Guo Dongqi, Zhu Lixia, Hou Xujie
College of Life Science, Tarim Univ, and Xinjiang Production & Construction Group Key Laboratory of Agricultural Products Processing in Xinjiang South, 843300, Alar, Xinjiang, People's Republic of China.
J Food Sci. 2015 Jan;80(1):M137-41. doi: 10.1111/1750-3841.12724. Epub 2014 Dec 12.
The potential of using antagonistic yeast Metschnikowia pulcherrimas alone or in combination with ultraviolet-C (UV-C) treatment for controlling Alternaria rot of winter jujube, and its effects on postharvest quality of fruit was investigated. The results showed that spore germination of Alternaria alternata was significantly inhibited by each of the 3 doses (1, 5, and 10 kJ m(-2) ) in vitro. In vivo, UV-C treatment (5 kJ m(-2) ) or antagonist yeast was capable of reducing the percentage of infected wounds and lesion diameter in artificially inoculated jujube fruits, however, in fruit treated with combination of UV-C treatment and M. pulcherrima, the percentage of infected wounds and lesion diameter was only 16.0% and 0.60 cm, respectively. The decay incidence on winter jujube fruits treated with the combination of UV-C treatment and M. pulcherrima was 23% after storage at 0 ± 1 °C for 45 d followed by 22 °C for 7 d. None of the treatments impaired quality parameters of jujube fruit. Thus, the combination of UV-C radiation and M. pulcherrima could be an alternative to synthetic fungicides for controlling postharvest Alternaria rot of winter jujube.
研究了单独使用拮抗酵母美丽梅奇酵母或与紫外线-C（UV-C）处理相结合控制冬枣链格孢腐烂的潜力及其对果实采后品质的影响。结果表明，在体外，3种剂量（1、5和10 kJ m(-2)）中的每一种都能显著抑制链格孢的孢子萌发。在体内，UV-C处理（5 kJ m(-2)）或拮抗酵母能够降低人工接种枣果的感染伤口百分比和病斑直径，然而，在UV-C处理和美丽梅奇酵母联合处理的果实中，感染伤口百分比和病斑直径分别仅为16.0%和0.60 cm。在0±1℃下储存45天，然后在22℃下储存7天后，用UV-C处理和美丽梅奇酵母联合处理的冬枣果实腐烂发生率为23%。没有一种处理会损害枣果的品质参数。因此，UV-C辐射和美丽梅奇酵母的组合可能是控制冬枣采后链格孢腐烂的合成杀菌剂的替代品。
