SHORT INTERNODE1 regulates the activity of MADS transcription factors during rice floral organ development

Floral organ identity is fundamental to species diversity and reproductive success in plants and is mainly determined by the combinatorial action of MADS homeotic factors. However, despite their conserved roles in specifying floral organ identity, the regulation of MADS transcription factors remains elusive. Here, we show that the rice (Oryza sativa L.) short internode1 (shi1) mutant displays pleiotropic defects in floral organ development, resulting in severe penalties to yield and grain quality. OsSHI1 mRNA accumulates in each floral organ whorl, and OsSHI1 interacts with multiple MADS transcription factors, especially the Class E members. This physical interaction occurs through the intrinsic MADS domains, thus regulating the transcriptional activity of the MADS transcription factors. This study provides insight into the molecular and genetic regulatory mechanisms underlying the roles of OsSHI1 and MADS transcription factors in rice floral organ development and, consequently, grain yield and quality.

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Publication Details

Journal
PLANT PHYSIOLOGY
Published
2025-02-01
DOI
https://doi.org/10.1093/plphys/kiaf034
Primary Topic
Plant Molecular Biology Research
Type
article
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article

SHORT INTERNODE1 regulates the activity of MADS transcription factors during rice floral organ development

Rushuang Zhang, Chuanwei Gu, Miao Feng, Erchao Duan et al.
PLANT PHYSIOLOGY
Plant Molecular Biology Research
article

SHORT INTERNODE1 regulates the activity of MADS transcription factors during rice floral organ development

Rushuang Zhang, Chuanwei Gu, Miao Feng, Erchao Duan, Ling Jiang, Shijia Liu, Hui Dong, Xuan Teng, Lei Zhou, Jianmin Wan, Xiaoli Chen, Haiyang Wang, Xi Liu, Wenyu Ma, Desheng Zhang, Yihua Wang, Yipeng Zhang, Huan Xu, Qibing Lin, Rongbo Chen, Yuanyan Zhang, Yunlu Tian, Xue Yang
article en

Abstract

Floral organ identity is fundamental to species diversity and reproductive success in plants and is mainly determined by the combinatorial action of MADS homeotic factors. However, despite their conserved roles in specifying floral organ identity, the regulation of MADS transcription factors remains elusive. Here, we show that the rice (Oryza sativa L.) short internode1 (shi1) mutant displays pleiotropic defects in floral organ development, resulting in severe penalties to yield and grain quality. OsSHI1 mRNA accumulates in each floral organ whorl, and OsSHI1 interacts with multiple MADS transcription factors, especially the Class E members. This physical interaction occurs through the intrinsic MADS domains, thus regulating the transcriptional activity of the MADS transcription factors. This study provides insight into the molecular and genetic regulatory mechanisms underlying the roles of OsSHI1 and MADS transcription factors in rice floral organ development and, consequently, grain yield and quality.

PLANT PHYSIOLOGYVol. 197(2)
South China Agricultural University (CN), Nanjing Agricultural University (CN), Chinese Academy of Agricultural Sciences (CN), Ministry of Agriculture and Rural Affairs (CN), Institute of Crop Sciences (CN)
Life in Land
Openalex Percentile: Top 98%
Plant Molecular Biology Research
DOISourceOpenAlex
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