Salt affects plant Cd-stress responses by modulating growth and Cd accumulation.

Planta
Jin XuXia Li

Abstract

Cadmium contamination is a serious environmental problem for modern agriculture and human health. Salinity affects plant growth and development, and interactions between salt and cadmium have been reported. However, the molecular mechanisms of salinity-cadmium interactions are not fully understood. Here, we show that a low concentration of salt alleviates Cd-induced growth inhibition and increases Cd accumulation in Arabidopsis thaliana. Supplementation with low concentrations of salt reduced the reactive oxygen species level in Cd-stressed roots by increasing the contents of proline and glutathione and down-regulating the expression of RCD1, thereby protecting the plasma membrane integrity of roots under cadmium stress. Salt supplementation substantially reduces the Cd-induced elevation of IAA oxidase activity, thereby maintaining auxin levels in Cd-stressed plants, as indicated by DR5::GUS expression. Salt supply increased Cd absorption in roots and increased Cd accumulation in leaves, implying that salt enhances both Cd uptake in roots and the root-to-shoot translocation of Cd. The elevated Cd accumulation in plants in response to salt was found to be correlated with the elevated levels of phytochelatin the expression of hea...Continue Reading

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Citations

Dec 4, 2013·International Journal of Biological Macromolecules·Shamsul HayatAqil Ahmad
Dec 6, 2011·Journal of Experimental Botany·Mudawi ElobeidAndrea Polle
Sep 22, 2010·Plant Physiology·Jin XuXiaojing Liu
Aug 14, 2012·Plant Physiology·Anna KulikGrazyna Dobrowolska
Feb 11, 2014·Ecotoxicology and Environmental Safety·Binglin ZhangGuoping Zhang
Sep 10, 2014·Ecotoxicology and Environmental Safety·Binglin ZhangGuoping Zhang
May 21, 2013·Journal of Plant Physiology·Yan Feng HuYu Rong Bi
Apr 23, 2013·Plant Signaling & Behavior·Hong-Mei YuanYing-Tang Lu
Nov 25, 2014·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Rui WangYingjin Song
Sep 16, 2016·Frontiers in Plant Science·Runqing YueShuanggui Tie
Sep 26, 2016·Functional & Integrative Genomics·Burcu AlptekinHikmet Budak
Mar 31, 2016·Environmental Science and Pollution Research International·Chengjun ZhangCaixian Tang
Nov 26, 2020·Environmental Science and Pollution Research International·Tao WangJin Cui
Jan 9, 2021·Ecotoxicology and Environmental Safety·Erna KaralijaAdisa Parić
Oct 25, 2021·The Science of the Total Environment·Zi YangKun-Ming Chen

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