期刊
PLANT SCIENCE
卷 181, 期 3, 页码 269-274出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2011.05.014
关键词
Malus xiaojinensis; Cd treatment; Rhizosphere acidification; Fe(III) chelate reductase activity; Fe-deficiency-responsive genes
资金
- National Natural Science Foundation of China [30700545]
- National Transgenic Special Project [2009ZX08009-122B]
- New Stars on Science and Technology of Beijing [2008B74]
The effects of the heavy metal Cd in Malus xiaojinensis were investigated using hydroponic cultures. Chlorophyll and Fe concentrations in young leaves were markedly decreased by Cd treatment. although Fe concentration was significantly enhanced in the roots. A comparative examination of the Fe-deficiency responses due to Fe deficiency and Cd treatment was also performed. Both Fe deficiency and Cd treatment induced responses similar to those of Fe-deficiency in M. xiaojinensis, including acidification of the rhizosphere, enhanced Fe(III) chelate reductase activity, and upregulation of the Fe-deficiency-responsive genes MxIRT1 and MxFRO2-Like. However, the Fe-deficiency responses induced by Cd treatment were different in intensity and timing from those induced by Fe deficiency. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
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