OsPHR2 Is Involved in Phosphate-Starvation Signaling and Excessive Phosphate Accumulation in Shoots of Plants

    February 2008 in “ PLANT PHYSIOLOGY ”
    Jie Zhou, FangChang Jiao, Zhongchang Wu, Yiyi Li, Xüming Wang, Xiaowei He, Weiqi Zhong, Ping Wu
    Studysummary This study found that overexpression of OsPHR2 in rice leads to increased phosphate accumulation and root architecture changes even under phosphate-sufficient conditions. Our plain-language summary of this paper — not a Tressless recommendation.
    The study explored the role of the OsPHR2 gene in phosphate (Pi) starvation signaling and accumulation in rice plants. Overexpression of OsPHR2 led to excessive Pi accumulation in shoots, causing toxicity symptoms such as smaller plant size and reduced biomass under high Pi conditions. This overexpression also enhanced root elongation and root hair growth, indicating a role in altering root architecture. OsPHR2 upregulated several Pi transporters, particularly OsPT9, contributing to increased Pi translocation into shoots. The findings highlighted OsPHR2's significant role in regulating Pi homeostasis and response to Pi availability, offering insights for developing plants with improved Pi uptake efficiency.
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