LED光照处理对乙烯褪绿蜜橘果实着色的影响

Effect of LED Light Treatment on Coloration of Ethephon-degreened Mandarin Fruit

用乙烯利对重庆本地产早熟蜜橘果实进行褪绿处理,对褪绿处理后的果实进行发光二极管(light emitting diode,LED)光照处理,探讨不同LED光源、光照时间和光照强度对乙烯褪绿蜜橘果皮和果肉着色的影响。结果表明,不同LED光源、光照时间和光照强度处理均有效地提高了果实色泽指数、色差参数(a*、b*、a*/b*和C*)和类胡萝卜素含量,降低了果皮H*值、叶绿素a与b的含量。其中,蓝光LED光源处理组的果实褪绿速率快,色泽指数高,果实着色更佳。300lx蓝光LED光照处理10h在改善乙烯褪绿蜜橘果实着色方面具有潜在的可行性。

The effect of light emitting diode（LED）light irradiation on the rind and pulp color of ethephon-degreened mandarin fruits was investigated in this study.The effects of LED light wavelength,treatment time and the intensity of the light on the coloration of mandarin fruit were all taken into consideration.LED light treatments can effectively improve the color index,the chromatographic parameters（a＊,b＊,a＊/b＊ and C＊）and the carotenoid content of ethephondegreened mandarin fruit,and reduced the H＊value,the chlorophyll a and chlorophyll b content.Blue LED light irradiated fruit had a better degreening rate and color index.Ethephon-degreened mandarin fruit could develop a better color after a blue LED light treatment at intensity of 300 lx for 10 h.