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Reference Detail
| Reference | ||
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| Author | Liu S., Wu J., Mawia A.M., Wei X., Cao R., Jiao G., Wu Y., Zhang J., Xie L., Sheng Z., Hu S., Li S., Lv Y., Lu F., Chen Y., Fiaz S., Tabassum J., Du Z., Gao F., Ren G., Shao G., Hu P., Tang S. | |
| Title | A novel transcription factor OsMYB73 affects grain size and chalkiness by regulating endosperm storage substances' accumulation-mediated auxin biosynthesis signalling pathway in rice. | |
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Abstract: Enhanced grain yield and quality traits are everlasting breeding goals. It is therefore of great significance to uncover more genetic resources associated with these two important agronomic traits. Plant MYB family transcription factors play important regulatory roles in diverse biological processes. However, studies on genetic functions of MYB in rice yield and quality are rarely to be reported. Here, we investigated a nucleus-localized transcription factor OsMYB73 which is preferentially expressed in the early developing pericarp and endosperm. We generated targeted mutagenesis of OsMYB73 in rice, and the mutants had longer grains with obvious white-belly chalky endosperm appearance phenotype. The mutants displayed various changes in starch physicochemical characteristics and lipid components. Transcriptome sequencing analysis showed that OsMYB73 was chiefly involved in cell wall development and starch metabolism. OsMYB73 mutation affects the expression of genes related to grain size, starch and lipid biosynthesis and auxin biosynthesis. Moreover, inactivation of OsMYB73 triggers broad changes in secondary metabolites. We speculate that rice OsMYB73 and OsNF-YB1 play synergistic pivotal role in simultaneously as transcription activators to regulate grain filling and storage compounds accumulation to affect endosperm development and grain chalkiness through binding OsISA2, OsLTPL36 and OsYUC11. The study provides important germplasm resources and theoretical basis for genetic improvement of rice yield and quality. In addition, we enriches the potential biological functions of rice MYB family transcription factors. |
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| Journal | Plant Biotechnol. J. | |
| Country | China | |
| Volume | 23(4) | |
| Pages | 1021-1038 | |
| Year | 2025 | |
| PubMed ID | 39726220 | |
| PubMed Central ID | 11933829 | |
| DOI | 10.1111/pbi.14558 | |
| URL | - | |
| Relation | ||
| Gene | DLN29 HAP3K ISA2 LTPL36 YUCCA11 | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
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Lethal Embryo Mutantion Strain |
- | |
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Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
