Vol. 10, Issue 2 (2021)

Author(s):
Amaresh H, Kantharaju V, Amruta S Bhat, K Ramachandra Naik and Mahesh YS

Abstract:
Sweet potato is a perennial vine, usually cultivated as an annual crop. Its storage roots are rich in energy and are an important source of carbohydrates, vitamin A. Root-knot nematode (Meloidogyne spp.) causes galls or knots in the roots and considerable yield loses of 10.2 per cent. Seventeen sweet potato genotypes were screened against root-knot nematode, M. incognita and were subjected for biochemical estimation of enzymes content viz., PO, PPO, PAL and total phenols, in both susceptible and resistant varieties. The results revealed that, the genotype Sree Bhadra has recorded the maximum activity of different enzymes viz., Peroxidase (3.12 abs/min/g), Polyphenol oxidase (0.127 abs/min/g), Phenyl Alanine Ammonia Lyase (22.37 nmol/min/ml), and total phenol (447.00 micro gram/g). The genotype Kanhangad Local has recorded minimum levels of Peroxidase (1.02 abs/min/g), Polyphenol oxidase (11.03 nmol/min/ml), Phenyl Alanine Ammonia Lyase (11.03 nmol/min/ml) and total phenol (107.67 micro gram/g).