عنوان مقاله :
Effects of drought stress during seed development and subsequent accelerated ageing on wheat seed mitochondrial ultra-structure, seedling antioxidant enzymes, and malondialdehyde
پديد آورندگان :
Saeed، Moori Department of Agronomy and Plant Breeding - Lorestan University , Hamid Reza، Eisvand Department of Agronomy and Plant Breeding - Lorestan University , Ahmad، Ismaili Department of Agronomy and Plant Breeding - Lorestan University , Shahryar، Sasani Horticulture Crops Research Department - Kermanshah Agricultural and Natural Resources Research and Education Center - AREEO, Kermanshah
كليدواژه :
Accelerated ageing , Antioxidant defense , Late-season drought stress , Seed physiology , Triticum aestivum L
چكيده لاتين :
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.
عنوان نشريه :
فرآيند و كاركرد گياهي
عنوان نشريه :
فرآيند و كاركرد گياهي
