Methods for metal chelation in plant homeostasis: Review.

James T Carrillo, Dulal Borthakur

Journal: Plant physiology and biochemistry : PPB 2021;163():95-107

PMID: 33826996

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Abstract

Metal uptake, transport and storage in plants depend on specialized ligands with closely related functions. Individual studies differing by species, nutrient availability, tissue type, etc. are not comprehensive enough to understand plant metal homeostasis in its entirety. A thorough review is required that distinguishes the role of ligands directly involved in chelation from the myriad of plant responses to general stress. Distinguishing between the functions of metal chelating compounds is the primary focus of this review; reactive oxygen species mediation and other aspects of metal homeostasis are also discussed. High molecular weight ligands (polysaccharides, phytochelatin, metallothionein), low molecular weight ligands (nicotianamine, histidine, secondary metabolites) and select studies which demonstrate the complex nature of plant metal homeostasis are explored.

Address: University of Hawaii at Manoa, Department of Molecular Biology and Bioengineering, 1955 East-West Road, Agricultural Sciences 218, Honolulu, HI, 96822, USA. Electronic address: [email protected].; University of Hawaii at Manoa, Department of Molecular Biology and Bioengineering, 1955 East-West Road, Agricultural Sciences 218, Honolulu, HI, 96822, USA. Electronic address: [email protected].

DOI: 10.1016/j.plaphy.2021.03.045

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MeSH Terms: Biological Transport, Homeostasis, Metals, Phytochelatins, Plants