Suppression of vesicular-arbuscular mycorrhizal fungus spore germination by nonsterile soil

When the effect of nonsterile soil on vesicular–arbuscular mycorrhizal fungus spore germination was examined, significantly fewer Glomus etunicatum (22 vs. 63 and 64%) or Glomus mosseae (23 vs. 80 and 79%) spores germinated in nonsterile soil than in autoclaved or pasteurized soil, respectively. In some cases, addition of nonsterile soil sievings to autoclaved or pasteurized soil also reduced germination, as compared with germination in unamended pasteurized or autoclaved soil. Germination was reduced by as much as 45% in autoclaved or pasteurized soil if spores were surface sterilized. However, surface sterilization of G. etunicatum spores did not affect dry weight of inoculated big bluestem plants, but mycorrhizal root colonization was reduced when spore-associated microbes were removed from spores by surface sterilization. The detrimental effect of soil microbes on spore germination and mycorrhizal growth response may reflect microbial competition for nutrients since germination of G. etunicatum and G....

[1]  B. Hetrick,et al.  Physical and topological assessment of effects of a vesicular-arbuscular mycorrhizal fungus on root architecture of big bluestem , 1988 .

[2]  B. Hetrick,et al.  Suppression of mycorrhizal growth response of big bluestem by non-sterile soil , 1988 .

[3]  A. P. Schwab,et al.  Effects of soil microorganisms on mycorrhizal contribution to growth of big bluestem grass in non-sterile soil , 1988 .

[4]  B. Hetrick,et al.  The influence of phosphorus fertilization, drought, fungal species, and nonsterile soil on mycorrhizal growth response in tall grass prairie plants , 1986 .

[5]  J. Barea,et al.  Effect of soil micro-organisms on spore germination and growth of the vesicular-arbuscular mycorrhizal fungus Glomus mosseae , 1986 .

[6]  Julie Meyer,et al.  RESPONSE OF SUBTERRANEAN CLOVER TO DUAL INOCULATION WITH VESICULAR-ARBUSCULAR MYCORRHIZAL FUNGI AND A PLANT GROWTH-PROMOTING BACTERIUM, PSEUDOMONAS PUTIDA , 1986 .

[7]  I. Tommerup.  Inhibition of spore germination of vesicular-arbuscular mycorrhizal fungi in soil , 1985 .

[8]  D. Hubbell,et al.  Spore Germination and Germ Tube Growth of a Vesicular-Arbuscular Mycorrhizal Fungus in Vitro , 1982 .

[9]  P. Kormanik,et al.  Quantification of vesicular-arbuscular mycorrhizae in plant roots. , 1982 .

[10]  D. Bagyaraj,et al.  INTERACTION BETWEEN BEIJERINCKIA MOBILIS, ASPERGILLUS NIGER AND GLOMUS FASCICULATUS AND THEIR EFFECTS ON GROWTH OF ONION , 1981 .

[11]  R. E. Koske.  Gigaspora Gigantea: Observations on Spore Germination of a Va-Mycorrhizal Fungus , 1981 .

[12]  J. Trappe,et al.  Factors affecting spore germination of the vesicular-arbuscular mycorrhizal fungus, Glomus epigaeus. , 1980 .

[13]  J. P. Ross.  Effect of nontreated field soil on sporulation of vesicular-arbuscular mycorrhizal fungi associated with soybean. , 1980 .

[14]  R. Miller.  Some occurrences of vesicular–arbuscular mycorrhiza in natural and disturbed ecosystems of the Red Desert , 1979 .

[15]  B. A. Daniels,et al.  Variation in Germination and Spore Morphology among Four Isolates of Glomus Mosseae , 1978 .

[16]  C. Hepper,et al.  Observation's on the germination of Endogone spores , 1976 .

[17]  J. M. Phillips,et al.  Improved procedures for clearing roots and staining parasitic and vesicular-arbuscular mycorrhizal fungi for rapid assessment of infection. , 1970 .

[18]  T. Nicolson,et al.  Vesicular-Arbuscular Mycorrhiza in the Gramineae , 1958, Nature.