Comparison of cadmium-induced iron-deficiency responses and genuine iron-deficiency responses in Malus xiaojinensis

Chao Gao; Yi Wang; Da-Shuang Xiao; Chang-Peng Qiu; De-Guo Han; Xin-Zhong Zhang; Ting Wu; Zhen-Hai Han

doi:10.1016/j.plantsci.2011.05.014

Comparison of cadmium-induced iron-deficiency responses and genuine iron-deficiency responses in Malus xiaojinensis

Plant Sci. 2011 Sep;181(3):269-74. doi: 10.1016/j.plantsci.2011.05.014. Epub 2011 May 31.

Authors

Chao Gao¹, Yi Wang, Da-Shuang Xiao, Chang-Peng Qiu, De-Guo Han, Xin-Zhong Zhang, Ting Wu, Zhen-Hai Han

Affiliation

¹ Institute for Horticultural Plants, China Agricultural University, Yuanmingyuan West Road, Haidian District, Beijing 100193, PR China.

PMID: 21763537
DOI: 10.1016/j.plantsci.2011.05.014

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cadmium / metabolism
Cadmium / toxicity*
FMN Reductase / biosynthesis
FMN Reductase / genetics
FMN Reductase / metabolism
Gene Expression Regulation, Plant / drug effects
Genes, Plant / drug effects
Iron / metabolism
Iron Deficiencies*
Malus / drug effects*
Malus / genetics
Malus / metabolism*
Plant Roots / metabolism

Substances

Cadmium
Iron
FMN Reductase
ferric citrate iron reductase