Pre-harvest calcium sulfate application improves postharvest quality of cut rose flowers
The quality of cut rose flowers at the postharvest stage is affected by pre-harvest conditions. The present study was conducted to examine the possible involvement of calcium sulfate (CaSO4) in regulation of rose flower senescence. Roses (Rosa hybrida L.) cultivars ‘Cool Water’ and ‘Pretty Blinda’, were treated with either water or CaSO4 at 200 mg L-1 containing 0.01% Tween 20, three times (1, 3 and 5 days) pre-harvest. CaSO4 treatment promoted bud opening and delayed senescence. The treated flowers stayed turgid and continued their initial postharvest growth for longer periods of time. CaSO4 spray increased calcium (Ca) content of stems, leaves and petals of flowers and suppressed ethylene production and ion leakage with age.
Key words: CaSO4, ethylene, ion leakage, longevity, Rosa hybrida