Variety traits

Drought tolerance of common bean

Phaseolus vulgaris L.

Drought tolerance in common bean is a complex trait that defines the ability of plants to maintain productivity and grain quality under water stress, particularly during the flowering and seed-filling stages.

In the reference 16 varieties crop Common bean, where this is mentioned in the description.

To assess the drought tolerance of common beans, a comparative analysis of yields under moisture deficit conditions and optimal irrigation is used. Key morphophysiological indicators include changes in 1000-seed weight, the number of pods and seeds per plant, and the preservation of grain protein composition.

At the molecular level, bean tolerance is linked to the expression of specific proteins, such as LEA14 and PCC13-62, which contribute to the stabilization of cellular structures during dehydration. Highly tolerant genotypes are capable of maintaining stable productivity indices, whereas less tolerant accessions show a sharp decrease in fruit weight and a decline in crop quality.

Drought-adapted varieties often employ an avoidance strategy, completing their main developmental stages before the onset of peak drought periods. When cultivating less tolerant varieties, adhering to irrigation regimes is critical, as water stress during the reproductive phase of the bean leads to significant losses in marketable grain yield.

General information about the subject — on the page Drought tolerance.

Sources8

Varieties of Common bean mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.