Integrated physiological and transcriptomic analyses reveal that cell wall biosynthesis and expansion play an important role in the regulation of plant height in alfalfa.

Background: Alfalfa (Medicago sativa L.) is a high-quality, high-protein forage, and the improvement and breeding of key traits are important for enhancing the productivity of alfalfa. Plant height is an important trait that affects crop yield, and its regulatory network mechanism has been widely reported in model plants, however, there are fewer studies on the developmental regulatory of plant height in alfalfa.