Journal of Taiwan Agricultural Research

Author:Su-Chen Lin, Kun-Huang Houng, and Chi-Guang Wu

Abstract:

A general survey of arbuscular mycorrhizal fungi (AMF) in some representative soils of Taiwan was conducted to investigate their diversity and quantity, as well as the correlation between spore number and soil compositions. The results indicated that 19 soil samples among 69 collection sites (28%) could not retrieve any spore, and 63 samples (91%) contained spores less than 100 spores/100g soil. Totally, 15 species of AMF were recorded from 69 collected soils, and among which 8 species were identified in more than 6 soils. These species included Acaulospora mellea (10/69), A. morrowiae (25/69), A. scrobiculata (8/69), Glomus claroideum (10/69), G. etunicatum (7/69), G. mosseae (10/69), G. occultum (16/69), and G. spurcum (6/69). The most productive species were G. spurcum (349.7 spores/100g soil) and A. scrobiculata (98.1 spores/100g soil). The correlation between spore number and the contents of clay, organic matter, available nitrogen, available phosphorus, exchangeable potassium, sodium, calcium and magnesium as well as cation exchangeable capacity (CEC) was not significant; however, for the species of A. mellea, the spore number was positively related to the exchangeable sodium contents in the collected soils. In this study, VA mycorrhizal fungi were mostly recovered from the soils containing organic material < 5.5%, available N < 75 mg/kg, and available P < 75 mg/kg. Based on the species frequency identified among soil samples, A. morrowiae was mainly isolated from acidic soils, and G. mosseae was frequently identified from wealdy acidic to neutral soils. However, G. occultum seems to favor broader range of distribution, from acidic to alkaline soils.

Key words:Arbuscular mycorrhizal fungi, Ecology

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