Record ID No. |
2514 |
Author(s) |
Gong HongMei., Shen Ye. , 2010 |
Affiliation |
Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo, He., gonghm0701@yahoo.com.cn |
Title |
Research progress in mechanisms of plant tolerance to zinc |
Source. Vol.(no):Page |
Acta Botanica Boreali-Occidentalia Sinica. 30(3):633-644p. |
Categories |
Mycorrhiza General |
Subjects |
Soil plant relations |
Sub-subjects |
Heavy Metals |
Host |
Plants |
Organism |
Mycorrhiza |
Country |
China., Asia |
Abstracts |
Zinc (Zn) is not only an essential element for plant growth, but also a poisonous heavy metal element. Plant has developed some functions for Zn2+ tolerance. Mycorrhizae and cellular membranes are key factors that regulate Zn uptake. The trans-membrane transporters have been fully researched. Such as the ZIP (ZAT IRT related proteins) family, CDF (Cation diffusion facilitator) family and B-type ATPase (Heavy metal ATPase, HMA). The primary chelators of Zn in plants are metallothioneins (MTs), phytochelatins (PCs) and organic acids. They alleviate the toxity of zinc in plants by chelation. Intracellular sequestration and metabolic regulation by stimulating antioxidant systems and osmotic adjustment to minimize the damage from exposure to zinc stress. The article reviews recent advances in understanding the mechanisms of zinc tolerance in higher plants at the physiological and molecular level. Existing problems and major topics of future research were also discussed. |