Responses of the antioxidative enzymes in Malaysian rice (Oryza sativa L.) cultivars under submergence condition

Damanik, Revandy Iskandar and Mahmood, Maziah and Ismail, Mohd Razi and Ahmad, Syahida and Zain, Abd Mohd (2010) Responses of the antioxidative enzymes in Malaysian rice (Oryza sativa L.) cultivars under submergence condition. Acta Physiologiae Plantarum, 32 (4). pp. 739-747. ISSN 0137‐5881

Full text not available from this repository.

Abstract

The potential involvement of activated oxygen species by submergence stress was studied in two Malaysian rice cultivars, MR219-4 and MR219-9, and cultivar FR13A that is known to be tolerant to submergence. Seedlings of these three rice cultivars were subjected to different submergence periods (4, 8, and 12 days). Under 8 days of complete submergence, FR13A cultivar showed higher lipid peroxidation in terms of malondialdehyde level and activities of antioxidative enzymes, superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) when compared to the MR219-4 and MR219-9 cultivars. MR219-9 showed higher SOD, APX, and GR activities after 12 days of submergence. The levels of SOD activity indicated that detoxification of O2 - to H2O2 was maintained at a stable level throughout the submergence stress until up to 8 days and increased rapidly at 12 days of submergence. The results indicated that tolerance to submergence in rice is associated until 8 days submergence for MR219-4 and FR13A cultivars. These findings suggested that tolerance to submergence stress in rice might be proven by increased the capacity of antioxidative system. In addition, CAT activity has much higher affinity for scavenges H2O2 than APX. Therefore, ascorbate glutathione cycle might be more efficient to scavenge H2O2.

Item Type:Article
Keyword:Antioxidant enzymes, Lipid peroxidase, Cultivars, Periods of stress, Rice, Submergence stress
Faculty or Institute:Faculty of Agriculture
DOI Number:10.1007/s11738-009-0456-3
ID Code:11687
Deposited By: Norhazura Hamzah
Deposited On:12 Apr 2011 00:50
Last Modified:30 Oct 2011 04:53

Repository Staff Only: item control page

Document Download Statistics

This item has been downloaded for since 12 Apr 2011 00:50.

View statistics for "Responses of the antioxidative enzymes in Malaysian rice (Oryza sativa L.) cultivars under submergence condition "


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.