Jasmonic acid,polyamine, and antioxidant levels in apple seedlings as affected by Ultraviolet-C irradiation |
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| Authors: | S Kondo A Fiebig K Okawa H Ohara L Kowitcharoen H Nimitkeatkai M Kittikorn M Kim |
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| Institution: | (1) Graduate School of Horticulture, Chiba University, Matsudo, Chiba 271-8510, Japan;(2) Department of Horticulture, Taegu University, Gyeongsan, 712-714, Korea |
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| Abstract: | The effect of UV-C irradiation on jasmonates, abscisic acid (ABA), polyamines and antioxidant activities was investigated
in apple plants (Malus domestica Borkh.). The EC50 values of O2
–-scavenging activity in the UV-C treated leaves were lower than those in the untreated control. In addition, total ascorbic
acid and polyphenolic concentrations in the UV-C treated leaves were generally higher than those in the untreated control.
Although the endogenous ABA concentrations were not significantly different between the untreated control and UV-C treatment,
the endogenous jasmonic acid, putrescine, and spermine concentrations in the UV-C treated plants were higher than those in
the untreated control. However, the application of PDJ before UV treatment inhibited the rise of endogenous jasmonate and
putrescine concentrations. The increase of ascorbic acid was also inhibited by PDJ application before UV treatment. These
facts suggest that the increase of jasmonates and polyamines may be associated with UV-C stimulation, and UV-C irradiation
may be effective for increasing antioxidant activity in apple leaves. |
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