TAILIEUCHUNG - Báo cáo lâm nghiệp: "Relations between rhizobial nodulation and root colonization of Acacia crassicarpa provenances by an arbuscular mycorrhizal fungus, Glomus intraradices Schenk and Smith or an ectomycorrhizal fungus, Pisolithus tinctorius Coker & Couch"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài:"Relations between rhizobial nodulation and root colonization of Acacia crassicarpa provenances by an arbuscular mycorrhizal fungus, Glomus intraradices Schenk and Smith or an ectomycorrhizal fungus, Pisolithus tinctorius Coker & Couch" | Ann. For. Sci. 62 2005 467-474 INRA EDP Sciences 2005 DOI forest 2005043 467 Original article Relations between rhizobial nodulation and root colonization of Acacia crassicarpa provenances by an arbuscular mycorrhizal fungus Glomus intraradices Schenk and Smith or an ectomycorrhizal fungus Pisolithus tinctorius Coker Couch Didier LESUEURa b Robin DUPONNOISc d a Forest Department of CIRAD UPR 80 Laboratoire Commun de Microbiologie IRD UCAD ISRA Centre de Bel Air BP 1386 Dakar Senegal b Present address Forest Department of CIRAD UPR 80 Tropical Soil Biology and Fertility Institute of CIAT TSBF CIAT World Agroforestry Centre PO Box 30677 Nairobi Kenya c UMR 113 IRD CIRAD AGRO-M UM2 USC INRA 1242 Laboratoire des Symbioses Tropicales et Méditerranéennes LSTM Campus International de Baillarguet 34398 Montpellier France d Present address IRD 01 BP 182 Ouagadougou Burkina Faso Received 8 April 2004 accepted 12 April 2005 Abstract - The present study was initiated to i determine the ability of an ectomycorrhizal and an arbuscular mycorrhizal symbiont to colonize three provenances of Acacia crassicarpa root systems ii to examine plant growth response to the mycorrhizal inoculation and iii to measure their influence on the rhizobial symbiosis with a Bradyrhizobium isolate. This study has been performed with 2 fungal symbionts Glomus intraradices an Arbuscular Mycorrhizal fungus and an ectomycorrhizal fungus Pisolithus tinctorius strain GEMAS. Two experiments have been performed during two different climatic periods hot season 30 C day 20 C night June to October for ectomycorrhizal inoculation and cold season 25 C day 15 C night November to March for endomycorrhizal inoculation. Moreover Bradyrhizobium sp. strain Aus13C has been co-inoculated with each of these fungal symbionts. The results showed that ectomycorrhizal and AM fungal symbiosis clearly benefit to the growth of A. crassicarpa provenances and these fungal symbioses greatly improve the rhizobial nodulation .

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