Open AccessNematophagous fungi in the rhizosphere of agricultural crops
Author(s) -
Persmark Lotta,
Jansson HansBörje
Publication year - 1997
Publication title -
fems microbiology ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.377
H-Index - 155
eISSN - 1574-6941
pISSN - 0168-6496
DOI - 10.1111/j.1574-6941.1997.tb00382.x
Subject(s) - rhizosphere , biology , white mustard , nematode , bulk soil , agronomy , botany , ecology , bacteria , genetics
In a field experiment the rhizosphere effect of barley, pea and white mustard on the nematode‐trapping fungi were investigated throughout a growing season. The densities of nematode‐trapping fungi were slightly increased in the rhizospheres compared to the root‐free soil. Pea rhizosphere had the greatest numbers of species of nematophagous fungi with an average of 2.4 species recovered from 0.1 g material, and in white mustard and barley rhizospheres and root‐free soil less than 1.7 species were recovered from 0.1 g. Arthrobotrys oligospora was the most common species in both soil and rhizosphere. In a pot experiment the rhizosphere effect of pea and barley on nematophagous fungi was investigated in 5 different agricultural soils. Pea rhizosphere increased the densities of nematode‐trapping fungi, and up to 780 propagules of nematode‐trapping fungi g −1 rhizosphere soil were found, which was around 19 times higher than in the root‐free soil. The number of nematodes were 6–290 times higher in the pea rhizosphere than in the root‐free soil. Barley rhizosphere had little effect on the densities of nematode‐trapping fungi, while the number of nematodes increased by 3–13 times. The most commonly detected species were A. oligospora, Stylopage sp. and network‐forming Monacrosporium species, but there were no big differences in the species composition between the rhizosphere and the root‐free soil.