Effect of Preheating Acclimation on the Adaptation of Apple Fruit Peel to Sudden Excessive Sunlight

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (6): 1347-1352.

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Effect of Preheating Acclimation on the Adaptation of Apple Fruit Peel to Sudden Excessive Sunlight

HAO Yan-yan^1,2, Li Wen-lai²,and HUANG Wei-dong^1*

(¹College of Food Science and Nutritional Engineering, China Agricultural University,Beijing 100083; ²College of Horticulture, Shanxi Agricultural University, Taigu, Shanxi 030801)

Received:2007-03-09 Revised:2007-09-10 Online:2007-12-25 Published:2007-12-25

Abstract

Abstract: The responses of fruit peel to natural strong sunlight after heat acclimation were studied with bag-removed apples. The results indicated that, the activities of peroxidase (POD) and polyphenol oxidase (PPO) in apple peel increased as a consequence of heat acclimation, and the contents of epicatechin, chlorogenic acid and salicylic acid (SA)increased. Meanwhile, the total antioxidant activities(TAA) of extraction from apple peel increased. Fruits exposed to natural strong sunlight after heat acclimation maintained higher antioxidant ability in fruit peel sometime during explosion, which suggested that preheating acclimation may render a higher ability of scavenging oxygenic free radicals to delay the appearance of fruit sunburn.

Key words: Apple, Sunburn, Heat acclimation, Excessive sunlight, Phenolics, Antioxidation

CLC Number:

S661.1

HAO Yan-yan;Li Wen-lai;and HUANG Wei-dong. Effect of Preheating Acclimation on the Adaptation of Apple Fruit Peel to Sudden Excessive Sunlight[J]. ACTA HORTICULTURAE SINICA, 2007, 34(6): 1347-1352.

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Effect of Preheating Acclimation on the Adaptation of Apple Fruit Peel to Sudden Excessive Sunlight

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