Effect of hot water on red ginger (Alpinia purpurata) inflorescence vase life
Theeranuch Chantrachit and Robert E. Paull
Postharvest Biology and Technology. Volume 14, Issue 1, September 1998. Pages 77-86.
1998
บทคัดย่อ
Different ranges of temperatures and exposure times were studied to
determine suitable hot water treatments to extend red ginger vase life. Hot
water at 50°C for 12¯15 min showed a high
potential to prolong vase life. The threshold for damage on the flower bracts
was represented by the equation temperature=55.23-4.5 log(exposure time, min), R2=0.97
(P=0.0001), with 
5%
of total bracts damage. Damage caused by hot water treatments correlated with
the amount of rainfall 7 days before harvest (P=0.004), whereas vase
life of hot water-treated flowers showed a negative correlation with the amount
of rainfall 1 month before harvest (P=0.04). Preconditioning flowers at
40°C
for 15 min before hot water (50°C, 12 min) significantly
reduced damage from the hot water treatment. Preconditioned flowers lost their
tolerance to the hot water treatment if the intervening period between preconditioning
and hot water treatment, was longer than 6 h. The suggested treatment to extend
vase life was a preconditioning at 40°C for 15 min, standing in the
bucket of water at room temperature (22±2°C) for 1 h,
and then a hot water treating at 50°C for 12¯15
min.