1,721,076 research outputs found
Suppression of Rhizoctonia root rot of tomato by Glomus mosseae BEG12 and Pseudomonas fuorescens A6RI is associated with combined modes of action
No full textInfluence of the soil type on the multitrophic plant microbe interactions involving root symbiosis
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CELL ORGANIZATION OF PSEUDOMONAS FLUORESCENS C7R12 ON ADVENTITIOUS ROOTS OF MEDICAGO TRUNCATULA AS AFFECTED BY ARBUSCULAR MYCORRHIZA
No full textSuppression of root-rot by Glomus mosseae and Pseudomonas fluorescens is associated with their effect on the pathogen and on root morphogenesis
No full textGlomus mosseae BEG12 and Pseudomonas fluorescens A6RI overcome growth depression and root morphogenetic modifications induced by Rhizoctonia solani in tomato plant
No full textSuppression of Rhizoctonia root-rot of tomato by Glomus mosseae BEG12 and Pseudomonas fluorescens A6RI is associated with their effect on the pathogen growth and on root morphogenesis
No full textColonization of adventitious roots of Medicago truncatula by Pseudomonas fuorescens C7R12 as affected by arbuscular mycorrhiza
No full textInternational audiencePseudomonas fluorescens C7R12 was previously shown to promote colonization of Medicago truncatula roots by Glomus mosseae BEG12. To gain more insight into the interaction between C7R12 and BEG12, the cell organization of C7R12 was characterized on adventitious roots mycorrhized or not with BEG12 and on extraradical hyphae. Bacterial cell observations were made using the immuno-fluorescence technique and confocal laser scanning microscopy. Five types of cell organization, so-called organization types (OT), were identified: small or large single cells, cells by pair and cells in microcolonies or in strings. The frequencies of each OT on the roots were expressed as the percentage of observations in which these OTs were represented. The OT frequencies on mycorrhizal and nonmycorrhizal roots differed significantly. Bacterial cells were more frequently single on mycorrhizal than on nonmycorrhizal roots, and in microcolonies and strings on nonmycorrhizal roots. Furthermore, the root area covered by bacterial cells, as assessed by image analysis, appeared to be significantly lower on mycorrhizal than on nonmycorrhizal roots. C7R12 cells were abundant on extraradical hyphae and organized both as single cells and microcolonies. Taken together, these results suggest that P. fluorescens C7R12 cells were less active and less abundant on mycorrhizal than on nonmycorrhizal roots
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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