| 摘要: |
| 【目的】探讨丙烯和1-甲基环丙烯（1-methylcyclopropene，1-MCP）对不同耐贮性柿果实采后生理变化的影响，为不同品种柿果实的采后贮藏保鲜提供参考。【方法】 以耐贮性差的‘富平尖柿’和耐贮性强的‘干帽盔’为试材，于八成熟时期采收果实后分别经丙烯和1 MCP处理，以不处理的果实为对照，每3 d测定1次果实硬度、呼吸速率、乙烯释放速率、ACC合成酶（ACS）和ACC氧化酶（ACO）活性的变化。【结果】2个品种柿果实在贮藏期间硬度不断下降，硬度降至2 kg/cm2的时间以‘富平尖柿’早于‘干帽盔’，‘富平尖柿’的呼吸高峰和乙烯释放高峰较‘干帽盔’出现早且峰值更高；2种试材ACS、ACO活性均呈现先上升后下降的趋势，但‘富平尖柿’的2种酶活性高峰均显著高于‘干帽盔’。1-MCP能显著减缓果实硬度的下降（但品种间差异不大），可显著降低呼吸强度和乙烯释放速率，抑制ACS、ACO的活性。丙烯可显著加速果实的软化，对呼吸速率、乙烯释放速率和2种酶活性的促进作用在‘富平尖柿’上表现得更为明显。【结论】‘富平尖柿’对乙烯类似物丙烯的响应较‘干帽盔’更为敏感。1-MCP处理柿果实软化的抑制效果在‘富平尖柿’上的表现优于‘干帽盔’。 |
| 关键词: 丙烯 1-甲基环丙烯 耐贮性 柿 采后生理 |
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| 基金项目:国家自然科学基金项目（30771756）；农业部西北地区园艺作物生物学与种质创制重点实验室项目 |
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| Effects of propylene and 1-MCP on postharvest physiological changes of persimmon fruits with different storability |
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SUN Zhen-ying,MA Qiu-shi,LI Xiu-fang,et al
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| Abstract: |
| 【Objective】This study aimed to investigate the effects of propylene and 1-methylcyclopropene (1 MCP) on postharvest physiological changes of persimmon fruits with different storability so as to improve the storage quality of fruits of different persimmon varieties.【Method】‘Fuping Jianshi’ with poor storability and ‘Ganmaokui’ with good storability were selected in this study.The fruits were harvested when they were medium well (MW) and treated with propylene and 1-MCP.The fruits without treatment were taken as control.The firmness,respiration rate,ethylene release rate,and activities of ACS and ACO were measured every 3 days for analysis.【Result】The firmness of both varieties declined continuously during the storage and ‘Fuping Jianshi’ dropped to 2 kg/cm2 earlier than ‘Ganmaokui’.The peak of respiration and ethylene of ‘Fuping Jianshi’ was earlier and higher than ‘Ganmaokui’.Activities of ACS and ACO of both varieties increaseded firstly and then descended,and ‘Fuping Jianshi’ had significantly higher values than ‘Ganmaokui’.1-MCP significantly delayed the softening of persimmon fruits without large differences between varieties.1-MCP also reduced the respiration rate and ethylene release rate significantly and decreased the activities of ACS and ACO.Propylene promoted the softening of persimmon fruits,increased the respiration rate and the ethylene release,and promoted the activities of ACS and ACO.The influences of propylene on ‘Fuping Jianshi’ were more significant. 【Conclusion】‘Fuping Jianshi’ was more sensitive to propylene and 1-MCP was more effective on ‘Fuping Jianshi’. |
| Key words: propylene 1-MCP storability persimmon postharvest physiology |
