Jasmonate application influences endogenous abscisic acid, jasmonic acid and aroma volatiles in grapes infected by a pathogen (Glomerella cingulata)

<i>n</i>-Propyl dihydrojasmonates influence ethylene signal transduction in infected apple fruit by <i>Botrytis cinerea</i>

“…Similar results have been reported; PDJ application decreased the lesion diameter of C. gloeosporioides in apricots and G. cingulate in 'Kyoho' grape berries (Nimitkeatkai et al, 2011;Wang et al, 2015b). Other research showed that preharvest methyl jasmonate application reduced growth infection of B. cinerea in Chilean strawberries [F. chiloensis (L.) Mill.]…”

“…ABA treatment increased the pathogen resistance of fruit (Sivakumaran et al, 2016;Lievens et al, 2017). Wang et al (2015b) reported that PDJ application increased the endogenous ABA and JA concentrations in inoculated 'Kyoho' grape berries. In our study, the endogenous ABA concentration in the pathogen-infected fruit was increased at 8 DAT.…”

“…In the third group, the fruit were dipped into a 400 μM PDJ solution containing 0.1% surfactant approach BI for 5 min; these fruit are referred to hereafter as the PDJ-treated group. The concentration of PDJ was decided based on previous studies which showed the enlargement of an inoculated pathogen was suppressed in Japanese apricots and grapes (Nimitkeatkai et al, 2011;Wang et al, 2015b). After treatment, the fruit were air-dried.…”

“…Volatile compounds were measured according to Wang et al (2015b) with a slight modification. One gram (FW) of peel (three replications) with cyclohexanol as an internal standard was incubated at 40°C in a 5-mL vial with a cover lid.…”

“…(Kondo et al, 2005;Pongprasert et al, 2006), and ethylene production was increased in pears treated with PDJ . Nimitkeatkai et al (2011) and Wang et al (2015b) reported that PDJ treatment effectively inhibited growth of Collectrotrichum gloeosporioides in apricots (Prunus mume Sieb. et Zucc.)…”