Institute of Postharvest Technology of Agricultural Products, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
Institute of Postharvest Technology of Agricultural Products, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
Food Chem. 2018 Nov 15;266:299-308. doi: 10.1016/j.foodchem.2018.06.010. Epub 2018 Jun 6.
This study aimed to investigate the effects of a novel chitosan formulation (Kadozan) treatment on disease development, response of disease resistance, metabolism of reactive oxygen species (ROS) in Peronophthora litchii-inoculated "Wuye" litchis. Compared with P. litchii-inoculated litchis, Kadozan-treated P. litchii-inoculated litchis exhibited lower fruit disease index, higher lignin content, higher activities of disease resistance-related enzymes (CHI, GLU and PAL), lower O generating rate and malondialdehyde content, higher activities of ROS scavenging enzymes (SOD, CAT and APX), higher contents of ascorbic acid and glutathione, and higher levels of reducing power and DPPH radical scavenging activity. These results suggest that Kadozan can be used to inhibit the growth of P. litchii in harvested litchis owning to the enhancement of disease resistance and ROS scavenging capacity, and decreases in O accumulation and membrane lipid peroxidation. Kadozan treatment can be used as a facile and novel method for suppressing postharvest pathogenic disease of litchis.
本研究旨在探讨一种新型壳聚糖制剂（Kadozan）处理对李痘病发展、抗病性反应以及活性氧（ROS）代谢的影响。与李痘病接种李果相比，Kadozan 处理的李痘病接种李果表现出较低的果实病害指数、较高的木质素含量、较高的抗病相关酶（CHI、GLU 和 PAL）活性、较低的 O 生成速率和丙二醛含量、较高的 ROS 清除酶（SOD、CAT 和 APX）活性、较高的抗坏血酸和谷胱甘肽含量，以及更高的还原力和 DPPH 自由基清除活性。这些结果表明，Kadozan 可以通过增强抗病性和 ROS 清除能力、减少 O 积累和膜脂质过氧化来抑制采后荔枝果实中李痘病的生长。Kadozan 处理可作为一种简便、新颖的方法来抑制荔枝采后病害。
