. The GDP-mannose pyrophosphate synthetase (GMPase) <i>OsVTC1-3</i> is a key factor of ascorbic acid (AsA) synthesis in rice roots. The present study showed that the transcript of <i>OsVTC1-3</i> was induced by salt stress in roots, but not in leaves. Inhibiting the expression of <i>OsVTC1-3</i> by RNA interfering (RI) technology significantly impaire  ...[more]

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