in regard to aggregate constitution. The several types of recurrent mutants known to involve change of configuration (such as half-mutants and mass-mutants) correspond with these in frequency of origin and in gametic constitution. The fact that the crossing over which yields them is rare is not surprising since crossing over is regularly found to be reduced in structural heterozygotes in Drosop...

Three adult patients, two of whom were brothers and the third their uncle, were brought to my dispensary. They said that they had taken together some home-made sattu (flour of fried wheat and gram made into paste with sugar) in the morning, and since then were feeling very dizzy. They had come to the dispensary within one hour after their breakfast of sattu. Although no foul play was suspected,...

Theory predicts patterns of defense across taxa based on notions of tradeoffs and synergism among defensive traits when plants and herbivores coevolve. Because the expression of characters changes ontogenetically, the evolution of plant strategies may be best understood by considering multiple traits along a trajectory of plant development. Here we addressed the ontogenetic expression of chemic...

Author details Faculty of Agriculture, Laboratory of Agronomy, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece. Faculty of Agriculture, Laboratory of Genetics and Plant Breeding, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece. Biological Sciences, Syngenta, Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY, UK. ELGO-“Demetra”, Agric...

in journal: 1, László I., Szoke É. and Tyihák E. (1998) Effect of Magnesium on the Methylation of Alkaloids in Datura innoxia Mill. Tissue Cultures. Magnesium Research, 11, 236-237.

The lectin from Datura stramonium can be inhibited by oligomers of N-acetylglucosamine. This property was exploited to purify the lectin by affinity chromatography on Sepharosefetuin. The purified lectin is a glycoprotein in having subunits of 40 000 and 45 000 mol.wt.

For animals to execute odor-driven behaviors, the olfactory system must process complex odor signals and maintain stimulus identity in the face of constantly changing odor intensities [1-5]. Surprisingly, how the olfactory system maintains identity of complex odors is unclear [6-10]. We took advantage of the plant-pollinator relationship between the Sacred Datura (Datura wrightii) and the moth ...

partaken of a quantity of datura leaves, prepared in the form of curry, with rice, which he afterwards acknowledged to have voluntarily taken. On admission, he lay perfectly unconscious, with severe spasmodic muscular twitchings and stertorous breathing. Skin cool; pulse about 108?, feeble. Pupils dilated and insensible to the effects of light. The stomach pump was immediately introduced, but d...

BACKGROUND Combinations of floral traits - which operate as attractive signals to pollinators - act on multiple sensory modalities. For Manduca sexta hawkmoths, how learning modifies foraging decisions in response to those traits remains untested, and the contribution of visual and olfactory floral displays on behavior remains unclear. METHODOLOGY/PRINCIPAL FINDINGS Using M. sexta and the flo...