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Opportunities for improving waterlogging tolerance in cereal crops—Physiological traits and genetic mechanisms

Tong, C., Hill, C.B.ORCID: 0000-0002-6754-5553, Zhou, G., Zhang, X-Q, Jia, Y. and Li, C. (2021) Opportunities for improving waterlogging tolerance in cereal crops—Physiological traits and genetic mechanisms. Plants, 10 (8). Article 1560.

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Abstract

Waterlogging occurs when soil is saturated with water, leading to anaerobic conditions in the root zone of plants. Climate change is increasing the frequency of waterlogging events, resulting in considerable crop losses. Plants respond to waterlogging stress by adventitious root growth, aerenchyma formation, energy metabolism, and phytohormone signalling. Genotypes differ in biomass reduction, photosynthesis rate, adventitious roots development, and aerenchyma formation in response to waterlogging. We reviewed the detrimental effects of waterlogging on physiological and genetic mechanisms in four major cereal crops (rice, maize, wheat, and barley). The review covers current knowledge on waterlogging tolerance mechanism, genes, and quantitative trait loci (QTL) associated with waterlogging tolerance-related traits, the conventional and modern breeding methods used in developing waterlogging tolerant germplasm. Lastly, we describe candidate genes controlling waterlogging tolerance identified in model plants Arabidopsis and rice to identify homologous genes in the less waterlogging-tolerant maize, wheat, and barley.

Item Type: Journal Article
Murdoch Affiliation(s): College of Science, Health, Engineering and Education
Western Australian State Agricultural Biotechnology Centre
Western Crop Genetics Alliance
Publisher: MDPI
Copyright: © 2021 by the authors
URI: http://researchrepository.murdoch.edu.au/id/eprint/61737
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