Effects of triacontanol on ascorbate-glutathione cycle in Brassica napus L. exposed to cadmium-induced oxidative stress.

Autor: Asadi Karam E; Biology Department, Shahid Bahonar University of Kerman, Kerman, Iran., Maresca V; Biology Department, University of Naples 'Federico II', via Cinthia, 80126 Naples, Italy., Sorbo S; Ce.S.M.A, Microscopy Section, University of Naples Federico II, via Cinthia, 80126 Naples, Italy., Keramat B; Biology Department, Shahid Bahonar University of Kerman, Kerman, Iran., Basile A; Biology Department, University of Naples 'Federico II', via Cinthia, 80126 Naples, Italy. Electronic address: adbasile@unina.it.
Jazyk: angličtina
Zdroj: Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2017 Oct; Vol. 144, pp. 268-274. Date of Electronic Publication: 2017 Jun 20.
DOI: 10.1016/j.ecoenv.2017.06.035
Abstrakt: The ability of exogenous triacontanol (TRIA), a plant growth regulator, to reduce Cd toxicity was studied in canola (Brassica napus L.) plants. The following biological parameters were examined in canola seedlings to investigate TRIA-induced tolerance to Cd toxicity: seedling growth, chlorophyll damage and antioxidant response. In particular, TRIA application reduced Cd-induced oxidative damage, as shown by reduction of ROS content, lipoxygenase (LOX) activity and lipid peroxidation level. TRIA pretreatment increased non-enzymatic antioxidant contents (ascorbate, AsA, glutathione and GSH), phytochelatin content (PCs) and activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), monodehydroascorbate reductase (MDHAR), dehydro ascorbate reductase (DHAR), and glutathione reductase (GR), so reducing the oxidative stress. These results clearly indicate the protective ability of TRIA to modulate the redox status through the antioxidant pathway AGC and GSH, so reducing Cd-induced oxidative stress.
(Copyright © 2017. Published by Elsevier Inc.)
Databáze: MEDLINE
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