Comparison of Shelf Life and Quality of Potted Hydrangea ‘Speedy Red’ under Different Abscisic Acid Spray Concentrations

This study compared the shelf life and quality of potted hydrangea (‘Speedy Red’) treated with different abscisic acid (ABA) spray concentrations investigated associated physiological changes. Plants were 0 (control), 1,000, 2,000, or 2,500 mg·L-1 ABA, which was applied by spraying. Treatment 2,000 ABA extended 2 days to control, treatment attenuated change in sepal color wilting other treatments, suggesting control plants. Additionally, increased stomatal closure up day 5 post-treatment, corresponding end for plants, indicating that decreased transpiration-induced water loss. The resulted highest maximum quantum yield PSII among normalized difference vegetation index simple ratio values also higher than those obtained treatments. Thus, mitigated stress inducing Red’). Overall, controlled effectively inhibited transpiration, minimized loss preserved plant moisture levels, thereby extending quality. Our assessed potential use nondestructive measurements (e.g., chlorophyll fluorescence indices) monitor hydrangea, may facilitate evaluation flower on site. at extends improves These results are useful postharvest management hydrangeas.