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OsProT1 and OsProT3 Function to Mediate Proline- and ?-aminobutyric acid-specific Transport in Yeast and are Differentially Expressed in Rice (Oryza sativa L.).


ABSTRACT: BACKGROUND:Proline (Pro) and ?-aminobutyric acid (GABA) play important roles in plant development and stress tolerance. However, the molecular components responsible for the transport of these molecules in rice remain largely unknown. RESULTS:Here we identified OsProT1 and OsProT3 as functional transporters for Pro and GABA. Transient expression of eGFP-OsProTs in plant protoplasts revealed that both OsProT1 and OsProT3 are localized to the plasma membrane. Ectopic expression in a yeast mutant demonstrated that both OsProT1 and OsProT3 specifically mediate transport of Pro and GABA with affinity for Pro in the low affinity range. qRT-PCR analyses suggested that OsProT1 was preferentially expressed in leaf sheathes during vegetative growth, while OsProT3 exhibited relatively high expression levels in several tissues, including nodes, panicles and roots. Interestingly, both OsProT1 and OsProT3 were induced by cadmium stress in rice shoots. CONCLUSIONS:Our results suggested that plasma membrane-localized OsProT1 and OsProT3 efficiently transport Pro and GABA when ectopically expressed in yeast and appear to be involved in various physiological processes, including adaption to cadmium stress in rice plants.

SUBMITTER: Lin JH 

PROVIDER: S-EPMC6842372 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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OsProT1 and OsProT3 Function to Mediate Proline- and γ-aminobutyric acid-specific Transport in Yeast and are Differentially Expressed in Rice (Oryza sativa L.).

Lin Jin-Hong JH   Xu Zhi-Jun ZJ   Peng Jia-Shi JS   Zhao Jing J   Zhang Guo-Bin GB   Xie Jun J   Yi Zhen-Xie ZX   Zhang Jian-Hua JH   Gong Ji-Ming JM   Ye Neng-Hui NH   Meng Shuan S  

Rice (New York, N.Y.) 20191109 1


<h4>Background</h4>Proline (Pro) and γ-aminobutyric acid (GABA) play important roles in plant development and stress tolerance. However, the molecular components responsible for the transport of these molecules in rice remain largely unknown.<h4>Results</h4>Here we identified OsProT1 and OsProT3 as functional transporters for Pro and GABA. Transient expression of eGFP-OsProTs in plant protoplasts revealed that both OsProT1 and OsProT3 are localized to the plasma membrane. Ectopic expression in a  ...[more]

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