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Background  Phosphate (Pi), an essential mineral nutrient for plant development and reproduction, is one of the main components of fertilizers in modern agriculture. Previous research demonstrated that AtNLA1 mediates ubiquitination of Pi transporters in the plasma membrane and triggers their endocytosis and degradation in Arabidopsis. In this study, we researched the function of NLA homologous proteins in Pi homeostasis in rice.    Findings  Two  OsNLA  homologs from rice ( Oryza sativa  L.) were identified by bioinformatics and phylogenetic analysis and designated  OsNLA1  and  OsNLA2 . The  OsNLA1  clustered with Arabidopsis  AtNLA1 , was expressed higher than  OsNLA2  and was transcriptionally repressed under Pi-deficient condition. Loss-of-function of  OsNLA1  caused P overaccumulation and growth inhibitions in both root and shoot under Pi-sufficient condition. Furthermore, mutation of  OsNLA1  affected expression of Pi tranporters and root hair development under Pi-sufficient and/or Pi-deficient conditions.    Conclusions    OsNLA1  plays a key role in maintaining phosphate homeostasis in rice.    Electronic supplementary material  The online version of this article (10.1186/s12284-017-0193-y) contains supplementary material, which is available to authorized users.

Characterization of the rice NLA family reveals a key role for OsNLA1 in phosphate homeostasis