Biochemical characterization of defense responses in rose genotypes in response to artificial inoculation with black spot pathogen Diplocarpon rosae

Authors

  • SAIDULU YELUGURI UHS, BAGALKOTE Author
  • Tejaswini P ICAR- Indian Institute of Horticultural Research, Bengaluru 560089 Author
  • Upreti K K ICAR- Indian Institute of Horticultural Research, Bengaluru 560089 Author
  • Sriram S ICAR- Indian Institute of Horticultural Research, Bengaluru 560089 Author
  • Seetharamu G K University of Horticultural Sciences, Bagalkote, Karnataka, 587 104, India. Author
  • Devappa V University of Horticultural Sciences, Bagalkote, Karnataka, 587 104, India. Author
  • Mythili J B University of Horticultural Sciences, Bagalkote, Karnataka, 587 104, India. Author

DOI:

https://doi.org/10.24154/jhs.v17i1.1027

Keywords:

Artificial inoculation, diplocarpon rosae, enzymes, flavonoids, phenols, resistance, rose

Abstract

Resistance responses in the leaves of eight rose genotypes, Knock Out (highly resistant), Arka Nishkant (moderately resistant), R. multiflora (highly susceptible), Arka Swadesh (highly susceptible), IIHRR 13-4 (susceptible), Arka Parimala (susceptible), R. indica (susceptible) and IIHRR 4-15-12 (moderately susceptible), exhibiting varied levels of resistance against black spot were investigated post artificial inoculation with black spot pathogen, Diplocarpon rosae. There was consistent increase in the activities of defense related enzymes such as catalase, peroxidase, polyphenol oxidase, superoxide dismutase and phenylalanine ammonia lyase and other defense related secondary metabolites like phenols and flavonoids at different phases of black spot progression and increase was high in resistant genotypes Knock Out and Arka Nishkant. The peak activity of defense enzymes and high concentration of other metabolites was witnessed during early stages of infection in the resistant genotypes while it was during later phase in the susceptible genotypes. These results suggested that the faster and stronger activation of defense system is associated with the resistance against black spot
in the rose genotypes.

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Published

30-09-2022

Issue

Section

Original Research Papers

How to Cite

YELUGURI, S., P, T. ., K K, U. ., S, S. ., G K, S. ., V, D. ., & J B, M. . (2022). Biochemical characterization of defense responses in rose genotypes in response to artificial inoculation with black spot pathogen Diplocarpon rosae. Journal of Horticultural Sciences, 17(1), 209-219. https://doi.org/10.24154/jhs.v17i1.1027

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