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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...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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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. |
format | Online Article Text |
id | pubmed-8876634 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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