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T. Wilkinson ; A. Douglas | 1998The symbiotic bacteria Buchnera in aphids are borne in cells, called bacteriocytes, in the insect haemocoel. The number and median volume of bacteriocytes in pre-reproductive adult insects varied significantly among 14 parthenogenetic clones of [...]article/chapitre/communication
T. Wilkinson ; H. Ishikawa | 2000The symbiotic bacteria Buchnera contribute to the nutrition of pea aphids, Acyrthosiphon pisum, through the provision of essential amino acids which are lacking in the diet. However, chemically defined diets, containing nutritionally adequate am[...]article/chapitre/communication
T. Wilkinson ; H. Ishikawa | 2001All phloem-feeding Homoptera possess symbiotic microorganisms. Although the phylogenetic position and anatomical location of the micro- organisms differ, the underlying theme of the symbiosis is the same; the microorganisms improve the nutrition[...]article/chapitre/communication
T. Wilkinson | 1998Antibiotics are routinely used to eliminate intracellular prokaryotic microorganisms from a wide range of insect species, but concerns about deleterious effects of antibiotic therapy on the insect host are seldom addressed. Here, the impact of a[...]article/chapitre/communication
G. Febvay ; I. Liadouze ; J. Guillaud ; G. Bonnot | 1995article/chapitre/communication
T. Wilkinson ; A. Douglas | 1995Pea aphids (Acyrthosiphon pisum) whose symbiotic bacteria were disrupted with the antibiotic chlortetracycline over the first 5 days after birth (i.e, aposymbiotic aphids), were able to feed from the host plant Vicia faba, as indicated by the re[...]article/chapitre/communication
C. Caillaud ; Y. Rahbe | 1999article/chapitre/communication
I. Liadouze ; G. Febvay ; J. Guillaud ; G. Bonnot | 1995Free amino acid pools were analysed in Acyrthosiphon pisum reared on Vicia faba L. and on three artificial diets with different amino acid profiles: diets A and B copying the very unbalanced profiles of phloem saps of alfalfa and broad bean resp[...]article/chapitre/communication
G. Febvay ; Y. Rahbe ; M. Rynkiewicz ; J. Guillaud ; G. Bonnot | 1999The fate of sucrose, the major nutrient of an aphid's natural food, was explored by radiolabeling in the pea aphid Acyrthosiphon pisum. To investigate the influence of nitrogen quality of food on amino acid neosynthesis, pea aphids were reared o[...]article/chapitre/communication
K. Komaki ; H. Ishikawa | 2000Buchnera, endosymbiotic bacteria of aphids possess many genomic copies per cell. In this study, we estimated genomic copy number per Buchnera cell from host insects at various developmental stages and of two different morphs, apterae and alatae,[...]article/chapitre/communication
D. Adams ; A. Douglas | 1997To explore the effect of rearing-plant species on the contribution of the symbiotic bacterium, Buchnera, to aphid performance. larvae of Aphis fabae that contained the bacteria (symbiotic aphids) and larvae experimentally deprived of the bacteri[...]article/chapitre/communication
K. Komaki ; H. Ishikawa | 1999Although Buchnera, the endosymbiotic bacteria of aphids, are close relatives of Escherichia coli, their genome size is only a seventh that of E. coli. In this study, we estimated the genomic copy number of Buchnera by dot-blot hybridization and [...]article/chapitre/communication
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A. Grenier ; C. Nardon ; Y. Rahbe | 1994article/chapitre/communication
G. Febvay ; G. Bonnot ; C. Malosse ; J. Einhorn | 1993