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Growing More Potatoes with Less Water

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Abstract

Demand for potato is steadily rising in developing countries, where actual per-hectare production levels reach mere fractions of the yields achieved in Europe or North America. Improving abiotic stress tolerance, e.g., against drought, could increase these low potato yields and thus help to satisfy the growing demand for this crop. Hypotheses about genes and traits that could mitigate yield decreases caused by drought have been driven by information obtained from model plants and have recently been complemented with data of high throughput gene expression profiling and metabolite studies on potato genotypes under water stress. Principal tolerance traits that could diminish the vulnerability of potato yields to drought stress include improved detoxification of reactive oxygen species produced during stress, optimized stomatal control under drought to reduce water loss but at the same time allow for continuous CO2 access for photosynthesis, and mechanisms to protect proteins and membranes from damage by water stress. Candidate genes underlying these traits as well as genotypes that express them are available and, after appropriate validation, could be used for breeding.

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Abbreviations

ABA:

Abscisic acid

HSP:

Heat-shock protein

LEA:

Late embryo abundant

masl:

Meters above sea level

ROS:

Reactive oxygen species

SNP:

Single nucleotide polymorphism

WUE:

Water use efficiency

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Acknowledgements

Many thanks to all collaborators and colleagues who contributed data and information for this review and to the two anonymous reviewers of this paper for their helpful comments. The work performed at CIP cited in this review has been supported by the governments of Austria and Luxembourg and by the Generation Challenge Program.

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  1. International Potato Center, Avenida La Molina 1895, Apartado 1558, La Molina, Lima, Peru

    Roland Schafleitner

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Schafleitner, R. Growing More Potatoes with Less Water. Tropical Plant Biol. 2, 111–121 (2009). https://doi.org/10.1007/s12042-009-9033-6

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