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Reducing cadmium accumulation in plants: Structure-function relations and tissue-specific operation of transporters in the spotlight

Citation

Huang, X and Duan, S and Wu, Q and Yu, M and Shabala, S, Reducing cadmium accumulation in plants: Structure-function relations and tissue-specific operation of transporters in the spotlight, Plants, 9, (2) Article 223. ISSN 2223-7747 (2020) [Refereed Article]


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Copyright 2020 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/plants9020223

Abstract

Cadmium (Cd) is present in many soils and, when entering the food chain, represents a major health threat to humans. Reducing Cd accumulation in plants is complicated by the fact that most known Cd transporters also operate in the transport of essential nutrients such as Zn, Fe, Mn, or Cu. This work summarizes the current knowledge of mechanisms mediating Cd uptake, radial transport, and translocation within the plant. It is concluded that real progress in the field may be only achieved if the transport of Cd and the above beneficial micronutrients is uncoupled, and we discuss the possible ways of achieving this goal. Accordingly, we suggest that the major focus of research in the field should be on the structureâ€"function relations of various transporter isoforms and the functional assessment of their tissue-specific operation. Of specific importance are two tissues. The first one is a xylem parenchyma in plant roots; a major “controller” of Cd loading into the xylem and its transport to the shoot. The second one is a phloem tissue that operates in the last step of a metal transport. Another promising and currently underexplored avenue is to understand the role of non-selective cation channels in Cd uptake and reveal mechanisms of their regulation.

Item Details

Item Type:Refereed Article
Keywords:cadmium toxicity, membrane transport, tissue tolerance, NRAMP, IRT, MTP, nonselective cation channel, heavy metal, vacuolar sequestration, membrane transporter
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Other plant production and plant primary products
Objective Field:Other plant production and plant primary products not elsewhere classified
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:139478
Year Published:2020
Web of Science® Times Cited:11
Deposited By:Agriculture and Food Systems
Deposited On:2020-06-17
Last Modified:2020-07-24
Downloads:1 View Download Statistics

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