RESUMOO trabalho foi realizado em cafeeiros cultivados a pleno sol e consorciado com grevíleas em Vitória da Conquista (BA), em duas estações: seca e chuvosa, com objetivo de verificar a influência da arborização dos cafezais e da disponibilidade hídrica sobre a densidade de Fungos Micorrízicos Arbusculares (FMA) e ainda relacionar tais fatores com aspectos fisiológicos do cafeeiro. O experimento foi realizado em campos de observação com dois tratamentos e seis repetições, sendo as médias comparadas pelo teste t (p<0,05), relacionando os sistemas e as estações. Verificou-se maior número de esporos em época seca. A taxa de colonização radicular de FMA foi maior no cultivo consorciado, não diferindo em função da estação. O manejo dos cafeeiros sob sombra e a época seca contribuíram para maior teor de clorofila nas folhas. Maior valor absoluto do potencial hídrico foliar foi verificado quando avaliado na época chuvosa. Palavras-chave:Grevillea robusta A. Cunn., Coffea arabica L., micorrizas ABSTRACT ARBUSCULAR MYCORRHIZAL FUNGI AND PHYSIOLOGICAL ASPECTS OF COFFEE CONDUCTED IN AGROFLORESTAL SYSTEM AND AT FULL SUNThe work was performed aiming to check the influence of the agroforestry system and water availability on the density of Arbuscular Mycorrhizal Fungi (AMF), and to correlate these factors with physiological aspects of coffee. This study was conducted in a full sun coffee field, where coffee plants were associated with grevilea during dry and rainy seasons. The experiment had two treatments and six replicates, and the resulting averages were compared by a t test at 5% of probability, comparing the systems and seasons. There was a rise in spore number in the dry season. Also the rate of root colonization of AMF was higher in intercropped cultivation but it did not differ between seasons. The shading of coffee plants in dry season promoted a raise of leaf Spad index. In the rainy season the leaf water potential had higher absolute value.
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