Abstract:The changes in three endogenous hormones, phytohormones gibberrelic acid (GA3), indoles-3-acid (IAA) and abscisic acid (ABA), were studied around germination and under tress of different density of Pb2+ between two species of Ammopiptanathus. It was found that (1) around germination, in Xinjiang Ammopiptanthus the rate IAA decreased 77.80%, and the rate of ABA decreased 98.90%; and in Mongolia Ammopiptanthus the rate of IAA decreased 75.80%, the rate of ABA decreased 66.20%, and the GA3 contents in both had no big change. (2) With the increase in Pb2+ concentration (20-1 500 mg·L-1), the IAA decreased significantly; and only under the high density (more than 1 000 mg·L-1) of Pb2+, the GA3 was affected by it; the ABA did not change regularly. So the three endogenous hormone levels of Mongolia Ammopiptanthus were higher than those of Xinjiang Ammopiptanthus.(3)the distributions of Pb2+ in Ammopiptanthus seedlings are the root>stems>leaves. (4) the stress of high concentration of Pb2+ damages irreversibly the leaf cells of Ammopiptanthus. This study can provide the basis of reference data for further research on the growth characteristics, resilience and the mechanism of specific broad-leaved evergreen shrubs-Ammopiptanthus in desertification area.
郑春霞,陈波浪,贾宏涛,盛建东*,潘新燕 . 发芽前后和Pb2+ 胁迫下两种沙冬青幼苗内源激素含量的比较分析 [J]. 光谱学与光谱分析, 2010, 30(03): 820-824.
ZHENG Chun-xia, CHEN Bo-lang, JIA Hong-tao, SHENG Jian-dong*, PAN Xin-yan . Comparative Analysis of Endogenous Hormones between Two Species of Ammopiptanthus Seedlings around Germination and under Pb2+ Stress . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(03): 820-824.
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