Isolation of Bacterial Endophytes Associated with Cinchona ledgeriana Moens. and Their Potential in Plant-growth Promotion, Antifungal and Quinoline Alkaloids Production.

For centuries, quinoline alkaloids from the tree bark of Cinchona ledgeriana (C. ledgeriana) have been used in the treatment of malaria. However, unsustainable harvesting and poor growth conditions greatly limit its use as raw materials.

Bioactive Metabolites Produced by Cyanobacteria for Growth Adaptation and Their Pharmacological Properties.

Cyanobacteria are the most abundant oxygenic photosynthetic organisms inhabiting various ecosystems on earth. As with all other photosynthetic organisms, cyanobacteria release oxygen as a byproduct during photosynthesis. In fact, some cyanobacterial species are involved in the global nitrogen cycles by fixing atmospheric nitrogen.

Circadian oscillations of cytosolic free calcium regulate the Arabidopsis circadian clock.

In the last decade, the view of circadian oscillators has expanded from transcriptional feedback to incorporate post-transcriptional, post-translational, metabolic processes and ionic signalling. In plants and animals, there are circadian oscillations in the concentration of cytosolic free Ca ([Ca]), though their purpose has not been fully characterized. We investigated whether circadian oscillations of [Ca] regulate the circadian oscillator of Arabidopsis thaliana.

Effects of single and co-immobilization on the product specificity of type I pullulanase from Anoxybacillus sp. SK3-4.

Type I pullulanase from Anoxybacillus sp. SK3-4 (PulASK) is an unusual debranching enzyme that specifically hydrolyzes starch α-1,6 linkages at long branches producing oligosaccharides (≥G8), but is nonreactive against short branches; thus, incapable of producing reducing sugars (G1-G7). We report on the effects of both single and co-immobilization of PulASK on product specificity.