Biocontrol of root-knot nematode by arbuscular mycorrhizal fungi in Luffa cylindrica
2013
Hajra, N. (Jinnah Univ. for Women, Karachi (Pakistan). Dept. of Botany) | Shahina, F. (Karachi Univ. (Pakistan). National Nematological Research Centre) | Firoza, K. (Karachi Univ. (Pakistan). National Nematological Research Centre)
Experiment was conducted to evaluate the efficacy of arbuscular mycorrhizal (AM) fungi (Glomus spp. and Gigaspora spp.) as bioprotectant against root-knot nematode Meloidogyne incognita in sponge gourd (Luffa cylindrica (L.) Roem.), mycorrhizal plant of family Cucurbitaceae. All parameters were estimated in roots, shoot and leaves of mycorrhizal and non mycorrhizal plants. Physical/biochemical and carbon profile were taken into account. Comparative study clearly indicates the significant variations in all parameters. Leaf area and plant height were increased in mycorrhizal plants than non-mycorrhizal, while it showed a sharp decrease in nematode infected plants, same plants also showed less water content due to xylem vessels damage. However, in mycorrhizal plants, roots had large amount of carbohydrates indicating transfer of photosynthates to fungal partner. Nematode infected roots have least amount of carbohydrates showing a great sink of carbon to rhizosphere.
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