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Effects of Drought Stress During Seed Development and Subsequent Accelerated Ageing on Wheat Seed Mitochondrial Ultra-Structure, Seedling Antioxidant Enzymes, and Malondialdehyde
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نویسنده
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Moori Saeed ,Eisvand Hamid Reza ,Ismaili Ahmad ,Sasani Shahryar
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منبع
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فرآيند و كاركرد گياهي - 2019 - دوره : 7 - شماره : 28 - صفحه:1 -8
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چکیده
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In this experiment, wheat plants were exposed to drought stress during seed development and then we worked on the obtained seeds. the seed mitochondrial ultra-structure, and antioxidant enzymes in seedling were investigated after exposure to seed accelerated ageing. drought stress during seed development induced some changes in mitochondrial ultra-structure. encountering seed development to drought stress decreased antioxidant enzymes activity but increased h2o2 in the seedling. seed accelerated ageing declined antioxidant enzyme activity but increased malondialdehyde. also, mitochondrial ultra-structure showed heavy damage after accelerated ageing. most damages in mitochondrial ultra-structure were observed in the seeds obtained from drought-stressed plants then exposed to accelerated ageing. a swollen form of mitochondria with less crista was observed in the seeds that were exposed to accelerated ageing. damage to mitochondria may be the main cause for seed ageing. however, the activity of antioxidant enzymes is a key factor in order to repair the damage and inhibit the lipid peroxidation resulted in maintaining cell membrane integrity in aged wheat seeds.
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کلیدواژه
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Accelerated Ageing ,Antioxidant Defense ,Late-Season Drought Stress ,Seed Physiology ,Triticum Aestivum L.
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آدرس
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Lorestan University, Department Of Agronomy And Plant Breeding, ایران, Lorestan University, Department Of Agronomy And Plant Breeding, ایران, Lorestan University, Department Of Agronomy And Plant Breeding, ایران, Agricultural Research,Education And Extension Organization (Areeo), Kermanshah Agricultural And Natural Resources Research And Education Center, Horticulture Crops Research Department, ایران
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Effects of Drought Stress during Seed Development and Subsequent Accelerated Ageing on Wheat Seed Mitochondrial Ultra-structure, Seedling Antioxidant Enzymes, and Malondialdehyde
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Authors
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Ismaili Ahmad ,Eisvand Hamid Reza ,Moori Saeed ,Sasani Shahryar
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Abstract
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In this experiment, wheat plants were exposed to drought stress during seed development then we worked on the obtained seeds. The seed mitochondrial ultrastructure, and antioxidant enzymes in seedling were investigated after exposure to seed accelerated ageing. Drought stress during seed development induced some changes in mitochondrial ultrastructure. Encountering seed development to drought stress decreased antioxidant enzymes activity and increased H2O2 in the seedling. Seed accelerated ageing declined antioxidant enzyme activity and increased malondialdehyde. Mitochondrial ultrastructure also showed heavy damage after accelerated ageing. Most damages in mitochondrial ultrastructure were observed in the seeds obtained from droughtstressed plants then exposed to accelerated ageing. A swollen form of mitochondria with less crista was observed in the seed that exposed to accelerated aging. Damage to mitochondria may be the main cause for seed ageing. However, the activity of antioxidant enzymes is a key factor in order to repair the damage and inhibit the lipid peroxidation resulted in maintaining cell membrane integrity in aged wheat seeds.
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Keywords
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accelerated ageing ,antioxidant defense ,late-season drought stress ,seed physiology ,Triticum aestivum L.
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