ArticleRice (New York, N.Y.)2024
Indole-3-Acetic Acid (IAA) and Sugar Mediate Endosperm Development in Rice (Oryza sativa L.).
Article in Rice (New York, N.Y.), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Alternating Wetting and Drying Irrigation During Grain Filling Period Improves the Eating Quality and 2AP Content of Aromatic Rice.Plants (Basel, Switzerland) · 2026Article
- Duet between sugars and hormones: The molecular dialogue fine-tuning hypoxia acclimation in plants.Journal of integrative plant biology · 2026Review
- Phosphorus starvation-responsive factor OsWRKY74 promotes starch accumulation during rice grain filling under low phosphorus conditions by regulating OsSWEET11.Plant cell reports · 2026Article
- Mechanized wide narrow row densification configuration enhances japonica rice yield and head rice quality in Northern China.Frontiers in plant science · 2026Article
- The role of endogenous hormones in regulating grain number in oat panicles under drought stress across cultivars.Frontiers in plant science · 2026Article
- From Leaves to Roots: How Foliar IAA Application Alters Fungal Network in the Rhizosphere and Endosphere of Eucommia ulmoides.Current microbiology · 2025Article
- The miR395b-ABI5 module regulates amylopectin branching and biosynthesis and affects lotus root quality.Plant physiology · 2025Article
- A novel transcription factor OsMYB73 affects grain size and chalkiness by regulating endosperm storage substances' accumulation-mediated auxin biosynthesis signalling pathway in rice.Plant biotechnology journal · 2025Article
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5 authors.
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Abstract
The yield potential of large-panicle rice is often limited by grain-filling barriers caused by the development of inferior spikelets (IS). Photoassimilates, which are the main source of rice grain filling, mainly enter the caryopsis through the dorsal vascular bundle. The distribution of assimilates between superior spikelets (SS) and IS is influenced by auxin-mediated apical dominance; however, the mechanism involved is still unclear. In this study, the effect of auxin signaling on the grain filling of SS and IS was investigated in two large-panicle japonica rice varieties, W1844 and CJ03. Compared to SS, IS displayed delayed initiation of filling and a significantly lower grain weight. Furthermore, the endosperm development in IS remained stagnant at the coenocytic stage. The development of the dorsal vascular bundle in the IS was also slow, and poor sucrose-unloading was observed during the initial grain filling stage. However, the endosperm development in IS immediately started after the improvement of dorsal vascular bundle development. GUS activity staining further revealed that indole-3-acetic (IAA) was localized in the dorsal vascular bundle and surrounding areas, suggesting that the low IAA content observed in the IS during the initial grain filling stage may have delayed the development of the dorsal vascular bundle. Therefore, these results demonstrate that IAA may control sugar transport and unloading by regulating dorsal vascular bundle development, consequently affecting endosperm development in IS.
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