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THE ROLE OF ENDOMYCORRHIZAE IN REVEGETATION PRACTICES IN THE SEMI‐ARID WEST. III. VERTICAL DISTRIBUTION OF VESICULAR‐ARBUSCULAR (VA) MYCORRHIZA INOCULUM POTENTIAL
Author(s) -
Schwab Suzanne,
Reeves F. Brent
Publication year - 1981
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1981.tb07839.x
Subject(s) - revegetation , biology , mycorrhiza , topsoil , arbuscular mycorrhiza , soil water , agronomy , arid , arbuscular mycorrhizal fungi , botany , horticulture , ecology , symbiosis , ecological succession , genetics , bacteria , inoculation
The changes in vesicular‐arbuscular (VA) mycorrhiza inoculum potential (MIP) in soil profiles from a mid‐elevation sage community were measured using a corn bioassay. The MIP was significantly reduced below 30 cm depth and approached zero at less than 1 m depth. The decrease in inoculum potential with depth in diluted soils did not always parallel changes in the nondiluted soil, indicating factors other than numbers of inoculum units also may be important in determining the extent of mycorrhiza formation. The relationship of these results to land disturbance and associated dilution of populations of VA mycorrhizal fungi and to defining topsoil is discussed.