Interactions of three species of plant-parasitic nematodes with arbuscular mycorrhizal fungus, Glomus macrocarpus, and their effect on grape biochemistry

• Published in: Nematology : international journal of fundamental and applied nematological research 2005, Vol.7 (6), p.945-952
• Main Authors: Kesba, Hosny H, Al-Sayed, Al-Sayed A
• Format: Article
• Language: English
• Subjects: Animal and plant ecology; Animal, plant and microbial ecology; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; LEAF ASSAY; MELOIDOGYNE INCOGNITA; ROOT ASSAY; ROTYLENCHULUS RENIFORMIS; Synecology; Terrestrial ecosystems; TYLENCHULUS SEMIPENETRANS; VITIS
• ISSN: 1388-5545; 1568-5411; 1388-5545
• DOI: 10.1163/156854105776186406

Abstract The arbuscular mycorrhizal fungus (AM fungus),Glomus macrocarpus, and the nematodes, Meloidogyne incognita and Tylenchulus semipenetrans, have negative reciprocal effects on spore production, nematode development and reproduction when coinfecting grape roots. Glomus macrocarpus was antagonistic to Rotylenchulus reniformis development and reproduction whilst the nematode was synergistic to spore production. Glomus macrocarpus alone or in combination with M. incognita or T. semipenetrans increased root protein, total soluble sugars, total carbohydrates and decreased lipids and dry matter. Glomus macrocarpus together with R. reniformis decreased protein, total soluble sugars, total carbohydrates and dry matter and greatly increased lipids. Compared to the healthy control, G. macrocarpus alone or in combination with M. incognita or R. reniformis decreased the N, P and K content of leaves. Glomus macrocarpus together with T. semipenetrans improved N, P and K concentrations but the latter was still less than that of healthy plants.