transcriptional regulation of nuclear genes controlling plastid differentiation in tomato

ABSTRACTSeveral mechanisms which control transcription of genes encoding plastidial proteins in tomato are overviewed: light, the circadian clock, photooxidative stress and tissue-specific factors. Protein factors binding promoters of genes responding to such stimuli are described, as well as their abundance during the various phases of the light-dark cycle. Finally, the structure and regulation of a novel class of genes encoding plastidial enzymes, controlling carotenoid biosynthesis, are describe

Burkholderia cepacia complex species: health hazards and biotechnological potential

The Burkholderia cepacia complex is a group of nine closely related bacterial species that have useful properties in the natural environment as plant pest antagonists, plant growth promoters and degradative agents of toxic substances. Because these species are human opportunistic pathogens, especially in cystic fibrosis patients, biotechnological applications that involve environmental releases have been severely restricted. Recent progress in understanding the taxonomy, epidemiology and ecology of the B. cepacia complex species has unravelled considerable variability in their pathogenicity and ecological properties, which has set the basis for a reassessment of the risk posed by individual species to human health