Clock component OsPRR73 positively regulates rice salt tolerance by modulating OsHKT2;1-mediated sodium homeostasis

ABSTRACT: The roles of clock components in salt stress tolerance remain incompletely characterized in rice. Here we show that, among OsPRR (Oryza sativa Pseudo-Response Regulator) family members, OsPRR73 specifically confers salt tolerance in rice. Notably, the grain size and yield of osprr73 null mutants were significantly decreased in the presence of salt stress, with accumulated higher level of reactive oxygen species and sodium ions. RNA-sequencing and biochemical assays identified OsHKT2;1, encoding a plasma-membrane localized Na+ transporter, as a transcriptional target of OsPRR73 in mediating salt tolerance. Correspondingly, null mutants of OsHKT2;1 displayed an increased tolerance to salt stress. Immunoprecipitation-mass spectrometry (IP-MS) assays further identified HDAC10 as nuclear intera

SUBMITTER: Hua Wei 

PROVIDER: S-SCDT-EMBOJ-2020-105086 | biostudies-other |

REPOSITORIES: biostudies-other