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Wu J, Li P, Zhu D, Ma H, Li M, Lai Y, Peng Y, Li H, Li S, Wei J, Bian X, Rahman A, Wu S. SlCRCa is a key D-class gene controlling ovule fate determination in tomato. Plant Biotechnol J 2024. [PMID: 38561972 DOI: 10.1111/pbi.14317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 01/29/2024] [Accepted: 02/10/2024] [Indexed: 04/04/2024]
Abstract
Cell fate determination and primordium initiation on the placental surface are two key events for ovule formation in seed plants, which directly affect ovule density and seed yield. Despite ovules form in the marginal meristematic tissues of the carpels, angiosperm carpels evolved after the ovules. It is not clear how the development of the ovules and carpels is coordinated in angiosperms. In this study, we identify the S. lycopersicum CRABS CLAW (CRC) homologue SlCRCa as an essential determinant of ovule fate. We find that SlCRCa is not only expressed in the placental surface and ovule primordia but also functions as a D-class gene to block carpel fate and promote ovule fate in the placental surface. Loss of function of SlCRCa causes homeotic transformation of the ovules to carpels. In addition, we find low levels of the S. lycopersicum AINTEGUMENTA (ANT) homologue (SlANT2) favour the ovule initiation, whereas high levels of SlANT2 promote placental carpelization. SlCRCa forms heterodimer with tomato INNER NO OUTER (INO) and AGAMOUS (AG) orthologues, SlINO and TOMATO AGAMOUS1 (TAG1), to repress SlANT2 expression during the ovule initiation. Our study confirms that angiosperm basal ovule cells indeed retain certain carpel properties and provides mechanistic insights into the ovule initiation.
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Affiliation(s)
- Junqing Wu
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Pengxue Li
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Danyang Zhu
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Haochuan Ma
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Meng Li
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yixuan Lai
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yuxin Peng
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Haixiao Li
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Shuang Li
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jinbo Wei
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xinxin Bian
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Abidur Rahman
- Department of Plant Bio-Sciences, Faculty of Agriculture, Iwate University, Morioka, Japan
- United Graduate School of Agricultural Sciences, Iwate University, Morioka, Japan
| | - Shuang Wu
- College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
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Yang T, He Y, Niu S, Zhang Y. A YABBY gene CRABS CLAW a (CRCa) negatively regulates flower and fruit sizes in tomato. Plant Sci 2022; 320:111285. [PMID: 35643610 DOI: 10.1016/j.plantsci.2022.111285] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 03/28/2022] [Accepted: 04/10/2022] [Indexed: 06/15/2023]
Abstract
CRABS CLAW (CRC) is a YABBY transcription factor that plays a pivotal role in carpel development and flower meristem determinacy. Here, we characterized a CRC homolog SlCRCa and elucidated its specific roles in tomato (Solanum lycopersicum). SlCRCa is highly expressed in the petals and stamens, and is responsive to gibberellin (GA) treatment. Overexpression of SlCRCa in tomato reduces the sizes of petals, stamens, and fruits, while the inverse phenotypes are induced by knockdown of SlCRCa. Furthermore, histological investigation suggests that the smaller or larger fruits in SlCRCa-overexpressing or SlCRCa-RNAi plants are mainly determined by the decreases or increases in cell layers and cell sizes in pericarp, respectively. Through transcriptome and qRT-PCR analyses, we speculate that SlCRCa inhibits cell division by regulating the transcription of cell division-related genes, and also suppresses cell expansion by modulating the expansin genes and GA pathway in tomato fruits. Besides, SlCRCa is involved in the feedback regulation of GA biosynthesis. Our findings reveal that SlCRCa negatively regulates fruit size by affecting cell division and cell expansion, and it is also an inhibitor of floral organ sizes in tomato.
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Affiliation(s)
- Tongwen Yang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center for Vegetables, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
| | - Yu He
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center for Vegetables, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
| | - Shaobo Niu
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center for Vegetables, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
| | - Yan Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, PR China; Shaanxi Engineering Research Center for Vegetables, Northwest A&F University, Yangling 712100, Shaanxi, PR China.
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