Mechanisms of Chlorophyll Breakdown in the Drying of Green Prickleyashes (Zanthoxylum schinifolium Zucc.) with Damaged Oil Vacuoles

doi:10.7506/spkx1002-6630-201501004

Abstract

Abstract:

Fast drying could restrain chlorophyll (Chl) degradation in green prickleyashes (GPs) drying except for GPs
with damaged oil vacuoles (GP-DOV). To explore the possible mechanisms behind this phenomenon, the variations in Chl
pigments and related enzymes were investigated. Compared with GPs with intact oil vacuole, the variations in Chl pigments
in GP-DOV were more serious and complicated, that is, only 6% of the total Chl was retained in GP-DOV. This damage
seemed to inhibit the formation of pyrochlorophyll pigments after the formation of pheophorbide-a in the pheophorbide-a
oxygenase pathway and resulted in the accumulation of pheophorbide a, which accounted for 18% of the total Chl pigments
in dried GP. During the slow drying process, the damage gradually induced the activity of chlorophyll-degrading peroxidase, resulting in
the accumulation of C132 oxidized Chl pigments. The activities of related enzymes such as chlorophyllase and pheophorbidase showed a
downward trend whereas chlorophyll-degrading peroxidase and metal-chelating substances was fluctuated.

Key words: green prickleyash, drying, chlorophyll breakdown

CLC Number:

TS255.1

KAN Jianquan1,2, CHEN Kewei1, ZHANG Fusheng1,2, ZHENG Jiong1,2. Mechanisms of Chlorophyll Breakdown in the Drying of Green Prickleyashes (Zanthoxylum schinifolium Zucc.) with Damaged Oil Vacuoles[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201501004.

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Mechanisms of Chlorophyll Breakdown in the Drying of Green Prickleyashes (Zanthoxylum schinifolium Zucc.) with Damaged Oil Vacuoles

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