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Effect of Different Concentrations of CPPU on Nutritional Quality and Residue of Postharvest Strawberry Fruits(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年03
Page:
141-145
Research Field:
Publishing date:

Info

Title:
Effect of Different Concentrations of CPPU on Nutritional Quality and Residue of Postharvest Strawberry Fruits
Author(s):
GUO Linlin; ZHANG Guilan; HUANG Yunan; XIE Hanzhong
Effect of Different Concentrations of CPPU on Nutritional Quality and Residue of Postharvest Strawberry Fruits
Keywords:
strawberry; CPPU; quality; security; tannin; hydrolytic amino acid
PACS:
-
DOI:
10.11937/bfyy.201703032
Abstract:
‘Sweet Charlie’ strawberry was used as test material，different concentrations (0.0，2.5，5.0，10.0，20.0 mg?L-1） of CPPU （N-（2-choro-4-pyridyl) - N′-Phenylurea) were sprayed after flowering.The effects of nutritional quality and security of ripe were investigated by analyzing the contents of CPPU levels and strawberry single fruit weight，sugar，acid，vitamin C，free amino acid and tannin etc.The results showed that strawberry single fruit weight and SSC/TA were higher than control and reached their summit at 5.0 mg?L-1.Titrable acidity (TA) content was lower than control with significant difference (P＜0.05) and reached minimum at 5.0 mg?L-1.Low concentration of CPPU treatment (5.0 mg?L-1 and 2.5 mg?L-1) would increase the contents of total soluble sugar（TSS），fructose，glucose and vitamin C contents.However，high concentration decreased that.The content of tannin achieved the lowest at 5.0 mg?L-1，and change tendency of vitamin C content was the opposite.The contents of total hydrolytic amino acid decreased with CPPU treatments，and essential amino acid increased slightly.These results indicated that the taste of strawberry fruit and some nutritional quality were risen by the treatment of low concentration of CPPU (no more than 5.0 mg?L-1).In contrast，the quality of flavor and nutritional became poorer by high concentration.Only 20.0 mg?L-1 CPPU treated strawberry CPPU detection，and the content was below maximum residue limits 0.03 mg?kg-1（U.S EPA).It showed strawberry was more security when the concentration of CPPU application of less than 20.0 mg?L-1.

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Last Update: 2017-03-22