Plants, Volume 10, Issue 3 (March 2021) – 189 articles
Cover Story (view full-size image): Common bean (Phaseolus vulgaris L.), an important source of dietary protein worldwide, is grown largely on small-holder farms in rural sub-Saharan Africa and Latin and South America, systems that are highly susceptible to drought. While drought reduces photosynthesis, source strength is not a reliable indicator of bean yield. Instead, partitioning efficiency from pod to seed correlates positively with bean yield in drought. This is because domesticated bean retains an ancestral trait favoring vegetative growth and abortion of reproductive structures under drought. Drought tolerant lines overcome this trait and maintain reproductive structures and yield. Transport processes at the interface between pod and seed are likely targets for stress-induced signals including the hormone, abscisic acid. Resistance to internal signaling may underlie drought-tolerance in common bean. View this paper
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