Microbial diversity and secondary metabolism potential in relation to dark alterations in Paleolithic Lascaux Cave.

Tourism in Paleolithic caves can cause an imbalance in cave microbiota and lead to cave wall alterations, such as dark zones. However, the mechanisms driving dark zone formation remain unclear. Using shotgun metagenomics in Lascaux Cave's Apse and Passage across two years, we tested metabarcoding-derived functional hypotheses regarding microbial diversity and metabolic potential in dark zones vs unmarked surfaces nearby.

Pseudomonas produce various metabolites displaying herbicide activity against broomrape.

Pseudomonads are well-known for their plant growth-promoting properties and biocontrol capabilities against microbial pathogens. Recently, their potential to protect crops from parasitic plants has garnered attention. This study investigates the potential of different Pseudomonas strains to inhibit broomrape growth and to protect host plants against weed infestation.

The scent of roses, a bouquet of fragrance diversity.

Roses have been domesticated since antiquity for their therapeutic, cosmetic, and ornamental properties. Their floral fragrance has great economic value, which has influenced the production of rose varieties. The production of rose water and essential oil is one of the most lucrative activities, supplying bioactive molecules to the cosmetic, pharmaceutical, and therapeutic industries.

Evaluation of a training program for emergency medical service physician dispatchers to reduce emergency departments visits.

Background: Emergency Departments (ED) have seen an increasing number of older patients who are mostly referred following a call to the Emergency Medical Services (EMS). Long waiting times in settings, which are not designed to meet older patients' needs, may increase the risk of hospital-acquired complications. Unnecessary visits should therefore be avoided as much as possible.

Wheat Metabolite Interferences on Fluorescent Physiology Modify Wheat Metabolome through an Ecological Feedback.

Plant roots exude a wide variety of secondary metabolites able to attract and/or control a large diversity of microbial species. In return, among the root microbiota, some bacteria can promote plant development. Among these, are known to produce a wide diversity of secondary metabolites that could have biological activity on the host plant and other soil microorganisms.