Key Enzyme for ABA Synthesis: A Comprehensive Guide

The key enzyme involved in ABA synthesis is "9-cis-epoxycarotenoid dioxygenase (NCED)", which catalyzes the rate-limiting step in ABA biosynthesis. NCED is responsible for the conversion of 9-cis-epoxycarotenoids to xanthoxin, a precursor to ABA. The activity of NCED is regulated by various factors, including environmental stresses such as drought, salinity, and cold. It plays a crucial role in the plant's ability to adapt to these stressors. ABA regulates various processes in plant development, including seed dormancy, germination, and stomatal closure. Understanding the mechanism of ABA synthesis and the role of NCED is essential for improving plant resilience and productivity.