Resumo

RODRIGUEZ YON, Yakelin; NOVAL PONS, Blanca de la; FERNANDEZ MARTIN, Félix  e  RODRIGUEZ HERNANDEZ, Pedro. Comparative study of behaviour of six arbuscular mycorrhizal fungi when colonize tomato plants (Lycopersicon esculentum M. var "Amalia"). Ecol. apl. [online]. 2004, vol.3, n.1-2, pp.162-171. ISSN 1726-2216.

Due to ecological and economical importance of arbuscular mycorrhizal fungi (AMF), in Cuba and others countries, there are programs for their introduction as a biofertilizers. The present work aimed to do a comparative study of six AMF strains, in their interaction with tomato seedlings "Amalia" variety, through fungal, agronomics and biochemical indicators with the aim to evaluate the colonization pattern differences of the different strains and select the best strain for this crop under the studied conditions. The AMF strains studied were Glomus fasciculatum, G. clarum, G. mosseae, Glomus sp.1, G. intrarradices y Acaulospora scrobiculata. At 18 and 32 days after seed germination, height, fresh and dry mass (aerial, radical and total) and radical specific activity of chitinase, β-1,3-glucanase and phenylalanine ammonia lyase (PAL); as well as fungal variables of colonization (%) and visual density (%) at 32 days. In general, a positive effect of inoculation on tomato seedlings expressed in agronomic and fungal indicators studied was found. Enzymatic activities showed different responses in tomato seedlings according to AMF strains, being G. fasciculatum the most effective strain for this interaction under the studied conditions.

Palavras-chave : arbuscular mycorrhizal fungi; tomato; chitinase; -1,3-glucanase; PAL.

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