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Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower

Tomato flower abscission is a critical agronomic problem directly affecting yield. It often occurs in greenhouses in winter, with the weak light or hazy weather leading to insufficient photosynthates. The importance of carbohydrate availability in flower retention has been illustrated, while relativ...

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Detalles Bibliográficos
Autores principales: Li, Qiang, Chai, Lin, Tong, Na, Yu, Hongjun, Jiang, Weijie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8876634/
https://www.ncbi.nlm.nih.gov/pubmed/35216070
http://dx.doi.org/10.3390/ijms23041952
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author Li, Qiang
Chai, Lin
Tong, Na
Yu, Hongjun
Jiang, Weijie
author_facet Li, Qiang
Chai, Lin
Tong, Na
Yu, Hongjun
Jiang, Weijie
author_sort Li, Qiang
collection PubMed
description Tomato flower abscission is a critical agronomic problem directly affecting yield. It often occurs in greenhouses in winter, with the weak light or hazy weather leading to insufficient photosynthates. The importance of carbohydrate availability in flower retention has been illustrated, while relatively little is understood concerning the mechanism of carbohydrate regulation on flower abscission. In the present study, we analyzed the responding pattern of nonstructural carbohydrates (NSC, including total soluble sugars and starch) and the potential sugar signal pathway involved in abscission regulation in tomato flowers under shading condition, and their correlations with flower abscission rate and abscission-related hormones. The results showed that, when plants suffer from short-term photosynthesis deficiency, starch degradation in flower organs acts as a self-protection mechanism, providing a carbon source for flower growth and temporarily alleviating the impact on flower development. Trehalose 6-phosphate (T6P) and sucrose non-fermenting-like kinase (SnRK1) signaling seems to be involved in adapting the metabolism to sugar starvation stress through regulating starch remobilization and crosstalk with IAA, ABA, and ethylene in flowers. However, a continuous limitation of assimilating supply imposed starch depletion in flowers, which caused flower abscission.
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spelling pubmed-88766342022-02-26 Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower Li, Qiang Chai, Lin Tong, Na Yu, Hongjun Jiang, Weijie Int J Mol Sci Article Tomato flower abscission is a critical agronomic problem directly affecting yield. It often occurs in greenhouses in winter, with the weak light or hazy weather leading to insufficient photosynthates. The importance of carbohydrate availability in flower retention has been illustrated, while relatively little is understood concerning the mechanism of carbohydrate regulation on flower abscission. In the present study, we analyzed the responding pattern of nonstructural carbohydrates (NSC, including total soluble sugars and starch) and the potential sugar signal pathway involved in abscission regulation in tomato flowers under shading condition, and their correlations with flower abscission rate and abscission-related hormones. The results showed that, when plants suffer from short-term photosynthesis deficiency, starch degradation in flower organs acts as a self-protection mechanism, providing a carbon source for flower growth and temporarily alleviating the impact on flower development. Trehalose 6-phosphate (T6P) and sucrose non-fermenting-like kinase (SnRK1) signaling seems to be involved in adapting the metabolism to sugar starvation stress through regulating starch remobilization and crosstalk with IAA, ABA, and ethylene in flowers. However, a continuous limitation of assimilating supply imposed starch depletion in flowers, which caused flower abscission. MDPI 2022-02-10 /pmc/articles/PMC8876634/ /pubmed/35216070 http://dx.doi.org/10.3390/ijms23041952 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Qiang
Chai, Lin
Tong, Na
Yu, Hongjun
Jiang, Weijie
Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower
title Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower
title_full Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower
title_fullStr Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower
title_full_unstemmed Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower
title_short Potential Carbohydrate Regulation Mechanism Underlying Starvation-Induced Abscission of Tomato Flower
title_sort potential carbohydrate regulation mechanism underlying starvation-induced abscission of tomato flower
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8876634/
https://www.ncbi.nlm.nih.gov/pubmed/35216070
http://dx.doi.org/10.3390/ijms23041952
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