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The research aims to investigate the role of OsARF9 in regulating rice plant architecture and seed germination.

February 21, 2026The Crop JournalOpen Access

OsARF9 integrates auxin-BR-ABA signaling to regulate plant architecture and seed germination in rice

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Experimental analysis uncovers OsARF9's role in regulating plant architecture and seed germination, indicating vital interactions in rice.

The research aims to investigate the role of OsARF9 in regulating rice plant architecture and seed germination.
Analyzed transgenic lines of OsARF9 for phenotypic characterization.
Conducted hormone response assays to assess plant responses to auxin, BR, and ABA.
Performed promoter binding studies to investigate OsARF9 interactions with target genes.
OsARF9 functions as a transcriptional repressor affecting architecture and seed germination traits.
Transgenic lines displayed genotype-dependent responses to hormone treatments.
OsARF9 directly represses transcription of OsGH3-5, OsRLA1, OsABI3, and OsEm1.

Fan et al. (2026) studied this question.

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Experimental analysis uncovers OsARF9's role in regulating plant architecture and seed germination, indicating vital interactions in rice.