期刊
JOURNAL OF PLANT NUTRITION
卷 32, 期 8, 页码 1255-1270出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01904160903005988
关键词
soybean; Al toxicity; oxidative stress; anti-oxidative enzymes; Al-sensitive zone
资金
- Natural Science Foundation of China (NSFC) [40771107]
- Project of New Century Excellent Talents in University [NCET-05-0448]
- Cultivation Fund of the Key Scientific and Technical Innovation Project [707027]
- Ministry of Education of China, [20070284037, 20070284061]
- Foundation for Natural Science of the Jiangsu Bureau of Science and Technology [BK2007140, BK2008265]
Seedlings of two soybean genotypes, BX10 [aluminum (Al)-tolerant] and BD2 (Al-sensitive), were treated with Al to evaluate the relative root growth (RRG), callose content, Al-sensitive zone, lipid peroxidation, and the anti-oxidative enzyme activities by histochemical and biochemical assays. Under Al toxicity, the RRG reduction of BD2 was more significant than that of BX10, while callose content displayed a contrary trend. The 2-5 mm zone of root apex was the main Al-sensitive zone for soybeans. The activities of superoxide dismutase ( SOD), peroxidase ( POD), catalase ( CAT), and ascorbate peroxidase (APX) were found to be higher in the two genotypes under Al toxicity than that of the controls. The SOD, POD, and CAT activities of BX10; however, were significantly lower than those of BD2. These results implied that producing low quantity of ROS may be one aspect of the Al-tolerant mechanism for soybeans, which in turn helps them adapt to Al stress.
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