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<title lang=fr>Nodulation and dinitrogen fixation of legume trees in a tropical freshwater swamp forest in French Guiana</title>
<creator>Koponen, Piia</creator>
<creator>Nygren, Pekka</creator>
<creator>Domenach, Anne Marie</creator>
<creator>Le Roux, Christine</creator>
<creator>Saur, Etienne</creator>
<creator>ROGGY, Jean-Christophe</creator>
<contributor>Department of Forest Ecology [Helsinki] ; University of Helsinki [Helsinki]</contributor>
<contributor>Center for Agroforestry ; University of Missouri (Saisissez le sigle en majuscules sans points)</contributor>
<contributor>Ecologie microbienne (EM) ; Institut National de la Recherche Agronomique (INRA) - Université Claude Bernard Lyon 1 (UCBL) - Ecole Nationale Vétérinaire de Lyon (ENVL) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Laboratoire des symbioses tropicales et méditerranéennes (LSTM) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Université Montpellier 1 (UM1) - Institut National de la Recherche Agronomique (INRA) - Université Montpellier 2 - Sciences et Techniques (UM2) - Université de Montpellier (UM) - Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)</contributor>
<contributor>Transfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés (TCEM) ; Institut National de la Recherche Agronomique (INRA) - École Nationale d'Ingénieurs des Travaux Agricoles - Bordeaux (ENITAB)</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Ecole Nationale du Génie Rural, des Eaux et des Forêts (ENGREF) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<source>ISSN: 0266-4674</source>
<source>EISSN: 1469-7831</source>
<source>Journal of Tropical Ecology</source>
<publisher>Cambridge University Press (CUP)</publisher>
<identifier>hal-01189191</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01189191</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01189191</source>
<source>Journal of Tropical Ecology, Cambridge University Press (CUP), 2003, 19 (6), pp.655-666. 〈10.1017/S0266467403006059〉</source>
<identifier>PRODINRA : 13151</identifier>
<identifier>DOI : 10.1017/S0266467403006059</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1017/S0266467403006059</relation>
<language>en</language>
<subject lang=en>ACETYLENE REDUCTION ASSAY</subject>
<subject lang=en>BRADYRHIZOBIUM</subject>
<subject lang=en>FLOODING</subject>
<subject lang=en>MICROTOPOGRAPHY</subject>
<subject lang=en>16S RDNA SEQUENCING</subject>
<subject lang=en>PTEROCARPUS</subject>
<subject lang=en>SEQUENCE NUCLEOTIDE</subject>
<subject>[SDV] Life Sciences [q-bio]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Nodulated legume trees comprised 43% of the stand basal area in the low, most frequently flooded microsites, and 23% in higher, drier microsites in a tropical freshwater swamp forest in French Guiana. Dinitrogen fixation in Pterocarpus officinalis, Hydrochorea corymbosa and Inga pilosula was confirmed by acetylene reduction assay (ARA), presence of leghaemoglobin in nodules and the N-15 natural abundance method. The results for Zygia cataractae were inconclusive but suggested N-2 fixation in drier microsites. Nodulated Inga disticha had a N-15-to-N-14 ratio similar to non-N-2-fixing trees, but ARA indicated nitrogenase activity and leghaemoglobin was present in nodules. All bacterial strains were identified as Bradyrhizobium spp. according to the partial 16S rDNA sequences, and they were infective in vitro in the model species Macroptilium atropurpuretan. About 35-50% of N in the leaves of P. officinalis, H. corymbosa and I. pilosula was fixed from the atmosphere. Dinitrogen fixation was estimated to contribute at least 8-13% and 1728% to whole-canopy N in high and low microsites, respectively. Symbiotic N, fixation appears to provide both a competitive advantage to legume trees under N-limited, flooded conditions and an important N input to neotropical freshwater swamp forests.</description>
<date>2003</date>
</dc>
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