Search results for "opaline"

Involvement of the Pseudomonas aeruginosa MexAB–OprM efflux pump in the secretion of the metallophore pseudopaline

2020

ABSTRACTThe ability for all organisms to acquire metals from their environment is essential for life. To overcome the metal restriction imposed by the host’s nutritional immunity, bacterial pathogens exploits the use of small high metal affinity molecules called metallophores. Metallophores are first synthetized in the cytoplasm, then secreted into the medium where they sequester the metal. The metal-metallophore complex is then imported into the bacterium following binding to dedicated cell surface receptors. Recently, a new family of metallophores has been discovered in pathogenic bacteria called staphylopine in Staphylococcus aureus and pseudopaline in Pseudomonas aeruginosa. Here, we ar…

Quand et comment se forment les préférences alimentaires chez l'enfant ? Résultats de l'étude OPALINE

2015

Manger est essentiel pour la survie, et nous naissons bien équipés pour absorber des nutriments. Cependant, tous les autres aspects du comportement alimentaire sont appris, essentiellement durant les premières années de vie [1]. De plus, les habitudes acquises pendant l'enfance contribueront en grande partie au développement des habitudes alimentaires futures [2,3,4]. Ainsi, il est fondamental de comprendre quand et comment s'acquièrent les habitudes alimentaires favorables à la santé. Cette présentation soulignera certains facteurs qui favorisent ou modulent les préférences alimentaires, comme l'allaitement au sein préalable, les expositions répétées à un aliment, l'introduction d'une vari…

OPALINE: Observatory of food preferences in infants and children

2010

Plant hormones and Agrobacterium tumefaciens strain 82.139 induce efficient plant regeneration in the cardenolide-producing plant Digitalis minor

2002

Summary Shoot formation in explants of Digitalis minor was achieved, through axillary bud proliferation and adventitious bud differentiation, by varying the amount and source of plant hormones. Shoot regeneration was also obtained after infection of D. minor with the wild-type Agrobacterium tumefaciens strain 82.139, which induced shooty tumours. These shoots were not transgenic, as revealed by nopaline assays and the use of a C58pMP90/T139GUS-INT strain harbouring the intron inactivated gusA gene. Plants were easily rooted and transplanted into the greenhouse. Shoot cultures of D. minor accumulated up to 226 μg cardenolides per g dry mass when cultured on agar-solidified medium. Cardenolid…