Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (11): 2329-2339.DOI: 10.3969/j.issn.1004-1524.2022.11.02

• Crop Science • Previous Articles     Next Articles

Functional analysis of plastid phosphate transporter OsPPT family members in rice

WANG Jichun1(), LI Ruili2, WANG Jiaoling3, SHAO Junwen1, ZHAO Hongyu2,*()   

  1. 1. College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
    2. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100098, China
    3. College of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang 473061, Henan, China
  • Received:2022-04-20 Online:2022-11-25 Published:2022-11-29
  • Contact: ZHAO Hongyu

Abstract:

The phosphoenolpyruvate/phosphate transporter (PPT) is a member of plant plastid phosphate transporter family (pPTs), which transports phosphoenolpyruvate (PEP) in cytoplasm into the plastid and exchanges phosphate to cytoplasm. To comprehensively analyze the OsPPT gene family and explore its potential function in rice, subcellular localization of OsPPT proteins were clarified by transient transformation of rice protoplasts, and the phosphate transport capacity of OsPPT were analyzed by yeast heterologous expression experiments. The tissue specific expression patterns of OsPPT gene family and their responses to abiotic stress were analyzed by setting up hydroponic experimental treatments such as normal phosphorus supply, phosphorus deficiency and abiotic stress. The results showed that all four members of the OsPPT gene family were localized to the chloroplast membrane and OsPPTs could mediate phosphate transport across the membrane in yeast. In addition, dynamic transcriptional changes determined by qRT-PCR revealed differential expression profiles of OsPPTs in response to environmental stress, such as phosphorus starvation and abscisic acid (ABA), salicylic acid (SA), NaCl stress The OsPPT gene family might be involved in the transportation of phosphate between cytoplasm and chloroplasts, and might also participate in the response of plants to stress.

Key words: plastids, phosphate, phosphorus transporter protein, phosphoenolpyruvate/phosphate transporter (PPT)

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