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Aluminium tolerance in barley (Hordeum vulgare L.): physiological mechanisms, genetics and screening methods

journal contribution
posted on 2023-05-16, 17:54 authored by Wang, Junping, Raman, H, Zhang, GP, Neville MendhamNeville Mendham, Meixue ZhouMeixue Zhou
Aluminium (Al) toxicity is one of the major limiting factors for barley production on acid soils. It inhibits root cell division and elongation, thus reducing water and nutrient uptake, consequently resulting in poor plant growth and yield. Plants tolerate Al either through external resistance mechanisms, by which Al is excluded from plant tissues or internal tolerance mechanisms, conferring the ability of plants to tolerate Al ion in the plant symplasm where Al that has permeated the plasmalemma is sequestered or converted into an innocuous form. Barley is considered to be most sensitive to Al toxicity among cereal species. Al tolerance in barley has been assessed by several methods, such as nutrient solution culture, soil bioassay and field screening. Genetic and molecular mapping research has shown that Al tolerance in barley is controlled by a single locus which is located on chromosome 4H. Molecular markers linked with Al tolerance loci have been identified and validated in a range of diverse populations. This paper reviews the (1) screening methods for evaluating Al tolerance, (2) genetics and (3) mechanisms underlying Al tolerance in barley.

Funding

Grains Research & Development Corporation

History

Publication title

Journal of Zhejiang University Science B

Volume

7

Issue

10

Pagination

769-787

ISSN

1673-1581

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Zhejiang University Press

Place of publication

China

Repository Status

  • Restricted

Socio-economic Objectives

Barley

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