A rapid wound healing in vegetables and fruit is instrumental in maintaining fruit quality and extension of shelf life. In this study, wounded kiwifruit were separately treated with methyl jasmonate (MeJA) and diethyldithiocarbamic acid (DIECA, an inhibitor of jasmonate biosynthesis) to evaluate the effect of MeJA on wound healing of kiwifruit. The results showed that MeJA treatment leads to increases of endogenous JA biosynthesis, lipoxygenase (LOX) and 12-oxo-phytodienoic acid reductase (OPR) activities, and JA synthesis genes expression, while DIECA represses these processes. Meanwhile, MeJA promoted the autofluorescence of suberin polyphenolic (SPP) and the accumulation of SPP monomers. MeJA-treated group demonstrated significantly enhanced total phenols, flavonoids, and lignin contents. Besides, MeJA promoted the activities of phenylalanine ammonia-lyase (PAL), cinnamic acid-4-hydroxylase (C4H), 4-COumaric-COA ligase (4CL), peroxidase (POD), polyphenol oxidase (PPO), and the respective gene expression levels. Results suggest that wound healing in kiwifruit could be promoted by MeJA via activation of phenylpropanoid metabolism.

蔬菜和水果的快速伤口愈合有助于维持水果质量和延长保质期。在这项研究中，用茉莉酸甲酯（MeJA）和二乙基二硫代氨基甲酸（DIECA，茉莉酸酯生物合成的抑制剂）分别处理受伤的奇异果，以评估MeJA对奇异果伤口愈合的影响。结果表明，MeJA处理导致内源性JA生物合成，脂氧合酶（LOX）和12-氧代植物二烯酸还原酶（OPR）活性以及JA合成基因表达增加，而DIECA抑制这些过程。同时，MeJA促进了Suberin多酚（SPP）的自发荧光和SPP单体的积累。MeJA治疗组显示总酚，类黄酮和木质素含量显着提高。除了，MeJA促进了苯丙氨酸解氨酶（PAL），肉桂酸-4-羟化酶（C4H），4-香豆酸-COA连接酶（4CL），过氧化物酶（POD），多酚氧化酶（PPO）的活性以及相应的基因表达水平。结果表明，MeJA可以通过激活苯丙烷代谢来促进猕猴桃的伤口愈合。