Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature
Studies have not fully explained the underlying mechanism of spermidine-mediated heat tolerance. This study investigated the possible role of spermidine (Spd) in regulating citrus heat tolerance. The results showed that exogenous Spd effectively alleviated the limitation of high temperature (HT) on...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2022-12-01
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| Series: | Plant Signaling & Behavior |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/15592324.2022.2086372 |
| _version_ | 1797351998449778688 |
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| author | Xu Chao Tang Yuqing Liu Xincheng Yang Huidong Wang Yuting Hu Zhongdong Hu Xinlong Liu Buchun Su Jing |
| author_facet | Xu Chao Tang Yuqing Liu Xincheng Yang Huidong Wang Yuting Hu Zhongdong Hu Xinlong Liu Buchun Su Jing |
| author_sort | Xu Chao |
| collection | DOAJ |
| description | Studies have not fully explained the underlying mechanism of spermidine-mediated heat tolerance. This study investigated the possible role of spermidine (Spd) in regulating citrus heat tolerance. The results showed that exogenous Spd effectively alleviated the limitation of high temperature (HT) on photosynthesis. Exogenous Spd increased the chlorophyll content, net photosynthetic rate, intercellular carbon dioxide concentration, stomatal conductance, maximum and effective quantum yield of PSII photochemistry, nonphotochemical quenching coefficient, and electron transport rate in citrus seedlings under HT stress, but declined the stomatal limitation value. In addition, Spd treatment promoted the dynamic balance of the citrus enzymatic and non-enzymatic antioxidants system. Spd application significantly increased the activity of superoxide dismutase, peroxidase, catalase, ascorbic acid, and glutathione and the expression level of corresponding genes at high temperature, while reducing the content of H2O2 and malondialdehyde. Therefore, our findings suggested exogenous Spd significantly ameliorated citrus physiological and photosynthetic adaptation under HT stress, thereby providing helpful guidance for citrus cultivation in HT events. |
| first_indexed | 2024-03-08T13:08:50Z |
| format | Article |
| id | doaj.art-f57849ff536447b49ac979ee165b3db5 |
| institution | Directory Open Access Journal |
| issn | 1559-2316 1559-2324 |
| language | English |
| last_indexed | 2024-03-08T13:08:50Z |
| publishDate | 2022-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Plant Signaling & Behavior |
| spelling | doaj.art-f57849ff536447b49ac979ee165b3db52024-01-18T15:58:21ZengTaylor & Francis GroupPlant Signaling & Behavior1559-23161559-23242022-12-0117110.1080/15592324.2022.20863722086372Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperatureXu Chao0Tang Yuqing1Liu Xincheng2Yang Huidong3Wang Yuting4Hu Zhongdong5Hu Xinlong6Liu Buchun7Su Jing8Institute of Horticulture, Jiangxi Academy of Agricultural SciencesInstitute of Horticulture, Jiangxi Academy of Agricultural SciencesInstitute of Horticulture, Jiangxi Academy of Agricultural SciencesInstitute of Horticulture, Jiangxi Academy of Agricultural SciencesInstitute of Horticulture, Jiangxi Academy of Agricultural SciencesInstitute of Horticulture, Jiangxi Academy of Agricultural SciencesInstitute of Horticulture, Jiangxi Academy of Agricultural SciencesCAAS/National Engineering Laboratory of Efficient Crop Water Use and Disaster Reduction/Key Laboratory of Agricultural Environment, Ministry of Agriculture and Rural AffairsMEEStudies have not fully explained the underlying mechanism of spermidine-mediated heat tolerance. This study investigated the possible role of spermidine (Spd) in regulating citrus heat tolerance. The results showed that exogenous Spd effectively alleviated the limitation of high temperature (HT) on photosynthesis. Exogenous Spd increased the chlorophyll content, net photosynthetic rate, intercellular carbon dioxide concentration, stomatal conductance, maximum and effective quantum yield of PSII photochemistry, nonphotochemical quenching coefficient, and electron transport rate in citrus seedlings under HT stress, but declined the stomatal limitation value. In addition, Spd treatment promoted the dynamic balance of the citrus enzymatic and non-enzymatic antioxidants system. Spd application significantly increased the activity of superoxide dismutase, peroxidase, catalase, ascorbic acid, and glutathione and the expression level of corresponding genes at high temperature, while reducing the content of H2O2 and malondialdehyde. Therefore, our findings suggested exogenous Spd significantly ameliorated citrus physiological and photosynthetic adaptation under HT stress, thereby providing helpful guidance for citrus cultivation in HT events.http://dx.doi.org/10.1080/15592324.2022.2086372antioxidantschlorophyll fluorescencegas exchangeheat stressphotosynthesis |
| spellingShingle | Xu Chao Tang Yuqing Liu Xincheng Yang Huidong Wang Yuting Hu Zhongdong Hu Xinlong Liu Buchun Su Jing Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature Plant Signaling & Behavior antioxidants chlorophyll fluorescence gas exchange heat stress photosynthesis |
| title | Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature |
| title_full | Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature |
| title_fullStr | Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature |
| title_full_unstemmed | Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature |
| title_short | Exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature |
| title_sort | exogenous spermidine enhances the photosynthetic and antioxidant capacity of citrus seedlings under high temperature |
| topic | antioxidants chlorophyll fluorescence gas exchange heat stress photosynthesis |
| url | http://dx.doi.org/10.1080/15592324.2022.2086372 |
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