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HERO ID
3110359
Reference Type
Journal Article
Title
Involvement of abscisic acid in regulating antioxidative defense systems and IAA-oxidase activity and improving adventitious rooting in mung bean [Vigna radiata (L.) Wilczek] seedlings under cadmium stress
Author(s)
Li, S; Leng, Yan; Feng, Lin; Zeng, XY
Year
2014
Is Peer Reviewed?
Yes
Journal
Environmental Science and Pollution Research
ISSN:
0944-1344
EISSN:
1614-7499
Volume
21
Issue
1
Page Numbers
525-537
Language
English
PMID
23812737
DOI
10.1007/s11356-013-1942-0
Web of Science Id
WOS:000329095300048
Abstract
In vitro experiments were conducted to investigate the effects of abscisic acid (ABA) and Cd on antioxidative defense systems and indole-3-acetic acid (IAA) oxidase during adventitious rooting in mung bean [Vigna radiata (L.) Wilczek] seedlings. The exogenous ABA significantly enhanced the number and fresh weight of the adventitious roots. CdCl2 strongly inhibited adventitious rooting. Pretreatment with 10 mu M ABA clearly alleviated the inhibitory effect of Cd on rooting. ABA significantly reduced superoxide dismutase (SOD), ascorbate peroxidase (APX), peroxidase (POD), and catalase (CAT) activities, as well as the levels of glutathione (GSH) and ascorbic acid (ASA) during adventitious rooting. ABA strongly increased IAA-oxidase activity during the induction (0-12 h) and expression (after 48 h) phases and increased the phenols levels. Cd treatment significantly reduced the activities of SOD, APX, POD, and IAA oxidase, as well as GSH level. Cd strongly increased ASA levels. ABA pretreatment counteracted Cd-induced alterations of certain antioxidants and antioxidative enzymes, e.g., remarkably rescued APX and POD activities, reduced the elevated SOD and CAT activities and ASA levels, and recovered the reduced GSH levels, caused by Cd stress. Thus, the physiological effects of the combination of ABA and Cd treatments were opposite of those obtained with Cd treatment alone, suggesting that ABA involved in the regulation of antioxidative defense systems and the alleviation of wounding- and Cd-induced oxidative stress.
Keywords
Cadmium; Abscisic acid; Antioxidative enzymes; Antioxidants; Indole-3-acetic acid oxidase; Adventitious root; Vigna radiata (L.) R. Wilczek
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