ABA analogue spray to combat drought
Scientists at the US Van Andel Research Institute (VARI - Grand Rapids, Michigan) have identified several synthetic compounds that have the same effect as the plant growth regulator, abscisic acid (ABA). It causes plants to close their stomata in response to drought stress, thus reducing water loss through transpiration. The compounds are based on the synthetic seed germination inhibitor, pyrabactin. The discovery follows on from VARI work published in the US journal, Nature, last year. That established, at the molecular level, how ABA interacts with plant responses during drought.