ArticlePlant biotechnology journal2023
Sugar starvation activates the OsSnRK1a-OsbHLH111/OsSGI1-OsTPP7 module to mediate growth inhibition of rice.
Article in Plant biotechnology journal, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Review
- Transcriptome Analysis IdentifiesPlants (Basel, Switzerland) · 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
- A multi-layered regulatory model uncovers the central role of OsPRR37 in coordinating multiple agronomic traits.BMC plant biology · 2025Article
- Genome-Wide Analysis of Trehalose-6-Phosphate Phosphatases (TPP) Gene Family in Potato (Plants (Basel, Switzerland) · 2025Article
- bHLH Transcription Factors in Cereal Crops: Diverse Functions in Regulating Growth, Development and Stress Responses.International journal of molecular sciences · 2025Review
- The ILR3-NRTs/NIA1/SWEET12 module regulates nitrogen uptake and utilization in apple.Molecular horticulture · 2025Article
- Climate Adaptation Strategies for Maintaining Rice Grain Quality in Temperate Regions.Biology · 2025Review
- Genomic signatures of SnRKs highlighted conserved evolution within orchids and stress responses through ABA signaling in the Cymbidium ensifolium.BMC plant biology · 2025Article
- Epitranscriptome profiles reveal participation of the RNA methyltransferase gene OsMTA1 in rice seed germination and salt stress response.BMC plant biology · 2025Article
- Mapping of quantitative trait loci for early seed germination using whole-genome resequencing chromosome segment substitution lines of aus Kasalath in the background of japonica Nipponbare.Frontiers in plant science · 2025Article
- The rice SnRK family: biological roles and cell signaling modules.Frontiers in plant science · 2023Review
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sugar deficiency is the persistent challenge for plants during development. Trehalose-6-phosphate (T6P) is recognized as a key regulator in balancing plant sugar homeostasis. However, the underlying mechanisms by which sugar starvation limits plant development are unclear. Here, a basic helix-loop-helix (bHLH) transcription factor (OsbHLH111) was named starvation-associated growth inhibitor 1 (OsSGI1) and the focus is on the sugar shortage of rice. The transcript and protein levels of OsSGI1 were markedly increased during sugar starvation. The knockout mutants sgi1-1/2/3 exhibited increased grain size and promoted seed germination and vegetative growth, which were opposite to those of overexpression lines. The direct binding of OsSGI1 to sucrose non-fermenting-1 (SNF1)-related protein kinase 1a (OsSnRK1a) was enhanced during sugar shortage. Subsequently, OsSnRK1a-dependent phosphorylation of OsSGI1 enhanced the direct binding to the E-box of trehalose 6-phosphate phosphatase 7 (OsTPP7) promoter, thus rose the transcription inhibition on OsTPP7, then elevated trehalose 6-phosphate (Tre6P) content but decreased sucrose content. Meanwhile, OsSnRK1a degraded phosphorylated-OsSGI1 by proteasome pathway to prevent the cumulative toxicity of OsSGI1. Overall, we established the OsSGI1-OsTPP7-Tre6P loop with OsSnRK1a as center and OsSGI1 as forward, which is activated by sugar starvation to regulate sugar homeostasis and thus inhibits rice growth.
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