Bourles A., Guentas L., Charvis C., Gensous S., Majorel Clarisse, Crossay T., Cavaloc Y., Burtet-Sarramegna V., Jourand Philippe, Amir H. (2020). Co-inoculation with a bacterium and arbuscular mycorrhizal fungi improves root colonization, plant mineral nutrition, and plant growth of a Cyperaceae plant in an ultramafic soil. Mycorrhiza, 30 (1), p. 121-131. ISSN 1432-1890.
Titre du document
Co-inoculation with a bacterium and arbuscular mycorrhizal fungi improves root colonization, plant mineral nutrition, and plant growth of a Cyperaceae plant in an ultramafic soil
Année de publication
2020
Auteurs
Bourles A., Guentas L., Charvis C., Gensous S., Majorel Clarisse, Crossay T., Cavaloc Y., Burtet-Sarramegna V., Jourand Philippe, Amir H.
Source
Mycorrhiza, 2020,
30 (1), p. 121-131 ISSN 1432-1890
The ecological restoration of nickel mining-degraded areas in New Caledonia is strongly limited by low availability of soil mineral nutrients, metal toxicity, and slow growth rates of native plant species. In order to improve plant growth for restoration programs, special attention was paid to interactions between plant and soil microorganisms. In this study, we evaluated the influence of inoculation with Curtobacterium citreum BE isolated from a New Caledonian ultramafic soil on arbuscular mycorrhizal symbiosis and growth of Tetraria comosa, an endemic sedge used in restoration programs. A greenhouse experiment on ultramafic substrate was conducted with an inoculum comprising two arbuscular mycorrhizal fungi (AMF) species isolated from New Caledonian ultramafic soils: Rhizophagus neocaledonicus and Claroideoglomus etunicatum. The effects on plant growth of the AMF and C. citreum BE inoculated separately were not significant, but their co-inoculation significantly enhanced the dry weight of T. comosa compared with the non-inoculated control. These differences were positively correlated with mycorrhizal colonization which was improved by C. citreum BE. Compared with the control, co-inoculated plants were characterized by better mineral nutrition, a higher Ca/Mg ratio, and lower metal translocation. However, for Ca/Mg ratio and metal translocation, there were no significant differences between the effects of AMF inoculation and co-inoculation.
Plan de classement
Sciences du milieu [021]
;
Pédologie [068]
;
Biotechnologies [084]
Localisation
Fonds IRD [F B010077705]
Identifiant IRD
fdi:010077705
