Cell wall modification in 1-methylcyclopropene-treated post-climacteric fresh-cut and intact papaya fruit |
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| Authors: | Muharrem Ergun Yasar Karakurt Donald J Huber |
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| Institution: | (1) Department of Horticulture, Bingol University, Bingol, Turkey;(2) Agricultural Biotechnology Department, Suleyman Demirel University, Isparta, 32260, Turkey;(3) Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA |
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| Abstract: | Papaya is a climacteric fruit in which ripening is greatly regulated by ethylene often associated with stress responses such
as wounding. The changes in cell wall compositions in papaya fruit at an advanced stage of ripening under stress conditions
including chilling temperature of 5°C and wounding employed as fresh-cut and how these changes were affected by an ethylene
action inhibitor of 1-methylcyclopropopene (1-MCP) were examined in the study. The recovery of ethanol-insoluble solids, total
soluble sugars, water-soluble polyuronides, neutral hemicelluloses, and neutral sugars of rhamnose, arabinose, mannose and
glucose were not affected by 1-MCP or fresh-cut processing. The fresh-cut processing, however, caused a higher loss of total
polyuronides and the neutral sugar galactose while increasing the recovery of chelator-soluble polyuronides. Few significant
differences due to 1-MCP application were recorded in the recoveries of alkali-soluble polyuronides, hemicellulosic polyuronides
extracted with 4% KOH, and the neutral sugar xylose. Modifications of cell wall polyuronides and hemicelluloses in ripe fresh-cut
papaya fruit exhibited mostly similar patterns to those in intact ripe papaya fruit under the chilling temperature of 5°C
while minimally affected by 1-MCP. |
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