Important Physiological Changes Due to Drought Stress on Oat
As temperatures rise and water availability decreases, the water decit is gaining attention regarding future agricultural production. Drought stress is a global issue and adversely affects the productivity of different crops. In this study, drought-tolerant varieties of oats were screened to determi...
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doaj-611dcd01aa87438083ba7d9b9876375c2021-05-28T08:20:10ZengFrontiers Media S.A.Frontiers in Ecology and Evolution2296-701X2021-05-01910.3389/fevo.2021.644726644726Important Physiological Changes Due to Drought Stress on OatHongying Xie0Mengran Li1Youjun Chen2Qingping Zhou3Qingping Zhou4Wenhui Liu5Guoling Liang6Zhifeng Jia7Key Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, ChinaInstitute of the Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, ChinaInstitute of the Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, ChinaKey Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, ChinaInstitute of the Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, ChinaKey Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, ChinaKey Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, ChinaKey Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, ChinaAs temperatures rise and water availability decreases, the water decit is gaining attention regarding future agricultural production. Drought stress is a global issue and adversely affects the productivity of different crops. In this study, drought-tolerant varieties of oats were screened to determine drought-tolerant varieties that may be employed in drought-prone areas to achieve sustainable development and mitigate the impact of climate change. To do so, the growth and stress adaptive mechanism of 15 domestic and overseas oat cultivars at the seedling stage were analyzed. Water stress was simulated using 20% polyethylene glycol (PEG-6000). The results showed that the soluble protein content and superoxide dismutase activity of variety DY2 significantly increased under drought stress, whereas the photochemical efficiency and relative water content decreased slightly. The relative electrical conductivity (REC) and drought damage index of the QH444 and DY2 varieties increased the least. The peroxidase content of Q1 and DY2 significantly increased, and the catalase activity of Q1, QH444, and DY2 also substantially increased. Principal component analysis revealed that nine physiological and biochemical parameters were transformed into three independent comprehensive indexes. The comprehensive evaluation results showed that DY2, LN, and Q1 exhibited a strong drought resistance capacity and could be used as a reference material for a drought-resistant oat breeding program. The gray correlation analysis also indicated that Fv/Fm, chlorophyll, REC, and malondialdehyde could be used as key indexes for evaluating the drought resistance of oat.https://www.frontiersin.org/articles/10.3389/fevo.2021.644726/fulloatdrought tolerantphysiological indexcomprehensive evaluationQinghai-Tibetan Plateau |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hongying Xie Mengran Li Youjun Chen Qingping Zhou Qingping Zhou Wenhui Liu Guoling Liang Zhifeng Jia |
spellingShingle |
Hongying Xie Mengran Li Youjun Chen Qingping Zhou Qingping Zhou Wenhui Liu Guoling Liang Zhifeng Jia Important Physiological Changes Due to Drought Stress on Oat Frontiers in Ecology and Evolution oat drought tolerant physiological index comprehensive evaluation Qinghai-Tibetan Plateau |
author_facet |
Hongying Xie Mengran Li Youjun Chen Qingping Zhou Qingping Zhou Wenhui Liu Guoling Liang Zhifeng Jia |
author_sort |
Hongying Xie |
title |
Important Physiological Changes Due to Drought Stress on Oat |
title_short |
Important Physiological Changes Due to Drought Stress on Oat |
title_full |
Important Physiological Changes Due to Drought Stress on Oat |
title_fullStr |
Important Physiological Changes Due to Drought Stress on Oat |
title_full_unstemmed |
Important Physiological Changes Due to Drought Stress on Oat |
title_sort |
important physiological changes due to drought stress on oat |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Ecology and Evolution |
issn |
2296-701X |
publishDate |
2021-05-01 |
description |
As temperatures rise and water availability decreases, the water decit is gaining attention regarding future agricultural production. Drought stress is a global issue and adversely affects the productivity of different crops. In this study, drought-tolerant varieties of oats were screened to determine drought-tolerant varieties that may be employed in drought-prone areas to achieve sustainable development and mitigate the impact of climate change. To do so, the growth and stress adaptive mechanism of 15 domestic and overseas oat cultivars at the seedling stage were analyzed. Water stress was simulated using 20% polyethylene glycol (PEG-6000). The results showed that the soluble protein content and superoxide dismutase activity of variety DY2 significantly increased under drought stress, whereas the photochemical efficiency and relative water content decreased slightly. The relative electrical conductivity (REC) and drought damage index of the QH444 and DY2 varieties increased the least. The peroxidase content of Q1 and DY2 significantly increased, and the catalase activity of Q1, QH444, and DY2 also substantially increased. Principal component analysis revealed that nine physiological and biochemical parameters were transformed into three independent comprehensive indexes. The comprehensive evaluation results showed that DY2, LN, and Q1 exhibited a strong drought resistance capacity and could be used as a reference material for a drought-resistant oat breeding program. The gray correlation analysis also indicated that Fv/Fm, chlorophyll, REC, and malondialdehyde could be used as key indexes for evaluating the drought resistance of oat. |
topic |
oat drought tolerant physiological index comprehensive evaluation Qinghai-Tibetan Plateau |
url |
https://www.frontiersin.org/articles/10.3389/fevo.2021.644726/full |
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