期刊
ANTIBIOTICS-BASEL
卷 10, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/antibiotics10121449
关键词
allicin; chitosan; Sphaerotheca sp; antibiotic; Rosa roxburghii
资金
- National Natural Science Foundation of China [32160656]
- Science-Technology Support Program of Guizhou Province [(2019)2407, (2020)1Y134, (2021) YB243]
- Hundred Level Innovative Talent Foundation of Guizhou Province [20164016]
- Cultivation Program of Guizhou University [(2019)09]
The co-application of allicin and chitosan significantly enhances the resistance of Rosa roxburghii against powdery mildew, increases photosynthetic rate and chlorophyll content, promotes plant growth and fruit yield, and improves fruit quality. This alternative strategy is effective, cost-efficient, and environmentally friendly compared to conventional antibiotics for controlling powdery mildew in Rosa roxburghii production areas.
Powdery mildew, caused by Sphaerotheca sp., annually causes severe losses in yield and quality in Rosa roxburghii production areas of southwest China. In this study, the role of the co-application of allicin and chitosan in the resistance of R. roxburghii against powdery mildew and its effects on growth, yield and quality of R. roxburghii were investigated. The laboratory toxicity test results show that allicin exhibited a superior antifungal activity against Sphaerotheca sp. with EC50 value of 148.65 mg kg(-1). In the field, the foliar application of allicin could effectively enhance chitosan against powdery mildew with control efficacy of 85.97% by spraying 5% allicin microemulsion (ME) 100-time liquid + chitosan 100-time liquid, which was significantly (p < 0.01) higher than 76.70% of allicin, 70.93% of chitosan and 60.23% of polyoxin. The co-application of allicin and chitosan effectively enhanced the photosynthetic rate and chlorophyll of R. roxburghii compared with allicin, chitosan or polyoxin alone. Moreover, allicin used together with chitosan was more effective than allicin or chitosan alone in enhancing R. roxburghii plant growth and fruit yield as well as improving R. roxburghii fruit quality. This work highlights that the co-application of allicin and chitosan can be used as a green, cost-effective and environmentally friendly alternative strategy to conventional antibiotics for controlling powdery mildew of R. roxburghii.
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