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<datestamp>2018-01-11</datestamp>
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<publisher>HAL CCSD</publisher>
<title lang=en>Divergence in symbiotic interactions between same genotypic PCR-RFLP Frankia strains and different Casuarinaceae species under natural conditions</title>
<creator>Nasr, Hafedh</creator>
<creator>Domenach, Anne-Marie</creator>
<creator>Ghorbel, Mohamed Habib</creator>
<creator>Benson, David R.</creator>
<contributor>National Research Institute for Rural Engineering Water and Forest ; Université de Tunis</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Department of Biological Sciences, Faculty of Sciences ; Université Tunis El-Manar</contributor>
<contributor>Department of Molecular and Cell Biology ; University of Connecticut (UCONN)</contributor>
<description> </description>
<source>ISSN: 0031-9317</source>
<source>EISSN: 1399-3054</source>
<source>Physiologia Plantarum</source>
<publisher>Wiley</publisher>
<identifier>hal-01032134</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01032134</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01032134</source>
<source>Physiologia Plantarum, Wiley, 2007, 130 (3), pp.400-408. 〈10.1111/j.1399-3054.2007.00856.x〉</source>
<identifier>DOI : 10.1111/j.1399-3054.2007.00856.x</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1399-3054.2007.00856.x</relation>
<language>en</language>
<subject lang=en>root-nodules</subject>
<subject lang=en>nitrogen-fixation</subject>
<subject lang=en>genetic diversity</subject>
<subject lang=en>ribosomal-rna</subject>
<subject lang=en>casuarinaceae</subject>
<subject lang=en>n-15 abundance</subject>
<subject lang=en>n-2 fixation</subject>
<subject lang=en>equisetifolia</subject>
<subject lang=en>nodulation</subject>
<subject lang=en>plants</subject>
<subject lang=en>frankia</subject>
<subject lang=en>strains</subject>
<subject lang=en>long term experiments</subject>
<subject lang=en>nucleotide sequences</subject>
<subject lang=en>polymerase chain reaction</subject>
<subject lang=en>restriction fragment length polymorphism</subject>
<subject lang=en>nodules de racine</subject>
<subject lang=en>famille des casuarinacées</subject>
<subject lang=en>filao</subject>
<subject lang=en>plantes</subject>
<subject>[SDV.BV] Life Sciences [q-bio]/Vegetal Biology</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>The symbiotic interactions between Frankia strains and their associated plants from the Casuarinaceae under controlled conditions are well documented but little is known about these interactions under natural conditions. We explored the symbiotic interactions between eight genotypically characterized Frankia strains and five Casuarinaceae species in long-term field trials. Characterization of strains was performed using the polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) for the nifD-nifK intergenic transcribed spacer (ITS) and 16S-23S ITS. Assessments of the symbiotic interactions were based on nodulation patterns using nodule dry weight and viability, and on actual N-2 fixation using the delta N-15 method. The PCR-RFLP patterns showed that the analyzed strains belonged to the same genotypic group (CeD group), regardless of the host species and environment of origin. The nodule viability index is introduced as a new tool to measure the viability of perennial nodules and to predict their effectiveness. The host Casuarinaceae species was a key factor influencing both the actual N-2-fixing activity of the associated Frankia strain and the viability of nodules within a location. This is the first study providing information on the symbiotic interactions between genotypically characterized Frankia strains and actinorhizal plants under natural conditions. The results revealed a way to improve a long-term management of the Casuarinaceae symbiosis.</description>
<date>2007</date>
</dc>
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