Back to Search
Start Over
Attributes of Cyazofamid-Resistant Phytophthora litchiiMutants and Its Impact on Quality of Litchi Fruits
- Source :
- Journal of Agricultural and Food Chemistry; 20230101, Issue: Preprints
- Publication Year :
- 2023
-
Abstract
- In this study, we determined the sensitivity of 148 Phytophthora litchiiisolates to cyazofamid, yielding a mean EC50value of 0.0091 ± 0.0028 μg/mL. Through fungicide adaptation, resistant mutants (RMs) carrying the F220L substitution in PlCyt b were derived from wild-type isolates. Notably, these RMs exhibited a lower fitness compared with the parental isolates. Molecular docking analysis further revealed that the F220L change contributed to a decrease in the binding energy between cyazofamid and PlCyt b. The total phenol and flavonoid contents in the litchi pericarp treated with cyazofamid on day 5 were significantly higher than in other treatments. Overall, the laboratory assessment indicated a moderate risk of cyazofamid resistance in P. litchii, but the emergence of the F220L change could lead to a high level of resistance. Thus, cyazofamid represents a promising agrochemical for controlling postharvest litchi downy blight and extending the shelf life of litchi fruits.
Details
- Language :
- English
- ISSN :
- 00218561 and 15205118
- Issue :
- Preprints
- Database :
- Supplemental Index
- Journal :
- Journal of Agricultural and Food Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs64999154
- Full Text :
- https://doi.org/10.1021/acs.jafc.3c07325