ArticlePhysiology and molecular biology of plants : an international journal of functional plant biology2011
Superoxide dismutase and ascorbate peroxidase are constitutively more thermotolerant than other antioxidant enzymes in Chenopodium album.
Article in Physiology and molecular biology of plants : an international journal of functional plant biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed, 21 citations in OpenAlex.
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- Enhanced oxidative stress, damage and inadequate antioxidant defense contributes towards insufficient recovery in water deficit stress and heat stress combination compared to either stresses alone inPhysiology and molecular biology of plants : an international journal of functional plant biology · 2020Article
- Response of Tradescantia plants to oxidative stress induced by heavy metal pollution of soils from industrial areas.Environmental science and pollution research international · 2019Article
- Leishmanicidal Activity of Biogenic Fe₃O₄ Nanoparticles.Scientia pharmaceutica · 2017Article
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2 authors at 1 institution in 1 country.
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Abstract
Thermal stability of antioxidant defense enzymes was investigated in leaf and inflorescence of heat adaptive weed Chenopodium album. Leaf samples were taken at early and late seedling stage in December (LD, 20 °C/4 °C) and March (LM, 31 °C/14 °C). Young inflorescence (INF) was sampled at flowering in April (40 °C/21 °C). LD, LM and INF crude protein extracts were subjected to elevated temperatures (5 to 100 °C) for 30'. Superoxide dismutase (SOD) was the most heat stable enzyme followed by Ascorbate peroxidase (APX). Two heat stable SOD isozymes were visible on native-PAGE at 100 °C in both leaf and INF. Some heat stable APX isozymes were more abundant in INF than leaf. Thermostability of catalase (CAT) increased with age and increasing ambient temperatures in leaves. CAT activity was observed up to 60 °C in leaves and INF while peroxidase (POX) retained activity up to 100 °C in INF due to one thermostable isozyme. Glutathione reductase (GR), dehydroascorbate reductase (DHAR, EC 1.8.5.1) and monodehydroascorbate reductase (MDHAR) showed activity up to 70 °C in both leaves and INF. DHAR activity was stable up to 60 °C while GR and MDHAR declined sharply after 40 °C. Constitutive heat stable isozymes of SOD and APX in leaves and INF may contribute towards heat tolerance in C. album.
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