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  • Title: Effect of methyl jasmonate on energy metabolism in peach fruit during chilling stress.
    Author: Jin P, Zhu H, Wang J, Chen J, Wang X, Zheng Y.
    Journal: J Sci Food Agric; 2013 Jun; 93(8):1827-32. PubMed ID: 23208649.
    Abstract:
    BACKGROUND: Energy status is associated with ripening, senescence and physiological disorder of various types of fruit after harvest, including peaches. Methyl jasmonate (MeJA) was effective in enhancing chilling tolerance in cold-stored peach fruit. The effect of MeJA on energy metabolism in peach fruit was investigated. RESULTS: MeJA treatment increased the contents of adenosine triphosphate and adenosine diphosphate, but decreased the content of adenosine monophosphate, which resulted in a higher level of energy charge in peach fruit. Enzyme activities including H+-adenosine triphosphatase, Ca2+-adenosine triphosphatase, succinic dehydrogenase and cytochrome c oxidase were also higher in MeJA-treated fruit than those in control fruit. Meanwhile, MeJA treatment markedly inhibited the increase of ion leakage and the accumulation of malondialdehyde, super-oxidant radical and hydrogen peroxide. CONCLUSION: These results indicated that MeJA could enhance chilling tolerance of peach fruit by inducing enzyme activities related to energy metabolism and maintaining high levels of ATP and energy charge.
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