Antioxidant Mechanisms, Phenylpropanoid Pathway and Photosynthetic Responses in Pepper Cultivars: Insights Into Resistance to Xanthomonas euvesicatoria pv. euvesicatoria

Journal of Phytopathology, Journal Year: 2025, Volume and Issue: 173(2)

Published: March 1, 2025

ABSTRACT Changes in environmental conditions, intensified by the progression of global warming, have created favourable conditions for spread and intensification diseases various agricultural crops. Obtaining cultivars resistant to abiotic biotic stresses may be one solutions. In this study, resistance three pepper Xanthomonas euvesicatoria pv. was analysed inside a greenhouse, evaluating severity disease over time. The participation biochemical structural mechanisms defence plants against pathogen investigated based on determination activity antioxidant enzymes such as guaiacol peroxidase (POX), catalase (CAT), polyphenol oxidase (PPO) lipoxygenase (LPOX). quantification components phenylpropanoid pathway (phenylalanine ammonia lyase [PAL], phenolic compounds flavonoids), observation number stomatal cells with hypersensitivity reaction (HR) content chlorophyll , b carotenoids were also evaluated. Plants All Big, Yolo Wonder Amarelo SF challenged X. evaluated at 14, 21 28 days after inoculation. Leaf samples collected 24, 48 96 h inoculation (HAI) photosynthetic analyses. Big cultivar exhibited 50% higher compared cultivars, which did not differ significantly from each other. HAI, POX 37% than 27% Wonder. Additionally, PPO 46% 55% After inoculation, showed highest CAT enzyme activity, 43% SF, but no significant differences Big. Furthermore, stood out its LPOX 14% 22% On other hand, exhibiting 31% more undergoing hypersensitive response Wonder, relative displayed levels, exceeding those observed 18% 17%. Despite peaks PAL well accumulation flavonoids, statistically found among any measured parameters. This article explores discusses role mechanisms, system, pigments, pathosystem involving bell .

Language: Английский

Unravelling fungal pathogenesis: Advances in CRISPR-Cas9 for understanding virulence and adaptation

Fungal Genetics and Biology, Journal Year: 2025, Volume and Issue: 179, P. 104006 - 104006

Published: May 25, 2025

Language: Английский

Decoding fungal communication networks: molecular signaling, genetic regulation, and ecological implications

Functional & Integrative Genomics, Journal Year: 2025, Volume and Issue: 25(1)

Published: May 29, 2025

Language: Английский