| Autor: |
Qiang ZOU, Xinxiang NIU, Ping LIU, Hongmei YANG, Min CHU, Ning WANG, Qing LIN, Huifang BAO, Faqiang ZHAN, Yumeng ZHANG, Jingyi WANG, Changgeng ZUO, Kai LOU, Yingwu SHI |
| Jazyk: |
čínština |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Shipin gongye ke-ji, Vol 44, Iss 15, Pp 126-133 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
1002-0306 |
| DOI: |
10.13386/j.issn1002-0306.2022060270 |
| Popis: |
To clarify the mechanism of resistance of Bacillus velezensis TP-1 to gray mold, a marker strain TP-1R was screened for resistance to 300 μg/mL of rifampicin by an antibiotic marker method in this study. The genetic stability of the resistance of the marker strains and their antagonism to gray mold of grapes were studied, and their colonization in grapes and their effect on the activity of defence enzymes in the grapes were analysed. The results showed that the labeled strain could still grow stably in the medium containing rifampicin after 15 times of subculture, and the antagonistic effect of the labeled strain against gray mold was not significantly different from that of the original strain. The colonization amount of the labeled strain reached the peak of 4.32×106 CFU/g on the 15th day of storage (20 ℃), and was still 3.11×106 CFU/g on the 30th day of storage, indicating that strain TP-1 could be stably colonized on grapes. Inoculation of strain TP-1 fermentation broth could effectively inhibit the occurrence of gray mold and resultantly reduced the decay rate of grapes. During storage, the activity of grape defence enzymes PAL, PPO and APX increased first and then decreased, and the activity of the three enzymes in the group treated with the antagonistic bacterium TP-1 was significantly higher than CK (P |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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