【摘要】 以"早钟6号"枇杷为原料,采用50～60mg.L-1外源乙烯胁迫处理,研究不同贮藏时间内枇杷果实硬度及细胞壁物质的变化,并对果肉组织进行显微结构分析。结果表明,外源乙烯胁迫能抑制枇杷果实硬度增加、水溶性果胶减少、粗纤维生成的幅度,对总果胶影响不大。处理组贮藏20d和30d的果肉硬度比贮藏前增加了35.9%和57.8%,而对照组则分别增加了62.5%和90.0%,贮藏40d后两组趋于接近;贮藏40d时,处理组水溶性果胶含量为贮藏前的57.4%,而对照组为48.5%,对照组粗纤维含量比处理组高0.6g.kg-1;通过果肉细胞显微结构观察,获得了细胞显微水平上的理论支持。更多还原

【Abstract】 To study the changes on the hardness and cell wall substances of loquat fruit,50-60 mg·L-1 exogenous ethylene gas was applied to treat ’Zaozhong No.6′loquat fruit.The fruits were preserved at low temperature after treatment and the microstructure analysis of pulp tissue was conducted.The results showed that exogenous ethylene treatment repressed the fruits in developing of hardness,decreasing of water-soluble pectin and fibering synthesis,but not affected total pectin in the fruits.After 20 days and 30 days preservation,hardness of fruits in treatment group increased by 35.9% and 57.8%,respectively,in contrast,that of control group increased by 62.5% and 90.0% respectively.40 days later,fruit hardness of two groups tended to be similar to each other.On the 40th day,the water-soluble pectin of fruits in treated group was 57.4% of that before the preservation,and in control group,it was 48.5% of that without preservation.The crude fiber content of fruits was 0.6 g·kg-1 more in control group than in treatment group.The observations of microscope on pulp cell microstructure agreed with the results.更多还原