Bacteria associated with Glomus clarum spores influence mycorrhizal activity

The effects of bacteria associated with arbuscular mycorrhizal fungal (AMF) spores on spore germination, growth in vitro and on the pea-AMF symbiosis were evaluated. Bacterial colonies were recovered from untreated Glomus clarum NT4 spores and NT4 spores decontaminated with 5% chloramine-T for 30, 4...

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Published in:Soil biology & biochemistry 2003-03, Vol.35 (3), p.471-478
Main Authors: Xavier, Lisette J.C, Germida, James J
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Arbuscular mycorrhizal fungi
Biological and medical sciences
Economic plant physiology
Fundamental and applied biological sciences. Psychology
Inhibition
Spore associated bacteria
Stimulation
Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)
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description The effects of bacteria associated with arbuscular mycorrhizal fungal (AMF) spores on spore germination, growth in vitro and on the pea-AMF symbiosis were evaluated. Bacterial colonies were recovered from untreated Glomus clarum NT4 spores and NT4 spores decontaminated with 5% chloramine-T for 30, 45 and 60 min on five different media. Both G+ and G− bacteria were recovered from untreated NT4 spores, whereas only G+ bacteria were isolated from decontaminated spores. An in vitro assessment of the effect of spore-associated bacteria on clean, decontaminated NT4 spores revealed that (i) most of the bacteria isolated from untreated spores generally did not significantly alter spore function, (ii) some bacteria isolated from clean, decontaminated spores inhibited or stimulated NT4 spore germination, (iii) stimulation of spore germination occurred only when bacteria were in contact with spores, and (iv) inhibition of spore germination was the result of volatile bacterial metabolites. A stimulatory bacterial isolate, Bacillus pabuli LA3, significantly ( P
doi_str_mv 10.1016/S0038-0717(03)00003-8
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A stimulatory bacterial isolate, Bacillus pabuli LA3, significantly ( P&lt;0.05) enhanced the shoot growth, AMF-colonization, shoot N content and P use efficiency of NT4-inoculated 6 week-old pea plants over that of plants co-inoculated with an inhibitory bacterial isolate, Bacillus chitinosporus LA6a and NT4.</description><identifier>ISSN: 0038-0717</identifier><identifier>EISSN: 1879-3428</identifier><identifier>DOI: 10.1016/S0038-0717(03)00003-8</identifier><identifier>CODEN: SBIOAH</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Agronomy. Soil science and plant productions ; Arbuscular mycorrhizal fungi ; Biological and medical sciences ; Economic plant physiology ; Fundamental and applied biological sciences. 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subjects Agronomy. Soil science and plant productions
Arbuscular mycorrhizal fungi
Biological and medical sciences
Economic plant physiology
Fundamental and applied biological sciences. Psychology
Inhibition
Spore associated bacteria
Stimulation
Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...)
title Bacteria associated with Glomus clarum spores influence mycorrhizal activity
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