模拟运输振动胁迫对宜宾茵红李生理生化变化的影响

Effect of simulating transportation vibration stress on changes of physiology and biochemistry of “Yinhong” plum

探讨振动胁迫对李子果实采后贮藏性的影响,为减轻李子果实振动损伤提供一定的理论依据。以宜宾茵红李为实验材料,模拟运输过程中机械伤害对茵红李采后果实生理和品质的影响。结果表明:随着振动胁迫时间的延长,受振动胁迫的茵红李果实与对照果实呼吸强度差异显著(p<0.05),呈现先上升后下降的趋势;与对照组比,可溶性固形物、可滴定酸显著的下降(p<0.05),维生素C含量下降但不显著(p>0.05);多酚氧化酶活性呈先急剧上升而后下降趋势,过氧化物酶活性变化虽有波动,但总体呈显著上升趋势,二者均与对照组有显著差异。茵红李是一种易受振动损伤的李子品种,运输振动胁迫能加速果实采后成熟及衰老。

The effect of vibration time on postharvest storage of plum fruit was discussesed, which provided some theoretical basis for the reduce of postharvest plum fruit vibration damage.The physiology and quality changes of ＂Yinhong＂ plum was studied with mechanical stress of simulated transport vibration.The result showed that respiratory rate of ＂Yinhong＂ plum under vibration stress was increased at the early storage time, and then decreased, and was significantly different from the control group with the extension of vibration time （p 〈 0.05 ） , while titratable acid and soluble solid content were significantly decreased compared with the control group.Vitamin C of ＂Yinhong＂ plum under vibration stress was decreased compared with control group （p 〉 0.05 ） , but there was statistically no significant difference.The activity of polyphenol oxidase was more significantly increased first and then decreased, the activity of peroxidase was increased very significant, and there was significant differences of the two enzyme activites between vibration stress group and control group.The ＂Yinhong＂ plum is an injuryprone plum cultivars.Transportation vibration stress can speed up the maturation and senescence of ＂Yinhong＂ plmn.