Postharvest ASM dipping and DPI pre-treatment regulated reactive oxygen species metabolism in muskmelon (Cucumis melo L.) fruit

Reactive oxygen species metabolism and phenylpropanoid pathway involved in disease resistance against Penicillium expansum in apple fruit induced by ϵ‐poly‐l‐lysine

“…ROS was important against pathogen invasion in fruit as a result of directly killing the pathogen or slowing down its ingress, and also served as a signal to trigger defense responses . Studies have been shown that an increasing H 2 O 2 content enhances disease resistance in apple, peach, strawberry, pear and muskmelon fruits . The results obtained in the present study show that the production of H 2 O 2 in apple fruits was significantly induced by PL treatment.…”

“…Although H 2 O 2 production contributed to enhanced disease resistance in fruit, the excess generation of H 2 O 2 has been related to lipid peroxidation in plant tissue . Excess H 2 O 2 could be eliminated by some antioxidant enzymes, including CAT, APX and GR, as well as antioxidants, such as ascorbic acid (AsA) and reduced glutathione (GSH) . The present study showed that PL dipping treatment significantly increased CAT, APX and GR activities in apple fruits.…”

“…Penicillium expansum was originally isolated from decaying apple fruit and then cultured on potato dextrose agar and incubated at 24 °C. A spore suspension of P. expansum was prepared as described by Ge et al . The spore suspension was diluted to 1 × 10 5 spore mL −1 using a hemocytometer.…”

Postharvest acibenzolar‐S‐methyl treatment maintains storage quality and retards softening of apple fruit

“…Studies have demonstrated that preharvest or postharvest ASM treatment could enhance disease resistance in apples (Ge, Wei, et al, ; Wei et al, ), pears (Ge et al, ), oranges (Moscoso‐Ramírez & Palou, ), bananas (Tang, Zhu, Li, Liu, & Irving, ), peaches (Liu, Jiang, Bi, & Luo, ), muskmelons (Ge et al, ; Ren et al, ), and mangos (Zhu, Cao, Wang, & Jiang, ), and reduce the incidence of diseases and therefore maintain quality. It has been demonstrated that ASM could regulate reactive oxygen species metabolism (Ge et al, ; Ren et al, ; Wei et al, ), phenylpropanoid pathway (Cao, Hu, Zheng, & Lu, ; Zhu et al, ), pentose phosphate pathway (Wei et al, ), while sucrose and energy metabolism (Ge et al, , , Ge, Chen, et al, ) were also induced by ASM. It has been shown that ASM could effectively maintain fruit quality of muskmelon by delaying the increase of soluble pectin content and weight loss, retarding the decrease of flesh firmness (Ren et al, ).…”

Changes in the sucrose metabolism in apple fruit following postharvest acibenzolar‐S‐methyl treatment

“…Acibenzolar‐S‐methyl (ASM) induced disease resistance in many fruit and vegetables, including apple, pear, muskmelon, and strawberry, treated either before or after harvest. Our previous study has proved that postharvest ASM treatment decreased lesion development of P. expansum in apple fruit .…”