Effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (Medicago sativa L.)
Climate changes severely influence photosynthetic activity of plants. Studies on the combined effect of drought and heat stress on photosynthesis, pigments, and xanthophyll cycle particularly in alfalfa (Medicago sativa L.) are limited. Thus, this study investigated the combined effects of drought a...
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Academy of Sciences of the Czech Republic, Institute of Experimental Botany
2020
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Online Access: | https://doi.org/10.32615/ps.2020.073 https://doaj.org/article/e64a6bd0a350478d947c723f6c3d9cbb |
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ftdoajarticles:oai:doaj.org/article:e64a6bd0a350478d947c723f6c3d9cbb 2023-05-15T13:15:59+02:00 Effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (Medicago sativa L.) C. XU C.G. HE Y.J. WANG Y.F. BI H. JIANG 2020-12-01T00:00:00Z https://doi.org/10.32615/ps.2020.073 https://doaj.org/article/e64a6bd0a350478d947c723f6c3d9cbb EN eng Academy of Sciences of the Czech Republic, Institute of Experimental Botany https://ps.ueb.cas.cz/artkey/phs-202005-0018_effect-of-drought-and-heat-stresses-on-photosynthesis-pigments-and-xanthophyll-cycle-in-alfalfa-medicago-sa.php https://doaj.org/toc/0300-3604 https://doaj.org/toc/1573-9058 0300-3604 1573-9058 doi:10.32615/ps.2020.073 https://doaj.org/article/e64a6bd0a350478d947c723f6c3d9cbb Photosynthetica, Vol 58, Iss 5, Pp 1226-1236 (2020) abiotic stress global warming photosynthetic parameters thermal dissipation Botany QK1-989 article 2020 ftdoajarticles https://doi.org/10.32615/ps.2020.073 2022-12-31T09:51:40Z Climate changes severely influence photosynthetic activity of plants. Studies on the combined effect of drought and heat stress on photosynthesis, pigments, and xanthophyll cycle particularly in alfalfa (Medicago sativa L.) are limited. Thus, this study investigated the combined effects of drought and heat stress in two alfalfa varieties ('Deqin' and 'Algonguin'). Results revealed that the values of the net photosynthetic rate demonstrated a significantly decreasing tendency under stresses. The effect of stresses on ribulose 1,5-bisphosphate carboxylase activity in both varieties showed a trend of first declining and then rising. Meanwhile, phosphoenolpyruvate carboxylase activity showed an increasing tendency. The intensification of stresses led to reduced photochemical efficiency and increased capability of thermal dissipation. A linear correlation was found between nonphotochemical quenching and xanthophyll cycle components. Thus, the change in carotenoids demonstrated an important role in photoprotection, the xanthophyll cycle was the main way of dissipation of excess energy under stress conditions in alfalfa. Article in Journal/Newspaper Algonguin Directory of Open Access Journals: DOAJ Articles Photosynthetica 58 5 1226 1236 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
abiotic stress global warming photosynthetic parameters thermal dissipation Botany QK1-989 |
spellingShingle |
abiotic stress global warming photosynthetic parameters thermal dissipation Botany QK1-989 C. XU C.G. HE Y.J. WANG Y.F. BI H. JIANG Effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (Medicago sativa L.) |
topic_facet |
abiotic stress global warming photosynthetic parameters thermal dissipation Botany QK1-989 |
description |
Climate changes severely influence photosynthetic activity of plants. Studies on the combined effect of drought and heat stress on photosynthesis, pigments, and xanthophyll cycle particularly in alfalfa (Medicago sativa L.) are limited. Thus, this study investigated the combined effects of drought and heat stress in two alfalfa varieties ('Deqin' and 'Algonguin'). Results revealed that the values of the net photosynthetic rate demonstrated a significantly decreasing tendency under stresses. The effect of stresses on ribulose 1,5-bisphosphate carboxylase activity in both varieties showed a trend of first declining and then rising. Meanwhile, phosphoenolpyruvate carboxylase activity showed an increasing tendency. The intensification of stresses led to reduced photochemical efficiency and increased capability of thermal dissipation. A linear correlation was found between nonphotochemical quenching and xanthophyll cycle components. Thus, the change in carotenoids demonstrated an important role in photoprotection, the xanthophyll cycle was the main way of dissipation of excess energy under stress conditions in alfalfa. |
format |
Article in Journal/Newspaper |
author |
C. XU C.G. HE Y.J. WANG Y.F. BI H. JIANG |
author_facet |
C. XU C.G. HE Y.J. WANG Y.F. BI H. JIANG |
author_sort |
C. XU |
title |
Effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (Medicago sativa L.) |
title_short |
Effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (Medicago sativa L.) |
title_full |
Effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (Medicago sativa L.) |
title_fullStr |
Effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (Medicago sativa L.) |
title_full_unstemmed |
Effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (Medicago sativa L.) |
title_sort |
effect of drought and heat stresses on photosynthesis, pigments, and xanthophyll cycle in alfalfa (medicago sativa l.) |
publisher |
Academy of Sciences of the Czech Republic, Institute of Experimental Botany |
publishDate |
2020 |
url |
https://doi.org/10.32615/ps.2020.073 https://doaj.org/article/e64a6bd0a350478d947c723f6c3d9cbb |
genre |
Algonguin |
genre_facet |
Algonguin |
op_source |
Photosynthetica, Vol 58, Iss 5, Pp 1226-1236 (2020) |
op_relation |
https://ps.ueb.cas.cz/artkey/phs-202005-0018_effect-of-drought-and-heat-stresses-on-photosynthesis-pigments-and-xanthophyll-cycle-in-alfalfa-medicago-sa.php https://doaj.org/toc/0300-3604 https://doaj.org/toc/1573-9058 0300-3604 1573-9058 doi:10.32615/ps.2020.073 https://doaj.org/article/e64a6bd0a350478d947c723f6c3d9cbb |
op_doi |
https://doi.org/10.32615/ps.2020.073 |
container_title |
Photosynthetica |
container_volume |
58 |
container_issue |
5 |
container_start_page |
1226 |
op_container_end_page |
1236 |
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1766272078050230272 |