ArticleProceedings of the National Academy of Sciences of the United States of America2000
Rice dwarf mutant d1, which is defective in the alpha subunit of the heterotrimeric G protein, affects gibberellin signal transduction.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2000. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 159 papers.
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159 citing papers in PubMed, 386 citations in OpenAlex.
- Plant G proteins: Versatile signaling hubs for synergistic improvement of agronomic traits.Journal of integrative plant biology · 2026Review
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- Activation of OsOxO2 by T-DNA Insertion Affects Plant Height and Leaf Angle in Rice.Rice (New York, N.Y.) · 2026Article
- Mechanisms behindFrontiers in plant science · 2026Article
- The heterotrimeric G protein γ3 subunit, RGG3/GS3, integrates sugar-starvation and hormone-responsive signaling pathways to promote coleoptile elongation during anaerobic germination in rice.Plant molecular biology · 2025Article
- Genetic, hormonal, and transcriptomic analyses highlight the crucial role of phytohormones in first branch angle regulation in pepper.BMC plant biology · 2025Article
- Comparing hormone dynamics in cereal crops via transient expression of hormone sensors.Plant & cell physiology · 2025Article
- The G-protein γ subunit DEP1 facilitates brassinosteroid signaling in rice via a MYB-bHLH-ARF module.The Plant cell · 2025Article
- The OsMAPK6-OsWRKY72 module positively regulates rice leaf angle through brassinosteroid signals.Plant communications · 2025Article
- Detection of QTLs regulating the second internode length in rice dwarf mutantBreeding science · 2024Article
- Gγ-protein GS3 Function in Tight Genetic Relation with OsmiR396/GS2 to Regulate Grain Size in Rice.Rice (New York, N.Y.) · 2024Article
- When Size Matters: New Insights on How Seed Size Can Contribute to the Early Stages of Plant Development.Plants (Basel, Switzerland) · 2024Review
- Research Progress on Mechanical Strength of Rice Stalks.Plants (Basel, Switzerland) · 2024Review
- Overexpression ofPlants (Basel, Switzerland) · 2024Article
- Oryza CLIMtools: A genome-environment association resource reveals adaptive roles for heterotrimeric G proteins in the regulation of rice agronomic traits.Plant communications · 2024Article
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- RGA1 regulates grain size, rice quality and seed germination in the small and round grain mutant srg5.BMC plant biology · 2024Article
- Article
- GR5 acts in the G protein pathway to regulate grain size in rice.Plant communications · 2024Article
- Oryza CLIMtools: A Genome-Environment Association Resource Reveals Adaptive Roles for Heterotrimeric G Proteins in the Regulation of Rice Agronomic Traits.bioRxiv : the preprint server for biology · 2023Article
99 more citing papers are in PubMed but not listed here.
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7 authors at 2 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Previously, we reported that the rice dwarf mutant, d1, is defective in the alpha subunit of the heterotrimeric G protein (Galpha). In the present study, gibberellin (GA) signaling in d1 and the role of the Galpha protein in the GA-signaling pathway were investigated. Compared with the wild type, GA induction of alpha-amylase activity in aleurone cells of d1 was greatly reduced. Relative to the wild type, the GA(3)-treated aleurone layer of d1 had lower expression of Ramy1A, which encodes alpha-amylase, and OsGAMYB, which encodes a GA-inducible transcriptional factor, and no increase in expression of Ca(2 +)-ATPase. However, in the presence of high GA concentrations, alpha-amylase induction occurred even in d1. The GA sensitivity of second leaf sheath elongation in d1 was similar to that of the wild type in terms of dose responsiveness, but the response of internode elongation to GA was much lower in d1. Furthermore, Os20ox expression was up-regulated, and the GA content was elevated in the stunted internodes of d1. All these results suggest that d1 affects a part of the GA-signaling pathway, namely the induction of alpha-amylase in the aleurone layer and internode elongation. In addition, a double mutant between d1 and another GA-signaling mutant, slr, revealed that SLR is epistatic to the D1, supporting that the Galpha protein is involved in GA signaling. However, the data also provide evidence for the presence of an alternative GA-signaling pathway that does not involve the Galpha protein. It is proposed that GA signaling via the Galpha protein may be more sensitive than that of the alternative pathway, as indicated by the low GA responsiveness of this Galpha-independent pathway.
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