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Reference Detail
| Reference | ||
|---|---|---|
| Author | Hu X., Yu P., Zhang Y., Gao Z., Sun B., Wu W., Deng C., Abbas A., Hong Y., Sun L., Liu Q., Xue P., Wang B., Zhan X., Cao L., Cheng S. | |
| Title | Mutation of DEFECTIVE EMBRYO SAC1 results in a low seed-setting rate in rice by regulating embryo sac development. | |
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Abstract: The seed-setting rate has a significant effect on grain yield in rice (Oryza sativa L.). Embryo sac development is essential for seed setting; however, the molecular mechanism underlying this process remains unclear. Here, we isolated defective embryo SAC1 (des1), a rice mutant with a low seed-setting rate. Cytological examination showed degenerated embryo sacs and reduced fertilization capacity in des1. Map-based cloning revealed a nonsense mutation in OsDES1, a gene that encodes a putative nuclear envelope membrane protein (NEMP)-domain-containing protein that is preferentially expressed in pistils. The OsDES1 mutation disrupts the normal formation of functional megaspores, which ultimately results in a degenerated embryo sac in des1. Reciprocal crosses showed that fertilization is abnormal and that the female reproductive organ is defective in des1. OsDES1 interacts with LONELY GUY (LOG), a cytokinin-activating enzyme that acts in the final step of cytokinin synthesis; mutation of LOG led to defective female reproductive organ development. These results demonstrate that OsDES1 functions in determining the rice seed-setting rate by regulating embryo sac development and fertilization. Our study sheds light on the function of NEMP-type proteins in rice reproductive development. |
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| Journal | J. Exp. Bot. | |
| Country | China | |
| Volume | 74(5) | |
| Pages | 1501-1516 | |
| Year | 2023 | |
| PubMed ID | 36651501 | |
| PubMed Central ID | 10010608 | |
| DOI | 10.1093/jxb/erac506 | |
| URL | - | |
| Relation | ||
| Gene | AHP1 AHP2 DES1 HK3 HST1 LOG1 PAL1 PHP1 PHP2 PHP3 RR1 RR10 RR21 RR26 RR4 RR9 | |
| 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 | - | |
