Effects of compound with 6-BA,GA_3 and fruit wax coating on the water loss and skin color of betel nuts and its mechanism
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摘要: 以海南产新鲜槟榔为研究对象,研究了100 mg/L 6-BA+100 mg/L GA3+50%果蜡复合涂膜对采后槟榔鲜果在（25±0.5）℃和（7±0.5）℃条件下失水和色泽变化的影响及其机理。贮藏至21 d,低温结合涂膜处理的槟榔失重率为2.51%、电导率为15.09%、丙二醛为13.1%,含量均显著低于其他处理组（p<0.05）;贮藏至21 d,通过电镜观察,低温结合涂膜处理的槟榔组织结构保持平滑状态、没有破损,明显优于其他处理组,而且该组的槟榔果实表皮叶绿素含量最高、胡萝卜素含量最低、叶绿素酶活性最低。结果表明复配涂膜配合低温贮藏能有效抑制丙二醛的生成,维持细胞膜的完整性,降低了叶绿素酶对叶绿素的催化分解以及减缓了胡萝卜素的生成,相比常温贮藏和未涂膜处理可以更有效地降低槟榔果实失水,增加槟榔表皮叶绿素的积累,延缓槟榔果实黄化劣变。Abstract: Fresh betel nut of native species in Hainan was used as the research object,by measuring the water loss rate,chlorophyll and carotenoid,tissue structure and other qualities,to study the effects of choose compound with coating combination of 100 mg / L GA3+ 100 mg / L 6-BA + 50% fruit wax on water loss and etiolation at( 25 ± 0.5) ℃ and( 7 ± 0.5) ℃. Storaged to the 21 st days,the weight loss rate( 2.51%),the conductivity( 15.09%),the MDA content( 13.1%) of betel nuts treated with low temperature and coating was significantly lower than other treatment groups( p < 0.05). At the end of storage,the microstructure of betel nuts treated with low temperature and coating was undamaged and maintained a smooth state,which significantly better than that of other treatment groups by electron microscope observation,and it had the highest content of chlorophyll,the lowest content of carotene,and the lowest level of chlorophyll enzyme activity in all groups.The results showed that the composite coating with low temperature storage could effectively inhibit the formation of MDA,keep cell membrane intact reduced the chlorophyll enzyme catalytic decomposition of chlorophyll,slow down the formation of chlorophyll and carotenoid,compared to storage at room temperature and without coating could effectively reduce betel nut fruit water loss,increase the accumulation of chlorophyll of areca and epidermal,delaying the betel nut fruit chlorosis deterioration.
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Keywords:
- betel nuts /
- coating /
- water loss /
- etiolation
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