Role of Hydrogen Peroxide on Chilling Resistance of Postharvest Banana Fruits

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (6): 1373-1378.

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Role of Hydrogen Peroxide on Chilling Resistance of Postharvest Banana Fruits

PANG Xue-qun^1,2, PAN Shao-li¹, WANG Hai-bo¹, HUANG Chun-ying¹, ZHANG Zhao-qi^1*

(¹College of Horticulture , South China Agricultural University, Guangzhou 510642, China; ²College of Biotechnology ,South China Agricultural University, Guangzhou 510642, China)

Received:2007-05-17 Revised:2007-09-12 Online:2007-12-25 Published:2007-12-25

Abstract

Abstract: Exogenous hydrogen peroxide, and salicylic acid and methyl jasmonate，which induced the accumulation of endogenous hydrogen peroxide in plants, were used to investigate the role of hydrogen peroxide on induction of chilling resistance of postharvest banana fruits. The results indicated that 20 mmol·L^-1 hydrogen peroxide, 0.7 mmol·L^-1 salicylic acid and 0.1 mmol·L^-1 methyl jasmonate treatments delayed the occurrence of chilling injury symptom of banana fruits by 2-5 d at 7℃. The treatments also delayed the increase of membrane permeability and MDA contents, induced the activities of SOD and POD, inhibited the activities of CAT, and therefore resulted in accumulation of endogenous hydrogen peroxide in pericarp of banana fruits. The results implied that salicylic acid and methyl jasmonate might induce the accumulation of endogenous hydrogen peroxide by inhibition of CAT activity, and hydrogen peroxide might involve in induction of the chilling resistance of postharvest banana fruits by acting as the signal molecule.

Key words: Banana, Hydrogen peroxide, Salicylic acid, Methyl jasmonate, Chilling, Cold resistance

CLC Number:

S 668.1

PANG Xue-qun;PAN Shao-li;WANG Hai-bo;HUANG Chun-ying;ZHANG Zhao-qi. Role of Hydrogen Peroxide on Chilling Resistance of Postharvest Banana Fruits[J]. ACTA HORTICULTURAE SINICA, 2007, 34(6): 1373-1378.

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Role of Hydrogen Peroxide on Chilling Resistance of Postharvest Banana Fruits

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