Plant Mol Biol (2017) 93:327–340 DOI 10.1007/s11103-016-0564-6 Phosphate starvation induced OsPHR4 mediates Pi-signaling and homeostasis in rice 1 1 2 1 Wenyuan Ruan · Meina Guo · Ping Wu · Keke Yi Received: 6 July 2016 / Accepted: 14 November 2016 / Published online: 23 November 2016 © Springer Science+Business Media Dordrecht 2016 Abstract expresses in vascular tissues through all growth and devel- Key message OsPHR4 mediates the regulation of Pi- opment periods. The expression of OsPHR4 is positively starvation signaling and Pi-homeostasis in a PHR1-sub- regulated by OsPHR1, OsPHR2 and OsPHR3. The nuclear family dependent manner in rice. located OsPHR4 can respectively interact with other three Abstract Phosphate (Pi) starvation response is a sophisti- PHR1 subfamily members to regulate downstream Pi-starva- cated process for plant in the natural environment. In this pro- tion induced genes. Consistent with the positive role of PHR4 cess, PHOSPHATE STARVATION RESPONSE 1 (PHR1) in regulating Pi-starvation signaling, the OsPHR4 overexpres- subfamily genes play a central role in regulating Pi-starva- sors display higher Pi accumulation in the shoot and elevated tion signaling and Pi-homeostasis. Besides the three PHR1 expression of Pi-starvation induced genes under Pi-sufficient orthologs in Oryza sativa L. (Os) [(Os) PHR1, (Os) PHR2, condition. Besides, moderate growth
Plant Molecular Biology – Springer Journals
Published: Nov 23, 2016
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