It varies from plant to plant. for example if u take tulasi leaves are effective or of u tale turmeric the root is having the anti bacterial properties. u should be more specific in selecting the parts of plants that contain the bio active compounds.

Yes thousands of plant products are sold by many companies as crude product. Leaves, stems, flowers and roots of plants are avaialable in the market for example Tulsi, Dhak, Aloe vera, Hibiscus, Phyllanthus, cucarbit seeds, bark of mango, Terminalia, Tej pat, Jamun, Cassia fistula, Ficus species, spices and condiments.  

Thank you. These are the crude plants sold as food additives. And what about the drugs produced by pharmacologies which must undergo the clinical tests? I would like to find some names of phytopharmaceuticals containing active sunstances from plant.

Numerous  plant metabolite preparations are being produced by pharmacologies as drugs, especially most of the ayurvedic medicines. If you needed the names,the main brands which sell these products in the indian market are Kottakkal arya vaidyasala, Vaidya ratnam, Nagarjuna etc.... please see the links below, which may help you....

http://www.vaidyaratnammooss.com/

http://www.keralaayurvedamedicine.com/

http://aryavaidyasala.com/%28S%28gsmcb2mg4rkaseziwjliw245%29%29/avs_medicines.aspx

Preparations containing bererine hydrochloride, andrographolide, and so on, as effective constituents.

Thank you a lot for all the answers!!  

Many plants extracts show antimicrobial activity, therefore it is difficult to name a plant

Dear Jitka

I hope that attached papers will satisfy your query.

Thank you for your helpful suggestions!