Exogenous application of gibberellic acid mitigates drought-induced damage in spring wheat
Drought stress is a major problem in wheat production but it could be managed by using various exogenous protectants such as gibberellic acid (GA). Although GA is a plant growth hormone, it shows a potential to protect the plant in stress conditions. To investigate the possible role of GA in mitigat...
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doaj-dda7e5aaa0504e4582812424fae739082021-04-02T19:21:01ZengPolish Botanical SocietyActa Agrobotanica2300-357X2019-07-0172210.5586/aa.17767003Exogenous application of gibberellic acid mitigates drought-induced damage in spring wheat- Moumita0Jubayer Al Mahmud1Parimal Kanti Biswas2Kamrun Nahar3Masayuki Fujita4Mirza Hasanuzzaman5Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka 1207Department of Agroforestry and Environmental Science, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka 1207Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka 1207Department of Agricultural Botany, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka 1207Laboratory of Plant Stress Responses, Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka 1207Drought stress is a major problem in wheat production but it could be managed by using various exogenous protectants such as gibberellic acid (GA). Although GA is a plant growth hormone, it shows a potential to protect the plant in stress conditions. To investigate the possible role of GA in mitigating drought stress, we treated wheat (Triticum aestivum ‘BARI Gom-21’) seedlings with a GA spray under semihydroponic conditions. In the experiment, the combined effect of GA and drought stress (induced by 12% polyethylene glycol) was studied after 48 h and 72 h. In the absence of exogenous GA, drought-stressed wheat seedlings showed various physiological and biochemical changes in a time-dependent manner. Malondialdehyde (MDA), hydrogen peroxide (H2O2) and free proline (Pro) concentrations were increased, whereas catalase (CAT) and ascorbate peroxidase (APX) activities were reduced under drought stress. Gibberellic acid played a role in restoring the ascorbate (AsA) level, decreased the reduced/oxidized glutathione (GSH/GSSG) ratio and reduced monodehydroascorbate reductase (MDHAR) and dehydroascorbate reductase (DHAR) activities. Gibberellic acid significantly affected the glyoxalase system. Under drought stress, the methylglyoxal (MG) concentration was increased but GA application stimulated glyoxalase I (Gly I) and glyoxalase II (Gly II) activities to protect the wheat seedlings against stress. The study concluded that the severity of drought stress in wheat depends on the growth stage and it increases with an increase in the duration of stress, whereas exogenous GA helped the seedlings to survive by upregulating antioxidant defense mechanisms and the glyoxalase system.https://pbsociety.org.pl/journals/index.php/aa/article/view/8425osmotic stressreactive oxygen speciesantioxidantphytohormonesglyoxalase |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
- Moumita Jubayer Al Mahmud Parimal Kanti Biswas Kamrun Nahar Masayuki Fujita Mirza Hasanuzzaman |
spellingShingle |
- Moumita Jubayer Al Mahmud Parimal Kanti Biswas Kamrun Nahar Masayuki Fujita Mirza Hasanuzzaman Exogenous application of gibberellic acid mitigates drought-induced damage in spring wheat Acta Agrobotanica osmotic stress reactive oxygen species antioxidant phytohormones glyoxalase |
author_facet |
- Moumita Jubayer Al Mahmud Parimal Kanti Biswas Kamrun Nahar Masayuki Fujita Mirza Hasanuzzaman |
author_sort |
- Moumita |
title |
Exogenous application of gibberellic acid mitigates drought-induced damage in spring wheat |
title_short |
Exogenous application of gibberellic acid mitigates drought-induced damage in spring wheat |
title_full |
Exogenous application of gibberellic acid mitigates drought-induced damage in spring wheat |
title_fullStr |
Exogenous application of gibberellic acid mitigates drought-induced damage in spring wheat |
title_full_unstemmed |
Exogenous application of gibberellic acid mitigates drought-induced damage in spring wheat |
title_sort |
exogenous application of gibberellic acid mitigates drought-induced damage in spring wheat |
publisher |
Polish Botanical Society |
series |
Acta Agrobotanica |
issn |
2300-357X |
publishDate |
2019-07-01 |
description |
Drought stress is a major problem in wheat production but it could be managed by using various exogenous protectants such as gibberellic acid (GA). Although GA is a plant growth hormone, it shows a potential to protect the plant in stress conditions. To investigate the possible role of GA in mitigating drought stress, we treated wheat (Triticum aestivum ‘BARI Gom-21’) seedlings with a GA spray under semihydroponic conditions. In the experiment, the combined effect of GA and drought stress (induced by 12% polyethylene glycol) was studied after 48 h and 72 h. In the absence of exogenous GA, drought-stressed wheat seedlings showed various physiological and biochemical changes in a time-dependent manner. Malondialdehyde (MDA), hydrogen peroxide (H2O2) and free proline (Pro) concentrations were increased, whereas catalase (CAT) and ascorbate peroxidase (APX) activities were reduced under drought stress. Gibberellic acid played a role in restoring the ascorbate (AsA) level, decreased the reduced/oxidized glutathione (GSH/GSSG) ratio and reduced monodehydroascorbate reductase (MDHAR) and dehydroascorbate reductase (DHAR) activities. Gibberellic acid significantly affected the glyoxalase system. Under drought stress, the methylglyoxal (MG) concentration was increased but GA application stimulated glyoxalase I (Gly I) and glyoxalase II (Gly II) activities to protect the wheat seedlings against stress. The study concluded that the severity of drought stress in wheat depends on the growth stage and it increases with an increase in the duration of stress, whereas exogenous GA helped the seedlings to survive by upregulating antioxidant defense mechanisms and the glyoxalase system. |
topic |
osmotic stress reactive oxygen species antioxidant phytohormones glyoxalase |
url |
https://pbsociety.org.pl/journals/index.php/aa/article/view/8425 |
work_keys_str_mv |
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