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VOL. 11, ISSUE 3 (2026)
Phenoloxidase-mediated melanization and oxidative defense enzyme responses in Anax junius Dragonfly Nymphs
Authors
M Thejomoorthy, K Vanaja, B Jameela Beebi, R Kamli Naik, R Chandra Mouli, N Raj Kumar
Abstract
This study looked into phenoloxidase-mediated
melanization and oxidative defense enzyme responses in Anax junius dragonfly
nymphs to better understand their involvement in innate immunity and oxidative
stress management. Exposure to an experimental challenge resulted in a 102.8%
increase in phenoloxidase activity and a 68.4% rise in melanization intensity.
Superoxide dismutase activity rose from 18.62 ± 0.74 to 27.45 ± 1.12 U/mg
protein, while catalase activity increased from 14.38 ± 0.63 to 22.16 ± 0.91
U/mg protein. Glutathione-S-transferase activity went up from 6.21 ± 0.37 to
10.84 ± 0.52 U/mg protein. These reactions suggest that A. junius nymphs'
melanization and antioxidant defenses are activated in tandem.
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Pages:499-505
How to cite this article:
M Thejomoorthy, K Vanaja, B Jameela Beebi, R Kamli Naik, R Chandra Mouli, N Raj Kumar "Phenoloxidase-mediated melanization and oxidative defense enzyme responses in <i>Anax junius</i> Dragonfly Nymphs". International Journal of Entomology Research, Vol 11, Issue 3, 2026, Pages 499-505
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