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

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.