Publication: Drought and heat affect common bean minerals and human diet— What we know and where to go
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2021-12-03
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NRF
Publisher
John Wiley & Sons Ltd.
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Abstract
Global climate change, causing large parts of the world to become drier with
longer drought periods, severely affects production of common beans (Phaseolus
vulgaris L.). The bean is worldwide the most produced and consumed food grain
legume in the human diet. In common beans, adapted to moderate climates, ex
posure to drought/heat stress not only results in significant reduction of bean
yield but also the nutritional value. This review explores the contribution of com
mon beans to food and nutrient security as well as health. Also discussed is the
existing knowledge of the impact of drought/heat stress, associated with a chang
ing climate, specifically on iron (Fe) and phytic acid (PA) that are both among
the most important mineral and anti- nutritional compounds found in common
beans. Further discussed is how the application of modern “omics” tools con
tributes in common beans to higher drought/heat tolerance as well as to higher
Fe and reduced PA content. Finally, possible future actions are discussed to de
velop new common bean varieties with both improved drought/heat tolerance
and higher mineral (Fe) content.
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Keywords
antinutrients, biofortification, climate change, common bean, drought/heat, legumes, minerals, Phaseolus vulgaris, phytic acid, pulses