What regulatory effects does paclobutrazol have on rapeseed growth?

(Agricultural Wealth Network) First, the physiological effect. The photosynthetic rate of treated leaves, petioles and compressed stem sections increased by 30.8%. The gibberellin content in the plant body decreased, while the abscisic acid content increased, indicating that plant growth was inhibited. Second, the biological effect. Rapeseed treated with paclobutrazol has short stems and strong roots, with a stem-length control rate of 362% in the compressed stem section, and the rhizome diameter and root dry weight increased by 15% and 36% respectively; the leaf tissue structure is compact and drought tolerance is strong. Rapeseed seedlings raised with paclobutrazol for transplanting survive and turn green quickly, and grow early and vigorously. Third, the yield effect. Treating rapeseed with paclobutrazol increases yield by 10% to 20%, and in years with especially severe frost damage it can increase yield by more than 30%.