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THERMOSENSITIVE BARREN PANICLE (TAP) is required for rice panicle and spikelet development at high ambient temperature

文献类型： 外文期刊

作者： Zhang, Peng 1 ; Zhu, Wanwan 1 ; He, Yi 1 ; Fan, Junyi 1 ; Shi, Jin 1 ; Fu, Ruifeng 1 ; Hu, Jianping 2 ; Li, Li 4 ; Zhang, Dabing 1 ; Liang, Wanqi 1 ;

作者机构： 1.Shanghai Jiao Tong Univ, Sch Life Sci & Biotechnol, Joint Int Res Lab Metab & Dev Sci, State Key Lab Hybrid Rice, Shanghai 20040, Peoples R China

2.Michigan State Univ, Dept Energy Plant Res Lab, E Lansing, MI 48824 USA

3.Michigan State Univ, Plant Biol Dept, E Lansing, MI 48824 USA

4.Hunan Acad Agr Sci, Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China

关键词： FAR1-RELATED SEQUENCE protein; high ambient temperature; OsYABBY; panicle; rice (Oryza sativa); spikelet

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.323； 五年影响因子：10.768 ）

ISSN： 0028-646X

年卷期：

页码：

收录情况： SCI

摘要： In cereal plants, the size of the panicle (inflorescence) is a critical factor for yield. Panicle size is determined by a complex interplay of genetic and environmental factors, but the mechanisms underlying adaptations to temperature stress during panicle development remain largely unknown. We identify the rice THERMOSENSITIVE BARREN PANICLE (TAP) gene, which encodes a transposase-derived FAR1-RELATED SEQUENCE (FRS) protein and is responsible for regulating panicle and spikelet development at high ambient temperature. The tap mutants display high temperature-dependent reproductive abnormalities, including compromised secondary branch and spikelet initiation and pleiotropic floral organ defects. Consistent with its thermosensitive phenotype, TAP expression is induced by high temperature. TAP directly promotes the expression of OsYABBY3 (OsYAB3), OsYAB4, and OsYAB5, which encode key transcriptional regulators in panicle and spikelet development. In addition, TAP physically interacts with OsYAB4 and OsYAB5 proteins; phenotypic analysis of osyab4 tap-1 and osyab5 tap-1 double mutants indicates that TAP-OsYAB4/OsYAB5 complexes act to maintain normal panicle and spikelet development. Taken together, our study reveals the novel role of a TE-derived transcription factor in controlling rice panicle development under high ambient temperatures, shedding light on the molecular mechanism underlying the adaptation of cereal crops to increasing environmental temperatures.

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