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Cuticular hydrocarbons correlated with reproductive status in a queenless ant
TLDR
It is discussed whether 9-C31 provides honest information about egg–laying ability, enabling ants to recognize the different classes of nest–mates involved in reproductive conflicts, and whether fertility cues could reliably underpin the antagonistic interactions occurring in insect societies. Expand
Sex, age and ovarian activity affect cuticular hydrocarbons in Diacamma ceylonense, a queenless ant.
TLDR
Variations in cuticular profile are a reliable reflection of ovarian activity, and could be used by ants as a fertility signal, and are discussed in the context of physiological models of the relation between ovarian activity and the synthesis of cuticular hydrocarbons. Expand
Numerous and Rapid Nonstochastic Modifications of Gene Products in Newly Synthesized Brassica napus Allotetraploids
TLDR
B. napus formation was correlated with immediate and directed nonadditive changes in gene expression, suggesting that the early steps of allopolyploidization repatterning are controlled by nonstochastic mechanisms. Expand
A Type IV Pilus Mediates DNA Binding during Natural Transformation in Streptococcus pneumoniae
TLDR
It is proposed that the transformation pilus is the primary DNA receptor on the bacterial cell during transformation in S. pneumoniae, a major Gram-positive human pathogen to acquire resistance to antibiotics and to escape vaccines through the binding and incorporation of new genetic material. Expand
Solid-Phase Microextraction and Cuticular Hydrocarbon Differences Related to Reproductive Activity in Queenless Ant Dinoponera quadriceps
TLDR
It is demonstrated that the alpha ant (virgin or mated) always had higher levels of 9-hentriacontene than her sterile nestmates, and this difference appears related to ovarian activity and may function as a signal of the alpha's dominance status. Expand
Biotransformation of the Insecticide Lindane by the White Rot Basidiomycete Phanerochaete chrysosporium
TLDR
Biotransformation of the insecticide lindane by the white rot basidiomycete Phanerochaete chrysosporium has been investigated in liquid cultures and 1-aminobenzotriazole (a P450 inactivator) drastically reduced pesticide metabolism. Expand
Host-Plant Specialization in Pheromone Strains of the European Corn Borer Ostrinia nubilalis in France
TLDR
Investigation of sex pheromone composition as a possible trait linked to the host plant showed that maize, mugwort, and hop host races of O. nubilalis differ not only in their host plant but also in the sex peromone they use. Expand
Fertility signalling and reproductive skew in queenless ants
TLDR
The fertility signal in queenless ants is compared with the ‘badge of status’ reported in various birds and the evolutionary stability of this communication system is discussed and given special emphasis to ecological constraints and the high degree of intracolonial relatedness typical of social insects. Expand
Posttranslational Modification of Pili upon Cell Contact Triggers N. meningitidis Dissemination
TLDR
It is found that proliferation of N. meningitidis in contact with host cells increased the transcription of a bacterial gene encoding a transferase that adds phosphoglycerol onto type IV pili, which allowed propagation of the bacterium to new colonization sites and also migration across the epithelium, a prerequisite for dissemination and invasive disease. Expand
Alternative Neisseria spp. type IV pilin glycosylation with a glyceramido acetamido trideoxyhexose residue
TLDR
A previously undiscovered monosaccharide involved in posttranslational modification of type IV pilin subunits by a MS-based approach is reported and the molecular basis of its biosynthesis is determined. Expand
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