Qulles are the trees that reduce the number of pathogenic bacteria? what are their names? how to recognize them? where are they? the mechanism of reduction of bacteria? etc.
Mainly American elm (Ulnus americana), Oak, Acer sp., Morcus alba, Platanus sp., Quercus sp.etc. are known to reduce number of pathogenic bacteria like mycobacteria, pseudomonas, clostridium and some bacillus species. The mechanisms are mainly by secreting antibiotics, endotoxin and forming iron siderophore complex besides many others.
Many. If you search review articles/ research articles for plants with antimicrobial activity, you will get names of plenty of plants showing in vitro antimicrobial activity by their solvent extracts.