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Auxin Coordinates Achene and Receptacle Development During Fruit Initiation in Fragaria vesca

In strawberries, fruit set is considered as the transition from the quiescent ovary to a rapidly growing fruit. Auxin, which is produced from the fertilized ovule in the achenes, plays a key role in promoting the enlargement of receptacles. However, detailed regulatory mechanisms for fruit set and t...

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Autores principales: Tian, Yunhe, Xin, Wei, Lin, Juncheng, Ma, Jun, He, Jun, Wang, Xuhui, Xu, Tongda, Tang, Wenxin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9301465/
https://www.ncbi.nlm.nih.gov/pubmed/35873981
http://dx.doi.org/10.3389/fpls.2022.929831
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author Tian, Yunhe
Xin, Wei
Lin, Juncheng
Ma, Jun
He, Jun
Wang, Xuhui
Xu, Tongda
Tang, Wenxin
author_facet Tian, Yunhe
Xin, Wei
Lin, Juncheng
Ma, Jun
He, Jun
Wang, Xuhui
Xu, Tongda
Tang, Wenxin
author_sort Tian, Yunhe
collection PubMed
description In strawberries, fruit set is considered as the transition from the quiescent ovary to a rapidly growing fruit. Auxin, which is produced from the fertilized ovule in the achenes, plays a key role in promoting the enlargement of receptacles. However, detailed regulatory mechanisms for fruit set and the mutual regulation between achenes and receptacles are largely unknown. In this study, we found that pollination promoted fruit development (both achene and receptacle), which could be stimulated by exogenous auxin treatment. Interestingly, auxin was highly accumulated in achenes, but not in receptacles, after pollination. Further transcriptome analysis showed that only a small portion of the differentially expressed genes induced by pollination overlapped with those by exogenous auxin treatment. Auxin, but not pollination, was able to activate the expression of growth-related genes, especially in receptacles, which resulted in fast growth. Meanwhile, those genes involved in the pathways of other hormones, such as GA and cytokinin, were also regulated by exogenous auxin treatment, but not pollination. This suggested that pollination was not able to activate auxin responses in receptacles but produced auxin in fertilized achenes, and then auxin might be able to transport or transduce from achenes to receptacles and promote fast fruit growth at the early stage of fruit initiation. Our work revealed a potential coordination between achenes and receptacles during fruit set, and auxin might be a key coordinator.
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spelling pubmed-93014652022-07-22 Auxin Coordinates Achene and Receptacle Development During Fruit Initiation in Fragaria vesca Tian, Yunhe Xin, Wei Lin, Juncheng Ma, Jun He, Jun Wang, Xuhui Xu, Tongda Tang, Wenxin Front Plant Sci Plant Science In strawberries, fruit set is considered as the transition from the quiescent ovary to a rapidly growing fruit. Auxin, which is produced from the fertilized ovule in the achenes, plays a key role in promoting the enlargement of receptacles. However, detailed regulatory mechanisms for fruit set and the mutual regulation between achenes and receptacles are largely unknown. In this study, we found that pollination promoted fruit development (both achene and receptacle), which could be stimulated by exogenous auxin treatment. Interestingly, auxin was highly accumulated in achenes, but not in receptacles, after pollination. Further transcriptome analysis showed that only a small portion of the differentially expressed genes induced by pollination overlapped with those by exogenous auxin treatment. Auxin, but not pollination, was able to activate the expression of growth-related genes, especially in receptacles, which resulted in fast growth. Meanwhile, those genes involved in the pathways of other hormones, such as GA and cytokinin, were also regulated by exogenous auxin treatment, but not pollination. This suggested that pollination was not able to activate auxin responses in receptacles but produced auxin in fertilized achenes, and then auxin might be able to transport or transduce from achenes to receptacles and promote fast fruit growth at the early stage of fruit initiation. Our work revealed a potential coordination between achenes and receptacles during fruit set, and auxin might be a key coordinator. Frontiers Media S.A. 2022-07-07 /pmc/articles/PMC9301465/ /pubmed/35873981 http://dx.doi.org/10.3389/fpls.2022.929831 Text en Copyright © 2022 Tian, Xin, Lin, Ma, He, Wang, Xu and Tang. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Tian, Yunhe
Xin, Wei
Lin, Juncheng
Ma, Jun
He, Jun
Wang, Xuhui
Xu, Tongda
Tang, Wenxin
Auxin Coordinates Achene and Receptacle Development During Fruit Initiation in Fragaria vesca
title Auxin Coordinates Achene and Receptacle Development During Fruit Initiation in Fragaria vesca
title_full Auxin Coordinates Achene and Receptacle Development During Fruit Initiation in Fragaria vesca
title_fullStr Auxin Coordinates Achene and Receptacle Development During Fruit Initiation in Fragaria vesca
title_full_unstemmed Auxin Coordinates Achene and Receptacle Development During Fruit Initiation in Fragaria vesca
title_short Auxin Coordinates Achene and Receptacle Development During Fruit Initiation in Fragaria vesca
title_sort auxin coordinates achene and receptacle development during fruit initiation in fragaria vesca
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9301465/
https://www.ncbi.nlm.nih.gov/pubmed/35873981
http://dx.doi.org/10.3389/fpls.2022.929831
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