副干酪乳杆菌FX-6产抗菌肽粗提物对荔枝贮藏品质的影响

摘要

通过离体实验研究了副干酪乳杆菌FX-6产抗菌肽粗提物对荔枝霜疫霉菌生长的抑制作用,并且以施保克咪鲜胺处理作为对照,研究了两种质量浓度的抗菌肽粗提物在25 ℃条件下对荔枝贮藏品质的影响.结果表明,抗菌肽粗提物能显著抑制荔枝霜疫霉菌的生长,改善荔枝的贮藏品质,抑制霉变及褐变,维持果肉的营养成分含量;0.5 mg/mL的抗菌肽粗提物效果优于相同质量浓度的施保克咪鲜胺,且1.0 mg/mL抗菌肽粗提物的效果更佳.可见,副干酪乳杆菌FX-6产抗菌肽粗提物能有效延长荔枝的常温贮藏期,具有潜在的应用价值.%The inhibitory effect of crude extract containing antimicrobial peptide from Lactobacillus paracasei subsp. tolerans FX-6 on the growth of Phytophthora litchi was investigated in vitro,and the effect of two different concentrations of the extract on the quality of litchi during storage at 25 ℃ was also evaluated using prochloraz as a control. The results showed that the antimicrobial peptide could significantly inhibit the growth of Phytophora litchi,improve the storage quality of litchi fruits, inhibit mildewing and browning, and preserve the nutritional quality of litchi pulp. The antimicrobial peptide at 0.5 mg/mL had better effect than prochloraz at the same concentration but was less effective than at 1.0 mg/mL. It is clear that the antimicrobial peptide could prolong the storage period of litchi at normal temperature, thus having potential application value.