Results 191 to 200 of about 32,132 (230)

Ascorbate–Glutathione Cycle: Controlling the Redox Environment for Drought Tolerance

2016
Drought impact on plants, similar to other abiotic stresses, is accompanied by increased levels of reactive oxygen species (ROS) such as hydrogen peroxide (H2O2), hydroxyl radical (.OH) and superoxide anion (O2−). Survival strategies of plants under stress conditions often involve antioxidant defense activation. The nonenzymatic antioxidants ascorbate (
Lyuben Zagorchev, Denitsa Teofanova, Mariela Odjakova   +2 more
openaire   +1 more source

Responses of the Xanthophyll Cycle Pool and Ascorbate–Glutathione Cycle to Ozone Stress in Two Tobacco Cultivars

Free Radical Research, 1999
Plants of Nicotiana tabacum (O3-tolerant cv Bel-B and O3-sensitive cv Bel-W3) were exposed to 150 ppb of ozone for 5 h; the fumigation produced visual injury in mature leaves, particularly in Bel-W3. After O3-treatment the pigments of the xanthophyll cycle pool decreased in both cvs, with a strong reduction in violaxanthin content, while antheraxanthin
S, Pasqualini, P, Batini, L, Ederli, M, Antonielli   +3 more
openaire   +2 more sources

Regulation of the ascorbate-glutathione cycle in wild almond during drought stress

Russian Journal of Plant Physiology, 2011
In wild species of almond (Prunus spp.), the activities of ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), and glutathione reductase (GR), as well as the levels of ascorbate/glutathione pools and H2O2 were subjected to water deficit and shade conditions. After 60 days of water shortage, the species
Sorkheh K, Shiran B, Rouhi V, Khodambashi M, SOFO, Adriano   +4 more
openaire   +2 more sources

Effect of Ascorbate-Glutathione (AsA-GSH) Cycle on Hg2+-Tolerance in Rice Mutant

Acta Agronomica Sinica, 2008
Abstract The rice (Oryza sativa L.) cultivar Zhonghua 11 and an Hg2+-tolerant rice mutant were cultured in solution for investigating the reactive oxygen species (ROS) metabolism and the dynamic change of ascorbate-glutathione (AsA-GSH) cycle in response to 0.4 mmol L−1 Hg2+ treatment. The evolution rate of superoxide radical (O2) and the contents of
Bin ZENG, Fei-Juan WANG, Cheng ZHU, Zong-Xiu SUN   +3 more
openaire   +1 more source

Heat shock induces cross adaptation to aluminum stress through enhancing ascorbate-glutathione cycle in wheat seedlings

Chemosphere, 2021
Aluminum (Al), a neurotoxin agent, is universal in the earth crust, but its bioavailability and toxicity are manifested under acidic conditions. Up to 60% of the acid soils are distributed in tropical and subtropical regions, where crops simultaneously experience heat-shock stress. Here, we investigated the effects of heat shock-priming on Al tolerance
Wenjing Liu, Lin Huang, Xin Liang, Lijuan Liu, Chengliang Sun, Xianyong Lin   +5 more
openaire   +2 more sources

Response of the ascorbate–glutathione cycle to excess copper in Arabidopsis thaliana (L.)

Plant Science, 2003
Abstract An operation of the ascorbate–glutathione cycle was investigated in leaves of Arabidopsis thaliana treated with excess Cu (0, 5, 25 50 and 100 μM) for 1, 3 and 7 days. After one-day-treatment significant increase of dehydroascorbate reductase (DHAR) activity and decrease of GSH level was found independently on Cu concentration. Activity of
Maria Drążkiewicz, Ewa Skórzyńska-Polit, Zbigniew Krupa   +2 more
openaire   +1 more source

Sulphur and calcium attenuate arsenic toxicity inBrassicaby adjusting ascorbate–glutathione cycle and sulphur metabolism

Plant Growth Regulation, 2020
Present study was performed in order to explicate whether added sulphur (S; 60 mg S kg−1 sand) and calcium (Ca; 250 mg Ca kg−1 sand) alone and in combination could modulate arsenic-induced (As1; 15 mg As kg−1 sand and As2; 30 mg As kg−1 sand) toxicity in Brassica juncea L. seedlings. To study this, growth and growth regulating processes i.e.
Rachana Singh, Parul Parihar, Sheo Mohan Prasad   +2 more
openaire   +1 more source

The effect of Botrytis cinerea infection on ascorbate-glutathione cycle in tomato leaves

Plant Science, 1999
Changes in the total pool sizes of ascorbate and glutathione and their degree of oxidation as well as the activities of ascorbate peroxidase, dehydroascorbate reductase, glutathione reductase and glutathione transferase in tomato leaves after Botrytis cinerea infection have been studied.
Elżbieta Kuźniak, Maria Skłodowska
openaire   +1 more source

Delayed senescence of apple leaves by exogenous melatonin treatment: toward regulating the ascorbate–glutathione cycle

Journal of Pineal Research, 2011
Abstract:  The objectives of this study were to test the effects of exogenous melatonin on apple (Malus domestica Borkh. cv. Golden Delicious) leaves and investigate its possible physiological role in delaying leaf senescence. Detached leaves treated with 10 mm melatonin solutions clearly showed a slowing in their process of dark‐induced senescence, as
Ping, Wang, Lihua, Yin, Dong, Liang, Chao, Li, Fengwang, Ma, Zhiyong, Yue   +5 more
openaire   +2 more sources

Ascorbate–glutathione cycle of mitochondria in osmoprimed soybean cotyledons in response to imbibitional chilling injury

Journal of Plant Physiology, 2011
Osmopriming treatment of chilling-sensitive soybean (Glycine max L. cv. Zhonghuang-22) seeds for 72h at 25°C with polyethylene glycol (PEG8000) solution at -1.5MPa strongly improves chilling resistance. The aim of the present work was to investigate whether the beneficial effect of osmopriming is associated with restoration of the ascorbate-glutathione
Haiping, Sun, Lin, Li, Xu, Wang, Sen, Wu, Xiaofeng, Wang   +4 more
openaire   +2 more sources