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Nitrogen supply enhances the physiological resistance of Chinese fir plantlets under polyethylene glycol (PEG)-induced drought stress
Water and nitrogen stresses are major constraints for agricultural and forest productivity. Although the effects of water scarcity or nitrogen stress on plant growth, physiology, and yield have been widely studied, few studies have assessed the combined effects of both stresses. In the present study...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7200756/ https://www.ncbi.nlm.nih.gov/pubmed/32372028 http://dx.doi.org/10.1038/s41598-020-64161-7 |
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author | Li, Shubin Zhou, Lili Addo-Danso, Shalom Daniel Ding, Guochang Sun, Min Wu, Sipan Lin, Sizu |
author_facet | Li, Shubin Zhou, Lili Addo-Danso, Shalom Daniel Ding, Guochang Sun, Min Wu, Sipan Lin, Sizu |
author_sort | Li, Shubin |
collection | PubMed |
description | Water and nitrogen stresses are major constraints for agricultural and forest productivity. Although the effects of water scarcity or nitrogen stress on plant growth, physiology, and yield have been widely studied, few studies have assessed the combined effects of both stresses. In the present study, we investigated the effects of different nitrogen forms (NO(3)(−)N, NH(4)(+)-N, and a combination of NO(3)(−)N + NH(4)(+)-N) on antioxidant enzyme activity, osmotic regulatory substances, and nitrogen assimilation in Chinese fir (Cunninghamia lanceolata) plantlets under drought stress (induced by 10% polyethylene glycol). We found that different N ionic forms had different effects on drought-stressed plantlets. Nitrogen supply greatly increased the activities of superoxide dismutase (SOD), peroxidase (POD) and polyphenol oxidase (PPO) when plantlets were exposed to water stress. The malondialdehyde (MDA) contents significantly decreased under the NH(4)(+) + water stress treatment. The proline (Pr) contents significantly increased in both the NO(3)(−)N and NH(4)(+)-N + water stress treatment. The nitrate reductase (NR) increased by 7.1% in the NO(3)(−) + water stress treatment, and the glutamine synthetase (GS), and the glutamate synthase (GOGAT) activity increased in all the nitrogen + water stress treatments. These results suggested that nitrogen supply could alleviate the adverse effects of drought stress on plants by enhancing antioxidant defense and improving nitrogen assimilation, while the effects on plant tolerance to drought stress varied with nitrogen ionic forms. |
format | Online Article Text |
id | pubmed-7200756 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-72007562020-05-12 Nitrogen supply enhances the physiological resistance of Chinese fir plantlets under polyethylene glycol (PEG)-induced drought stress Li, Shubin Zhou, Lili Addo-Danso, Shalom Daniel Ding, Guochang Sun, Min Wu, Sipan Lin, Sizu Sci Rep Article Water and nitrogen stresses are major constraints for agricultural and forest productivity. Although the effects of water scarcity or nitrogen stress on plant growth, physiology, and yield have been widely studied, few studies have assessed the combined effects of both stresses. In the present study, we investigated the effects of different nitrogen forms (NO(3)(−)N, NH(4)(+)-N, and a combination of NO(3)(−)N + NH(4)(+)-N) on antioxidant enzyme activity, osmotic regulatory substances, and nitrogen assimilation in Chinese fir (Cunninghamia lanceolata) plantlets under drought stress (induced by 10% polyethylene glycol). We found that different N ionic forms had different effects on drought-stressed plantlets. Nitrogen supply greatly increased the activities of superoxide dismutase (SOD), peroxidase (POD) and polyphenol oxidase (PPO) when plantlets were exposed to water stress. The malondialdehyde (MDA) contents significantly decreased under the NH(4)(+) + water stress treatment. The proline (Pr) contents significantly increased in both the NO(3)(−)N and NH(4)(+)-N + water stress treatment. The nitrate reductase (NR) increased by 7.1% in the NO(3)(−) + water stress treatment, and the glutamine synthetase (GS), and the glutamate synthase (GOGAT) activity increased in all the nitrogen + water stress treatments. These results suggested that nitrogen supply could alleviate the adverse effects of drought stress on plants by enhancing antioxidant defense and improving nitrogen assimilation, while the effects on plant tolerance to drought stress varied with nitrogen ionic forms. Nature Publishing Group UK 2020-05-05 /pmc/articles/PMC7200756/ /pubmed/32372028 http://dx.doi.org/10.1038/s41598-020-64161-7 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Li, Shubin Zhou, Lili Addo-Danso, Shalom Daniel Ding, Guochang Sun, Min Wu, Sipan Lin, Sizu Nitrogen supply enhances the physiological resistance of Chinese fir plantlets under polyethylene glycol (PEG)-induced drought stress |
title | Nitrogen supply enhances the physiological resistance of Chinese fir plantlets under polyethylene glycol (PEG)-induced drought stress |
title_full | Nitrogen supply enhances the physiological resistance of Chinese fir plantlets under polyethylene glycol (PEG)-induced drought stress |
title_fullStr | Nitrogen supply enhances the physiological resistance of Chinese fir plantlets under polyethylene glycol (PEG)-induced drought stress |
title_full_unstemmed | Nitrogen supply enhances the physiological resistance of Chinese fir plantlets under polyethylene glycol (PEG)-induced drought stress |
title_short | Nitrogen supply enhances the physiological resistance of Chinese fir plantlets under polyethylene glycol (PEG)-induced drought stress |
title_sort | nitrogen supply enhances the physiological resistance of chinese fir plantlets under polyethylene glycol (peg)-induced drought stress |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7200756/ https://www.ncbi.nlm.nih.gov/pubmed/32372028 http://dx.doi.org/10.1038/s41598-020-64161-7 |
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