Pivotal role of STIP in ovule pattern formation and female germline development in Arabidopsis thaliana
| Autor: | Mara Cucinotta, Flavio Gabrieli, ALEX CAVALLERI, Rosanna Petrella, Lucia Colombo, Kay Schneitz |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Ovule
Arabidopsis thaliana Arabidopsis Proteins female gametophyte Arabidopsis WOX transcription factor ovule development plant reproduction ovule integuments megasporogenesis Settore BIO/01 - Botanica Generale Settore BIO/18 - Genetica Germ Cells Gene Expression Regulation Plant Molecular Biology Transcription Factors Developmental Biology |
| Popis: | In spermatophytes the sporophytic (diploid) and the gametophytic (haploid) generations co-exist in ovules, and the coordination of their developmental programs is of pivotal importance for plant reproduction. To achieve efficient fertilization, the haploid female gametophyte and the diploid ovule structures must coordinate their development to form a functional and correctly shaped ovule. WUSCHEL-RELATED HOMEOBOX (WOX) genes encode a family of transcription factors that share important roles in a wide range of processes throughout plant development. Here, we show that STIP is required for the correct patterning and curvature of the ovule in Arabidopsis thaliana. The knockout mutant stip-2 is characterized by a radialized ovule phenotype due to severe defects in outer integument development. In addition, alteration of STIP expression affects the correct differentiation and progression of the female germline. Finally, our results reveal that STIP is required to tightly regulate the key ovule factors INNER NO OUTER, PHABULOSA and WUSCHEL, and they define a novel genetic interplay in the regulatory networks determining ovule development. |
| Databáze: | OpenAIRE |
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