Auxin regulation on crop: from mechanisms to opportunities in soybean breeding

Abstract

Abstract Breeding crop varieties with high-yield and ideal plant architecture is a desirable goal of agricultural science. The success of ‘Green Revolution’ in cereal crops provides opportunities to incorporate phytohormones in crop breeding. Auxin is a critical phytohormone to determinate nearly all the aspects of plant development. Despite the current knowledge regarding auxin biosynthesis, auxin transport and auxin signaling has been well characterized in model Arabidopsis plants, how auxin regulates crop architecture is far from being understood and the introduction of auxin biology in crop breeding stays in the theoretical stage. Here, we give an overview on molecular mechanisms of auxin biology in Arabidopsis, and mainly summarize auxin contributions for crop plant development. Furthermore, we propose potential opportunities to integrate auxin biology in soybean breeding.