Abstract
Cymbidium hybridum is a favourite flower of the annual flower. Its flower bud number, plant type and morphological characteristics affect its ornamental effect. This experiment explored the effects of 50mg/L, 100mg/L, 200mg/L, 300mg/L, 400mg/L paclobutrazol on the enzyme activity, flower bud number and plant height dwarfing of the antioxidant system of Cymbidium hybridum. The results showed that: 1. Each concentration treatment can promote flower bud differentiation, 300mg/L is the best. 2. Paclobutrazol has an inhibitory effect on plant height, and with the increase of concentration, the inhibition is more obvious, and the inhibition of 400mg/L is the strongest. 3. Paclobutrazol can increase the enzyme activity of the antioxidant system of Cymbidium hybridum. The activity of SOD and POD is promoted by low concentration and inhibited by high concentration. The contents of CAT and soluble protein in each concentration were higher than those in the control group.
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