Populations of widely distributed ectotherms demonstrate different cold resistance corresponding to the local climate. However, efficiently thermoregulating ectotherms could avoid divergence in cold resistance. Two species of ants, previously shown to even out latitudinal differences of mean summer temperatures in their nests, were used to test this hypothesis by comparing the temperature depen...

Melicope balgooyi, a new species of Melicope (Rutaceae) is described. It is known only from the Austral Islands in the South Pacific (French Polynesia). However, it is not closely related to the other two species previously known from the Austral Islands, which are part of Melicope section Vitiflorae. The new species belongs to Melicope section Melicope and is most closely related to species fr...

Generalized mutualisms are often predicted to be resilient to changes in partner identity. Variation in mutualism-related traits between native and invasive species however, can exacerbate the spread of invasive species ('invasional meltdown') if invasive partners strongly interact. Here we show how invasion by a seed-dispersing ant (Myrmica rubra) promotes recruitment of a co-introduced invasi...

Thermoactinospora rubra YIM 77501T is an aerobic, Gram-positive, spore-forming and cellulose degrading thermophilic actinomycete isolated from a sandy soil sample of a volcano. Its growth temperature range is 28-60°C. The genomic sequence of this strain revealed that there are 27 cellulase genes belonging to six glycoside hydrolase families. To understand the strategy that this strain uses to u...

Le pityriasis rubra pilaire est un trouble de kératinisation rare dont l’étiopathogénie reste inconnue mais dont l’association avec autres pathologies a été déjà rapportée. Nous rapportons l’observation d’une jeune patiente qui présente un pityriasis rubra pilaire associé à une myasthénie. Traitée par Néostigmine et thymectomie avec bonne évolution sur le plan neurologique. Vu son désir de gros...

The methanol extract of the bark of Ahus rubra showed antimicrobial activity against Gram-positive and Gramnegative bacteria. Diarylheptanoid and its glycoside (oregonin) were identijied as the two constituents responsible for this activity.