Abstract
The beet curly top virus-severe and beet curly top Iran virus are the main causal agents of curly top disease (CTD) in Iran. CTD has been described for a long time as one of the viral diseases of coriander that causes severe losses in seed production. An effective approach to managing plant viral diseases is to introduce resistant cultivars. Therefore, this study aimed to identify resistant coriander accessions for CTD. The study employed a completely randomized design with 10 replications to investigate the reaction of 10 coriander accessions, which were inoculated using agroinoculation. The inoculated plants were analyzed by measuring phenotypic, physiological and biochemical parameters, and virus accumulation. The results revealed that phenolic compounds, phenylalanine ammonia-lyase, polyphenol oxidase activity, guaiacol peroxidase, total chlorophyll content, and photosynthesis rate were elevated in resistant accessions to cope with virus inoculation. Resistant accessions exhibited normal growth and seed production similar to their mock-inoculated controls. Through principal component analysis and hierarchical cluster analysis, it was confirmed that accessions 111,230 and 230,160 were highly resistant to both viruses. These findings suggest that these accessions can be utilized in breeding programs to develop virus-resistant cultivars.
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