Based on morphology, there are 119 types of AMF spore in both coffee farms and most of them belongs to genera Acaulospora, Gigaspora, Entrophospora and Glomus. Spore types RE7, W6 and W1 belonged to Acaulospora and Y5 belonged to Entrophospora appeared in both farms. Besides, spore types B7, RE10, Yc, RE1 and Y1 were recorded in high density (1- 4 spores /g soil). All of them were the potential strains for developing the VAM fertilizer specialized to coffee plantation. | Journal of Science and Technology 55 (1AB) (2017) 1-7 DOI: ARBUSCULAR MICORRHIZAL FUNGI ASSOCIATION IN TWO COFFEE FARMS WITH DIFFERENT CULTIVATION AT LAM DONG Dang Hoang Quyen1, *, Pham Hoang Phi Phung2, Duong Hoa Xo1 1 Biotechnology Center of Ho Chi Minh City, 2374 Highway 1, District 12, Ho Chi Minh City 2 Ton Duc Thang University, 19 Nguyen Huu Tho Street, District 7, Ho Chi Minh City * Email: dhquyendl@ Received: 30 October 2016; Accepted for publication: 30 May 2017 ABSTRACT Arbuscular mycorrhizal fungi (AMF) have an important role in agriculture because of the benefits on plant and ecosystem. However, mycorrhizal association is affected by many factors such as vegetation and farming conditions. In this study, AMF system on soil and roots of coffee were investigated from two coffee farms with different cultivation method in Lam Dong Province, one was not applied fertilizer in 4 years and the other was conventional. The density, the type of mycorrhizal spore and fungal infection rate on coffee roots are different between two coffee farms. Based on morphology, there are 119 types of AMF spore in both coffee farms and most of them belongs to genera Acaulospora, Gigaspora, Entrophospora and Glomus. Spore types RE7, W6 and W1 belonged to Acaulospora and Y5 belonged to Entrophospora appeared in both farms. Besides, spore types B7, RE10, Yc, RE1 and Y1 were recorded in high density (14 spores /g soil). All of them were the potential strains for developing the VAM fertilizer specialized to coffee plantation. Keywords: AMF, coffee, farming, mycorrhiza, spore. 1. INTRODUCTION Mycorrhizas is a symbiotic association between fungi, roots, and soil. Among mycorrhizal types, arbuscular mycorrhizae (AM) is the most common. In this symbiotic relationship, the fungal extra- radical hyphae help plants absorb water and nutrients specially minerals such as Phosphorus, Potassium, Nitrogen etc. [1]. According to Andrade et al. [2], the AM
