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Dieng A., Duponnois Robin, Ndoye I., Baudoin Ezékiel. (2017). Positive feedback with mycorrhizal fungi alleviates negative effects of intercropping the energy crop Jatropha curcas with Crotalaria retusa. Symbiosis, 73 (2), 107-116. ISSN 0334-5114

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Lien direct chez l'éditeur doi:10.1007/s13199-016-0459-y

Titre
Positive feedback with mycorrhizal fungi alleviates negative effects of intercropping the energy crop Jatropha curcas with Crotalaria retusa
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000412851600003
AuteursDieng A., Duponnois Robin, Ndoye I., Baudoin Ezékiel.
SourceSymbiosis, 2017, 73 (2), p. 107-116. ISSN 0334-5114
RésuméLittle is known about the arbuscular mycorrhizal status of the ligneous plant Jatropha curcas, an energy crop that raises high expectations worldwide. We hypothesized that its early mycorrhization and growth could be improved by co-culturing it with Crotalaria retusa, a mycotrophic legume species. Soil samples collected from a 15-year-old J. curcas hedgerow were transferred to the greenhouse, along with soil sampled from the contiguous fallow field. Three pot-culture modalities were studied for 3 months: jatropha alone, jatropha sowed after the clipping of 2-month-old C. retusa, and jatropha sowed next to 2-month-old C. retusa. J. curcas biomass was significantly lower when it was co-cultured with C. retusa in both soil types as compared to when it was grown individually, while its biomass following the cut of C. retusa was not impacted. J. curcas shoot P content was significantly improved only when both plant species grew in the hedgerow soil, and so was mycorrhization intensity. Additionally, the composition of the J. curcas root mycorrhizal community was closer to that of C. retusa when using this hedgerow soil. Overall, J. curcas development was not improved by its association with C. retusa, but the soil cropping history appeared essential to their mycorrhizal interactions. These were favored by a soil mycorrhizal community shaped by multiple years of J. curcas monoculture. Improved knowledge about these preferential association patterns with J. curcas is needed to improve its co-culture with compatible mycotrophic legumes.
Plan de classementBiotechnologies [084]
Descr. géo.SENEGAL
LocalisationFonds IRD [F B010071276]
Identifiant IRDfdi:010071276
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010071276

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