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Reference Detail
| Reference | ||
|---|---|---|
| Author | Xu M., Tang D., Cheng X., Zhang J., Tang Y., Tao Q., Shi W., You A., Gu M., Cheng Z., Yu H. | |
| Title | OsPINOID Regulates Stigma and Ovule Initiation through Maintenance of the floral meristem by Auxin Signaling. | |
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Abstract: Stigma and ovule initiation is essential for sexual reproduction in flowering plants. However, the mechanism underlying the initiation of stigma and ovule primordia remains elusive. We identified a stigma-less mutant of rice (<i>Oryza sativa</i>) and revealed that it was caused by the mutation in the <i>PINOID</i> (<i>OsPID</i>) gene. Unlike the <i>pid</i> mutant that shows typical pin-like inflorescences in maize (<i>Zea mays</i>) and Arabidopsis (<i>Arabidopsis thaliana</i>), the <i>OsPID</i> mutant does not display any defects in inflorescence development and flower initiation, and fails to develop normal ovules in most spikelets. The auxin activity in the young pistil of <i>OsPID</i> was lower than that in the wild-type pistil. Furthermore, the expression of most auxin response factor genes was down-regulated, and <i>OsETTIN1</i>, <i>OsETTIN2</i>, and <i>OsMONOPTEROS</i> lost their rearrangements of expression patterns during pistil and stamen primordia development in <i>OsPID</i> Moreover, the transcription of the floral meristem marker gene, <i>OSH1</i>, was down-regulated and <i>FLORAL ORGAN NUMBER4</i>, the putative ortholog of Arabidopsis <i>CLAVATA3</i>, was up-regulated in the pistil primordium of <i>OsPID</i> These results suggested that the meristem proliferation in the pistil primordium might be arrested prematurely in <i>OsPID</i> Based on these results, we propose that the OsPID-mediated auxin signaling pathway plays a crucial role in the regulation of rice stigma and ovule initiation by maintaining the floral meristem. |
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| Journal | Plant Physiol. | |
| Country | China | |
| Volume | 180(2) | |
| Pages | 952-965 | |
| Year | 2019 | |
| PubMed ID | 30926655 | |
| PubMed Central ID | 6548252 | |
| DOI | 10.1104/pp.18.01385 | |
| URL | - | |
| Relation | ||
| Gene | BIF2 ETT1 ETT2 FON2 MP OSH1 | |
| 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 | - | |
