Studies On The Mechanism Of Softening Controlling And Applied Technology Of Mopan Persimmon

Experiment was conducted with fruit of Mopan persimmon. The effect of cold-storage,freezing point storage, ambient temperature storage,1-methylcyclopropene(1-MCP) andvacuum packaging on quality, respiration rate, ethylene production, cell membranepermeability, the relationship between softening enzyme and fruit firmness, so as to providetheoretical basis for mopan persimmon fruit storage and delay fruit softening.Results showed that, the Mopan persimmon at80percent maturity stage had higherfirmness, titratable acidity, reducing sugar VC, soluble tannin content, lower respiration rate,cell membrane permeability, alcohol content, and the activity of PE,PG, cellulose, amylasewas lower during freezing point storage, the Mopan persimmon at80percent maturity stagewere appropriate for long-termstorage.During freezing point storage, CO2accelerated the decline of fruit firmness, titratableacidity, VCand soluble tannin content, but1-MCP effectively inhibited this decline.1-MCPinhibited the increase of respiration rate, alcohol content, and cell membrane permeability.1-MCP delayed the appearance of PE activity peaks and effectively inhibited the activity ofPG.1-MCP effectively delayed the fruit senescent and softening process.Cold-storage and vacuum packaging accelerated the decline of titratable acidity, VCandsoluble tannin content, freezing point storage inhibited this decline and inhibited the increaseof respiration rate and cell membrane permeability. Freezing point storage delayed theincrease of cellulose and amylase activity. Freezing point storage effectively delayed the fruitsenescent and softening process, extended the storage time of Mopan persimmon,1-MCPcombined with vacuum packaging accelerated the deastringency of the Mopan persimmonand maintained the firmness of the Mopan persimmon.During ambient temperature storage, CO2and vacuum packaging accelerated the declineof titratable acidity, VCand soluble tannin content, but1-MCP effectively inhibited thisdecline, CO2damaged the membrane integrity,1-MCP and vacuum packaging could maintain membrane Integrity, delayed the decline of fruit firmness.1-MCP effectively inhibited PG andcellulose activity.1-MCP combined with vacuum packaging accelerated the deastringency ofthe Mopan persimmon and maintained the firmness of the Mopan persimmon.