Effects of Red Light-Emitting Diode (LED) on the Postharvest Yellowing Change of Broccoli
ZHANG Na1, YAN Rui-xiang1*, GUAN Wen-qiang2, WANG Chao3
1. National Engineering and Technology Research Center for Preservation of Agricultural Products, Tianjin Key Laboratory of Postharvest Physiology and Storage of Agricultural Products, Tianjin 300384, China 2. College of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China 3. Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin 300134, China
Abstract：As an important factor affecting the growth and development of plants, light gives wide range regulating effects on physiological metabolisms, photosynthesis characteristic, quality and aging of plants during the growth . However, the research whether light can improve the quality of fruits and vegetables and prolong the storage period of is rarely reported home and abroad. Three monochromatic light , red, blue and green were used to the irradiation of broccoli. It was found that the inhibitory effect of red light could inhibit yellowing of postharvest broccoli better than that of blue light while green light could accelerate the yellowing, therefore this paper focused on the yellowing inhibitory effect of LED monochromatic red light on postharvest broccoli. The LED monochromatic red light with wavelength (625±5)nm, light intensity (100±5)Lx was used to provide continuous irradiation to broccoli with no light treatment as control. The results showed that: LED monochromatic light could inhibit the increase of chromatic aberration L value. The chromatic aberration -a/b value was maintained and the chlorophyll degradation was delayed. Meanwhile, the broccoli commodity was effectively maintained because of the delay of the respiration peak and the reduction of respiratory intensity as well as ethylene release rate . Correlation analysis showed that, after red LED monochromatic light treatment of broccoli, a positive very significant correlation (p<0.01) was found between the ethylene release rate and yellowing index. Compared with conventional no-light, treatments of LED monochrome red could extend the storage period around 5d for broccoli, and the results can provide a theoretical basis for cold storage of Broccoli.
Key words：Red LED monochromatic light;Yellowing index;Irradiation;Chromatic aberration;Broccoli
张 娜1，阎瑞香1*，关文强2，王 超3 . LED单色红光对西兰花采后黄化抑制效果的影响 [J]. 光谱学与光谱分析, 2016, 36(04): 955-959.
ZHANG Na1, YAN Rui-xiang1*, GUAN Wen-qiang2, WANG Chao3 . Effects of Red Light-Emitting Diode (LED) on the Postharvest Yellowing Change of Broccoli . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(04): 955-959.
[1] REN Ke, TU Kang, PAN Lei-qing, et al(任 珂, 屠 康, 潘磊庆，等). Transactions of the Chinese Society of Agricultural Engineering(农业工程学报), 2005, 21(8): 146. [2] Funamoto Y, Yamuchi N, Shigenaga T, et al. Postharvest Biol. Technol., 2002, 24: 163. [3] ZHANG Na, NONG Shao-zhuang, LI Chun-yuan, et al(张 娜, 农绍庄, 李春媛, 等). Storage and Process(保鲜与加工), 2013, 13(2): 9. [4] TAO Wei-yu, HAN Jun-hua, NIU Tian-gui, et al(陶炜煜, 韩俊华, 牛天贵, 等). Food Science and Technology(食品科技), 2006, 31(4): 43. [5] Büchert Agustin M, Gómez Lobato Maria E, Villarreal Natalia M, et al. Journal of the Science of Food and Agriculture, 2011, 91(2): 355. [6] ZHAN Li-juan, WEI Guo-qiang, QIAO Ming-wu, et al(詹丽娟, 魏国强, 乔明武, 等). Food Science and Technology(食品科学), 2012, 33(14): 296. [7] Olarte C, Susana Sanz, Echavarri J F，et al. LWT-Food Science and Technology, 2009, 42(1): 402. [8] Pen Litao, Jiang Yuming. LWT- Food Science and Technology, 2003, 36(3): 359. [9] SUN Xiang-dong, WANG Le-kai，REN Hong-bo, et al(孙向东, 王乐凯, 任红波, 等). Science and Technology of Cereals, Oils and Foods(粮油食品科技), 2002, 10(2): 31. [10] CHEN Xiao, QIAN Ping, HE Hong-yan, et al(陈 潇, 钱 平, 何红艳, 等). Science and Technology of Food Industry(食品工业科技), 2010, 31(6): 242. [11] Hyeon H K, Gregory D G, Raymond M W. Hort Science, 2004, 39(7): 1617. [12] WEI Guo-qiang, QIAO Ming-wu, WANG Hui-rong(魏国强, 乔明武, 王慧荣). Food Science(食品科学), 2012, 33(14): 296. [13] Alexander L, Grierson D. Journal of Experimental Botany, 2002, 53: 2039.
