Growth dynamics of the Arabidopsis fruit is mediated by cell expansion
| Autor: | Stephanie Brocke, Martin F. Yanofsky, Mingyuan Zhu, Juan José Ripoll, Adrienne H. K. Roeder, Arezki Boudaoud, Cindy T. Hon |
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| Přispěvatelé: | University of California [San Diego] (UC San Diego), University of California, Cornell University [New York], Reproduction et développement des plantes (RDP), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Recherche Agronomique (INRA)-École normale supérieure - Lyon (ENS Lyon), National Science Foundation (NSF) United States Department of Health & Human ServicesNational Institutes of Health (NIH) - USA1R01GM112976-01A1Paul D. Saltman Endowed Chair in Science Education French National Research Agency (ANR)ANR-17-CAPS-0002-01National Science Foundation (NSF)IOS-1553030United States Department of Health & Human ServicesNational Institutes of Health (NIH) - USANIH National Institute of General Medical Sciences (NIGMS)R01GM112976, University of California (UC), École normale supérieure de Lyon (ENS de Lyon)-Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Cell division growth Seed dispersal Arabidopsis Biology 01 natural sciences Sepal 03 medical and health sciences Human fertilization Live cell imaging Ovule 030304 developmental biology 2. Zero hunger 0303 health sciences Multidisciplinary food and beverages modeling fruit biology.organism_classification Fruit morphogenesis Cell biology live-imaging [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition 010606 plant biology & botany |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2019, 116 (50), pp.25333-25342. ⟨10.1073/pnas.1914096116⟩ Proceedings of the National Academy of Sciences of the United States of America, 2019, 116 (50), pp.25333-25342. ⟨10.1073/pnas.1914096116⟩ |
| ISSN: | 1091-6490 0027-8424 |
| Popis: | International audience; Fruit have evolved a sophisticated tissue and cellular architecture to secure plant reproductive success. Postfertilization growth is perhaps the most dramatic event during fruit morphogenesis. Several studies have proposed that fertilized ovules and developing seeds initiate signaling cascades to coordinate and promote the growth of the accompanying fruit tissues. This dynamic process allows the fruit to conspicuously increase its size and acquire its final shape and means for seed dispersal. All these features are key for plant survival and crop yield. Despite its importance, we lack a high-resolution spatiotemporal map of how postfertilization fruit growth proceeds at the cellular level. In this study, we have combined live imaging, mutant backgrounds in which fertilization can be controlled, and computational modeling to monitor and predict post-fertilization fruit growth in Arabidopsis. We have uncovered that, unlike leaves, sepals, or roots, fruit do not exhibit a spatial separation of cell division and expansion domains; instead, there is a separation into temporal stages with fertilization as the trigger for transitioning to cell expansion, which drives postfertilization fruit growth. We quantified the coordination between fertilization and fruit growth by imaging no transmitting tract (ntt) mutants, in which fertilization fails in the bottom half of the fruit. By combining our experimental data with computational modeling, we delineated the mobility properties of the seed-derived signaling cascades promoting growth in the fruit. Our study provides the basis for generating a comprehensive understanding of the molecular and cellular mechanisms governing fruit growth and shape. |
| Databáze: | OpenAIRE |
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