Effects of Land use Changes on Arbuscular Mycorrhizal Fungi Abundance and Diversity in Selected Agro-ecological Zones of Ethiopia: Implications for Sustainable Agro-ecosystems

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Addis Ababa Universty


Arbuscular mycorrhizal (AM) filllgi association of six li'uit plant speeics [Mallgijera illdica L. (mango), l\1usa aculllinate Colla. (banana), Carica papaya L. (papaya), Citl'llS lilllOIl Risso. (lemon), Persea alllericana Mill. (avocado), and PsidiulII guajava L. (guava)] was investigated fi'om a low land area of Showa Robi!. Perecntage root colonization, spore abundance, species richness and diversity were examined. The resuit showed that ft'uit crops fell into higher spore density group of(7.2-8.8 spores g'l of soil) and low spore density group (3.7-5.3 spores g,t of soil). Accordingly, mango (1\1aJlgtfeJ'{[ il1dica), avocado (Persea americana), banana (J\1usa aCliminate), and Icmon (Citl'lIs lilllon) were fi'om thc high density spore group; whereas, papaya (Carica papaya), and guava (PsidiulII guqiava) fell into thc low spore density group at P <0.05. The AM colonization also showed that mango and lemon have high myeorrhization (71.7%), which guava has a low mycorrhization of27.3%. A total of 32 morpho species into 12 gencra were characterized fi'om all the fruit crops. The highest AMF species richness was in mango (18 species) followed by banana (16 species) and guava (14 spccies). The species Clal'OideoglolJlus c1aroideulli and Glolllus aggregatlIIn were the dominant specics ("generalists") among the fi'uit trees . . A total of 13 AMF species were detected in only one of the tested fruit trees, out of which foUl' species were recovered li'om mango indicating that the crops arc selective to specific mycorrhizal fill1gi. Key words: Arbuscular mycorrhizal fungi (AM F); GIOIIIIIS; Root colonization; Spore abundances



Arbuscular mycorrhizal fungi (AM F), Glomus, Root colonization, Spore abundances