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| 2，6-Dichloroisonicotianic acid repressed reactive oxygen species content and fruit ripening to induce diseasetolerance in banana（ Musa AAA. cv. Dongguang） |
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| DOI：10.16768/j.issn.1004-874X.2016.11.017 |
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| Abstract: |
| The possible mechanism of INA on disease-tolerance in postharvested banana （Musa AAA. cv.
Dongguang） was investgated. Ther results showed that INA treatment effectively reduced the disease spot sizes on the
peel of banana fruit when inoculated with spore suspension of Collectotrichum musae after INA treatment and cultured
for 15 d. During storage，MDA content increased in both INA treatment and control；however，INA treatment
markedly inhibited the MDA content，suggesting that INA retarded the fruit ripening. The content of H2O2 in INA
treatment was obviously lower than that in control from the 8th d，while high activety of NADPH oxidase in INA
treatment was found from the 10th d. An induced CAT activity was found in control during storage；however，high
APX activity was detected in INA treatment. During the later storage，INA induced the APX gene expression，but
repressed the expression of CAT and P450. The results suggested that enhancing APX activity/gene expression could
reduce H2O2 level to improve banana disease tolerance during storage. |
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