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Short waterlogging events differently affect morphology and photosynthesis of two cucumber (Cucumis sativus L.) cultivars
Waterlogging induces growth and developmental changes in sensitive crops such as cucumber (Cucumis sativus L.) during early plant development. However, information on the physiological mechanisms underpinning the response of cucumber plants to waterlogging conditions is limited. Here, we investigate...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9355484/ https://www.ncbi.nlm.nih.gov/pubmed/35937378 http://dx.doi.org/10.3389/fpls.2022.896244 |
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author | Olorunwa, Omolayo J. Adhikari, Bikash Brazel, Skyler Popescu, Sorina C. Popescu, George V. Barickman, T. Casey |
author_facet | Olorunwa, Omolayo J. Adhikari, Bikash Brazel, Skyler Popescu, Sorina C. Popescu, George V. Barickman, T. Casey |
author_sort | Olorunwa, Omolayo J. |
collection | PubMed |
description | Waterlogging induces growth and developmental changes in sensitive crops such as cucumber (Cucumis sativus L.) during early plant development. However, information on the physiological mechanisms underpinning the response of cucumber plants to waterlogging conditions is limited. Here, we investigated the effects of 10-day waterlogging stress on the morphology, photosynthesis, and chlorophyll fluorescence parameters in two cultivars of cucumber seedlings. Waterlogging stress hampered cultivars’ growth, biomass accumulation, and photosynthetic capacity. Both cultivars also developed adventitious roots (ARs) after 10 days of waterlogging (DOW). We observed differential responses in the light- and carbon-dependent reactions of photosynthesis, with an increase in light-dependent reactions. At the same time, carbon assimilation was considerably inhibited by waterlogging. Specifically, the CO(2) assimilation rate (A) in leaves was significantly reduced and was caused by a corresponding decrease in stomatal conductance (g(s)). The downregulation of the maximum rate of Rubisco efficiency (V(cmax)) and the maximum rate of photosynthetic electron transport (J(max)) were non-stomatal limiting factors contributing to A reduction. Exposure of cucumber to 10 DOW affected the PSII photochemistry by downregulating the PSII quantum yield (Φ(PSII)). The redox state of the primary quinone acceptor in the lake model (1-qL), a measure of the regulatory balance of the light reactions, became more oxidized after 10 DOW, indicating enhanced electron sink capacity despite a reduced A. Overall, the results suggest that waterlogging induces alterations in the photochemical apparatus efficiency of cucumber. Thus, developing cultivars that resist inhibition of PSII photochemistry while maintaining carbon metabolism is a potential approach for increasing crops’ tolerance to waterlogged environments. |
format | Online Article Text |
id | pubmed-9355484 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-93554842022-08-06 Short waterlogging events differently affect morphology and photosynthesis of two cucumber (Cucumis sativus L.) cultivars Olorunwa, Omolayo J. Adhikari, Bikash Brazel, Skyler Popescu, Sorina C. Popescu, George V. Barickman, T. Casey Front Plant Sci Plant Science Waterlogging induces growth and developmental changes in sensitive crops such as cucumber (Cucumis sativus L.) during early plant development. However, information on the physiological mechanisms underpinning the response of cucumber plants to waterlogging conditions is limited. Here, we investigated the effects of 10-day waterlogging stress on the morphology, photosynthesis, and chlorophyll fluorescence parameters in two cultivars of cucumber seedlings. Waterlogging stress hampered cultivars’ growth, biomass accumulation, and photosynthetic capacity. Both cultivars also developed adventitious roots (ARs) after 10 days of waterlogging (DOW). We observed differential responses in the light- and carbon-dependent reactions of photosynthesis, with an increase in light-dependent reactions. At the same time, carbon assimilation was considerably inhibited by waterlogging. Specifically, the CO(2) assimilation rate (A) in leaves was significantly reduced and was caused by a corresponding decrease in stomatal conductance (g(s)). The downregulation of the maximum rate of Rubisco efficiency (V(cmax)) and the maximum rate of photosynthetic electron transport (J(max)) were non-stomatal limiting factors contributing to A reduction. Exposure of cucumber to 10 DOW affected the PSII photochemistry by downregulating the PSII quantum yield (Φ(PSII)). The redox state of the primary quinone acceptor in the lake model (1-qL), a measure of the regulatory balance of the light reactions, became more oxidized after 10 DOW, indicating enhanced electron sink capacity despite a reduced A. Overall, the results suggest that waterlogging induces alterations in the photochemical apparatus efficiency of cucumber. Thus, developing cultivars that resist inhibition of PSII photochemistry while maintaining carbon metabolism is a potential approach for increasing crops’ tolerance to waterlogged environments. Frontiers Media S.A. 2022-07-22 /pmc/articles/PMC9355484/ /pubmed/35937378 http://dx.doi.org/10.3389/fpls.2022.896244 Text en Copyright © 2022 Olorunwa, Adhikari, Brazel, Popescu, Popescu and Barickman. 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 Olorunwa, Omolayo J. Adhikari, Bikash Brazel, Skyler Popescu, Sorina C. Popescu, George V. Barickman, T. Casey Short waterlogging events differently affect morphology and photosynthesis of two cucumber (Cucumis sativus L.) cultivars |
title | Short waterlogging events differently affect morphology and photosynthesis of two cucumber (Cucumis sativus L.) cultivars |
title_full | Short waterlogging events differently affect morphology and photosynthesis of two cucumber (Cucumis sativus L.) cultivars |
title_fullStr | Short waterlogging events differently affect morphology and photosynthesis of two cucumber (Cucumis sativus L.) cultivars |
title_full_unstemmed | Short waterlogging events differently affect morphology and photosynthesis of two cucumber (Cucumis sativus L.) cultivars |
title_short | Short waterlogging events differently affect morphology and photosynthesis of two cucumber (Cucumis sativus L.) cultivars |
title_sort | short waterlogging events differently affect morphology and photosynthesis of two cucumber (cucumis sativus l.) cultivars |
topic | Plant Science |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9355484/ https://www.ncbi.nlm.nih.gov/pubmed/35937378 http://dx.doi.org/10.3389/fpls.2022.896244 |
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