Resumo

VALLEJOS-TORRES, Geomar et al. Effect of arbuscular mycorrhizae in clones of Coffea arabica, Caturra variety. Acta Agron. [online]. 2019, vol.68, n.4, pp.278-284. ISSN 0120-2812.  https://doi.org/10.15446/acag.v68n4.72117.

The effect of inoculation of arbuscular mycorrhizal fungi on the morphological characteristics of coffee clonal plants (Coffea arabica L.) Caturra variety in greenhouse environments was evaluated. The study was conducted in the province of Rodríguez de Mendoza, Amazonas region, Peru, using a completely randomized design with three repetitions and thirteen treatments. Mycorrhizal fungi were isolated from coffee farms and multiplied with corn trap plants (Zea mays). The coffee clones were rooted in sterilized substrate and subsequently inoculated with 1500 spores of the fungus. The best results were found with fungi from San Nicolás-1 inoculated in the Typical variety, inocula from Omia V in this same variety and from Omia VI in the Caturra variety. With these inoculums, differences were found (P <0.005) in plant height, production of DM of the aerial and root part in relation to the uninoculated control. Root colonization and the population of extra-root mycelium were affected by the origin of the AMF. This study confirms that coffee cultivation is dependent on the symbiotic association with native arbuscular mycorrhizal fungi (HMA-N), aiding in the absorption of nutrients and water necessary for plant growth and development.

Palavras-chave : Coffee; mycorrhizal frequency; inoculum; mycorrhizal intensity; mycelium.

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