Physiological and Biochemical Responses of Gynura bicolor D.C to Phytic Acid during Storage

doi:10.7506/spkx1002-6630-201402062

Abstract

Abstract:

The effect of pretreatment with phytic acid (PA) on physiological and biochemical changes of Gynura bicolor
D.C during storage was investigated. Gynura bicolor D.C leaves were treated with 0.1, 0.5 and 1 mmol/L PA, respectively
and control samples were those treated with water. Both experimental and control samples were wrapped in 15 μm thick
high-density polypropylene (HDPE) bags and stored at 0 ℃ for 15 days. Physiological and biochemical indices, including
decay index, respiration rate, relative leakage, the activities of polyphenol oxidase (PPO), peroxidase (POD), catalase (CAT)
and superoxide dismutase (SOD), and the contents of malondialdehyde (MDA) and superoxide anion free radicals (O2 － ·),
were tested every 5 days. All PA treatments inhibited obvious physiological and biological reactions in Gynura bicolor D.C
leaves. Particularly, 0.5 mmol/L PA delayed the senescence of Gynura bicolor D.C leaves effectively by decreasing the
incidence of decay, maintaining low relative leakage, retarding the accumulation of O2 － · and MDA, inhibiting respiration
rate and PPO activity, and enhancing the activities of POD and SOD. Therefore, PA treatment is potentially applicable in
extending the storage life of Gynura bicolor D.C.

Key words: Gynura bicolor D.C, phytic acid, storage

CLC Number:

TS255.3

JIANG Li, JIANG Juan, ZHANG Li, FU Lin-ran, YU Zhi-fang*. Physiological and Biochemical Responses of Gynura bicolor D.C to Phytic Acid during Storage[J]. FOOD SCIENCE, 2014, 35(2): 316-321.

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