Cold-induced endogenous nitric oxide generation plays a role in chilling tolerance of loquat fruit during postharvest storage
Maojun Xu, Jufang Dong, Ming Zhang, Xiangbin Xuand Lina Sun
Postharvest Biology and Technology, Volume 65, March 2012, Pages 5–12
2012
บทคัดย่อ
The effects of low temperature on endogenous nitric oxide (NO) generation and the role of endogenous NO in chilling tolerance of loquat fruit during cold storage were investigated. Low temperature at 1 °C triggered a marked increase in endogenous NO levels in loquat fruit during postharvest storage. Pretreatment of fruit with the NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO) not only abolished endogenous NO accumulation but also aggravated chilling injury symptoms in the fruit stored at 1 °C and 95% RH. Moreover, the cold-stored fruit in which NO accumulation is abolished by cPTIO exhibited significantly higher membrane permeability, lipid peroxidation, superoxide anion (O2