Comparative Physiological and Proteomic Analysis Reveals the Leaf Response to Cadmium-Induced Stress in Poplar (Populus yunnanensis)

PloS One
Yunqiang YangYongping Yang

Abstract

Excess amounts of heavy metals are important environmental pollutants with significant ecological and nutritional effects. Cdmium (Cd) is of particular concern because of its widespread occurrence and high toxicity. We conducted physiological and proteomic analyses to improve our understanding of the responses of Populus yunnanensis to Cd stress. The plantlets experienced two apparent stages in their response to Cd stress. During the first stage, transiently induced defense-response molecules, photosynthesis- and energy-associated proteins, antioxidant enzymes and heat shock proteins (HSPs) accumulated to enhance protein stability and establish a new cellular homeostasis. This activity explains why plant photosynthetic capability during this period barely changed. During the second stage, a decline of ribulose-1, 5-bisphosphate carboxylase (RuBisCO) and HSP levels led to imbalance of the plant photosynthetic system. Additionally, the expression of Mitogen-activated protein kinase 3 (MPK3), Mitogen-activated protein kinase 6 (MPK6) and a homeobox-leucine zipper protein was higher in the second stage. Higher expression of caffeoyl-CoA O-methyltransferase (CCoAOMT) may regulate plant cell wall synthesis for greater Cd storage. The...Continue Reading

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Citations

Jan 15, 2018·Environmental Science and Pollution Research International·Paweł KaszyckiWojciech Wesołowski
Jan 4, 2018·International Journal of Molecular Sciences·Sowbiya MuneerByoung Ryong Jeong
Sep 25, 2017·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Swapan Kumar RoySun-Hee Woo
Feb 10, 2019·International Journal of Molecular Sciences·María-Dolores ReyJesús V Jorrín-Novo
Nov 17, 2019·International Journal of Molecular Sciences·Saeed Ul HaqZhen-Hui Gong
Jul 3, 2019·International Journal of Molecular Sciences·Mirza HasanuzzamanMasayuki Fujita

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electrophoresis
MDA
proteomic profiling

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