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园艺学报 ›› 2025, Vol. 52 ›› Issue (7): 1901-1914.doi: 10.16420/j.issn.0513-353x.2024-0515

• 栽培·生理生化 • 上一篇    下一篇

萎缩芽孢杆菌抑菌物质的鉴定及其对厚皮甜瓜贮藏期风味品质的影响

李红1,2,4, 牛新湘3,5, 吴凤康2,6, 杨红梅2,4,5, 楚敏2,4,5, 包慧芳2,4, 王宁2,4,5, 詹发强2,4, 杨蓉2,4, 娄恺2,4, 史应武1,2,4,5,*()   

  1. 1 新疆大学生命科学与技术学院,乌鲁木齐 830046
    2 新疆农业科学院微生物应用研究所,乌鲁木齐 830091
    3 新疆农业科学院土壤肥料与农业节水研究所,乌鲁木齐 830091
    4 新疆特殊环境微生物实验室,乌鲁木齐 830091
    5 农业农村部西北绿洲农业环境重点实验室,乌鲁木齐 830091
    6 新疆农业大学农学院,乌鲁木齐 830052
  • 收稿日期:2025-04-14 修回日期:2025-05-09 出版日期:2025-07-23 发布日期:2025-07-23
  • 通讯作者:
    *E-mail:
  • 基金资助:
    新疆维吾尔自治区重点研发计划项目(2022B02053-2); 新疆维吾尔自治区重点研发计划项目(2021B02004); 国家重点研发计划项目(2022YFD1400304); 国家重点研发计划项目(2021YFD1400205); 新疆维吾尔自治区重大科技专项(2022A02005-3)

Identification of Antifungal Substances of Bacillus atrophicus and Their Effects on Flavor Quality of Thick-skinned Melons During the Storage Period

LI Hong1,2,4, NIU Xinxiang3,5, WU Fengkang2,6, YANG Hongmei2,4,5, CHU Min2,4,5, BAO Huifang2,4, WANG Ning2,4,5, ZHAN Faqiang2,4, YANG Rong2,4, LOU Kai2,4, and SHI Yingwu1,2,4,5,*()   

  1. 1 College of Life Science and Technology,Xinjiang University,Urumqi 830046,China
    2 Microbial Application Research Institute,Xinjiang Academy of Agricultural Sciences,Urumqi 830091,China
    3 Institute of Soil Fertilizer and Water-Saving Agriculture,Xinjiang Academy of Agricultural Sciences,Urumqi 830091,China
    4 Xinjiang Special Environment Microbial Laboratory,Urumqi 830091,China
    5 Key Laboratory of Agro-Environment of Northwest Oasis,Ministry of Agriculture and Rural Affairs,Urumqi 830091,China
    6 College of Agriculture,Xinjiang Agricultural University,Urumqi 830052,China
  • Received:2025-04-14 Revised:2025-05-09 Published:2025-07-23 Online:2025-07-23

摘要: 为了鉴定萎缩芽孢杆菌(Bacillus atrophicus)SHZ-24产生的脂类抑菌物质,采用硅胶柱层析和液质联用(LC-MS)法对其进行鉴定;同时,在厚皮甜瓜‘西州蜜25号’上施用该菌提取的脂类抑菌物质,测定贮藏期间香气成分,以及乙醇脱氢酶(ADH)和脂氧合酶(LOX)的酶活性,探究脂类抑菌物质对厚皮甜瓜贮藏期风味品质的影响。结果表明,萎缩芽孢杆菌SHZ-24的脂类提取物对甜瓜腐烂病病原菌CH-3(Fusarium oxysporum)的抑菌活性为66.54%,有明显的抑菌作用,且起主要作用的是羟基脂肪酸类物质。将该物质作用于厚皮甜瓜‘西州蜜25号’25 d后,相较于正常贮藏的,其挥发性风味物质从25种增加到35种,其中乙酸乙酯、乙酸己脂、乙酸-2-甲基丁酯等主要风味物质相对含量明显提高;相较于病原菌处理后贮藏的,醇类、醛类、烃类物质种类和相对含量均有所降低。对厚皮甜瓜酯类代谢关键酶测定发现,相较于被病原菌侵染的厚皮甜瓜,用脂类抑菌物质处理后的乙醇脱氢酶的活性提高了4.53倍,脂氧合酶的活性提高了1.18倍,说明该菌脂类提取物能抑制病原菌侵染厚皮甜瓜,调节脂类代谢关键酶,延缓厚皮甜瓜的腐败,同时可有效维持甜瓜的香气。菌株SHZ-24脂类抑菌物质在厚皮甜瓜贮藏期间表现出较好的生物防治效果,可应用于甜瓜的贮藏保鲜。

关键词: 厚皮甜瓜, 萎缩芽孢杆菌, 脂类抑菌物质, 风味, 品质

Abstract:

In order to identify the lipidic bacteriostatic substances of Bacillus atrophicus SHZ-24,silica gel column chromatography and liquid-liquid mass spectrometry(LC-MS)were used to identify the lipidic bacteriostatic substances of strain SHZ-24 based on the previous experiments;at the same time,the lipidic bacteriostatic substances extracted from the bacterium were applied on thick-skinned melons cultivar‘Xizhoumi 25’to determine the effects of the lipidic bacteriostatic substances on the flavor quality of thick-skinned melons during the storage period and on the enzymatic activities of ethanol dehydrogenase(ADH)and lipoxygenase(LOX)during the storage period to investigate the effects of the lipid antibacterial substances on the flavor quality of thick-skinned melons during the storage period. The results showed that the lipid extract of Bacillus atrophicus SHZ-24 had obvious inhibitory effect on the melon rot pathogen CH-3(Fusarium oxysporum),with the inhibitory activity of 66.54%,and the hydroxy fatty acids were the main inhibitory substances in strain SHZ-24. The lipid inhibitory substances of strain SHZ-24 were applied to thick-skinned melons,and the volatile flavor substances increased from 25 to 35 kinds of volatile flavor substances and the types of ester substances were increased,among which the relative contents of ethyl acetate,caprolipids,2-methylbutyl acetate and other major flavor substances were obviously increased compared with those in thick-skinned melons after 25 days of storage after the treatment of pathogenic bacteria,and the types and relative contents of alcohols,aldehydes and hydrocarbons were reduced compared with those in thick-skinned melons after 25 days of storage after the treatment of pathogenic bacteria. The relative content of alcohols,aldehydes and hydrocarbons decreased. The key enzymes of ester metabolism of thick-skinned melon were measured and found that compared with the thick-skinned melon infected by pathogenic bacteria,the ethanol dehydrogenase of thick-skinned melon treated with lipid inhibitory substances of the bacterium increased 4.53 times,and the activity of lipoxygenase was increased by 1.18 times,which indicated that the lipid extracts of the bacterium could inhibit the infection of thick-skinned melons by pathogenic bacteria and at the same time regulate the key enzymes of lipid metabolism to delay the decay of thick-skinned melons and the maintenance of melon aroma. The maintenance of melon aroma was also promoted. The bacterial inhibitory substance of strain SHZ-24 showed a good biological control effect during storage of thick-skinned melons,which can be applied to the storage and preservation of melons.

Key words: Cucumis melo, Bacillus atrophicus, lipid inhibitors, flavor, quality