잠시만 기다려 주세요. 로딩중입니다.

Aluminum stress in the roots of naked barley

한국식물학회지 2004년 47권 2호 p.65 ~ 65
 ( Jeong Mi-Sook ) - Hamyeol High School

김성하 ( Kim Sung-Ha ) - Korea National University of Education Department of Biology Education

Abstract


Phytotoxicity of aluminum (Al) is the major limiting factor for the crops grown in acid soils rapidly inhibiting root elongation. In this study, changes in root growth, total activity and isozyme patterns of antioxidant enzymes such as peroxidase, ascorbate peroxidase, catalase and glutathione reductase by Al stress were investigated in the roots of naked barley (Hordeum vulgare L. cv. Kwangwhalssalbori). As Al concentration increased up to 500 M, the rooting rate and root elongation substantially decreased. Growth results suggested that this cultivar is an Al-sensitive species. Total activities of antioxidant enzymes generally increased at lower Al concentrations and then gradually decreased at higher Al concentrations. They also increased when the exposure time to Al was extended up to 48 hr. Changes in the isozyme patterns of antioxidant enzymes were investigated byin situ enzyme activity staining on a non-denaturing PAGE gel. They generally coincided with the changes in the total activity in parallel. Changes in the total activity of antioxidant enzymes also coincided with the changes of the root growth. Since growth reduction in the roots by Al stress could be related with the changes in the activities of antioxidant enzymes, these results suggested that Al might cause the oxidative stress in the roots of this cultivar of naked barley.

키워드

aluminum stress; antioxidant enzyme; isozyme patterns; naked barley; root growth
원문 및 링크아웃 정보
 
등재저널 정보