Udita Tiwari

Schwermetalle kommen in der Natur als seltene Elemente in B den vor. Schwermetalle wie Cu und Zn sind f r das normale Wachstum und die Entwicklung von Pflanzen unerl sslich, da sie Bestandteil vieler Enzyme und anderer Proteine sind. Erh hte Konzentrationen von essentiellen und nicht essentiellen Schwermetallen im Boden k nnen jedoch zu Toxizit tssymptomen und Wachstumshemmung f hren. Die Anwesenheit von Schwermetallen kann die Enzymaktivit t in Pflanzen und auch im Menschen beeinflussen.

I metalli pesanti sono presenti naturalmente nel suolo come elementi rari. I metalli pesanti, come il Cu e lo Zn, sono essenziali per la normale crescita e lo sviluppo delle piante, poich costituiscono molti enzimi e altre proteine. Tuttavia, concentrazioni elevate di metalli pesanti, sia essenziali sia non essenziali, nel suolo possono provocare sintomi di tossicit e inibizione della crescita. La presenza di metalli pesanti pu influire sull'attivit enzimatica delle piante e dell'uomo.

Os metais pesados ocorrem naturalmente nos solos como elementos raros. Os metais pesados, como o Cu e o Zn, s o essenciais para o crescimento e desenvolvimento normais das plantas, uma vez que s o constituintes de muitas enzimas e outras prote nas. No entanto, concentra es elevadas de metais pesados essenciais e n o essenciais no solo podem provocar sintomas de toxicidade e inibi o do crescimento. A presen a de metais pesados pode afetar a atividade enzim tica nas plantas e tamb m no ser humano.

Negative effects and resistance of available antibiotics are increasing day by day. Due to toxicity of drugs and constant development of bacterial resistance motivates researchers to search new antimicrobial agents and give much attention towards the exploration of natural antioxidants. Plants produce a wide range of secondary metabolites with active antioxidative activities with therapeutic potential. Different parts of plants such as root, leaves, stem etc are rich in bioactive compounds which have natural antioxidant and antimicrobial activity. New chemotherapeutic agents may be developed from plants products replacing the available synthetic drugs as plants are the potential sources of secondary metabolites. The antimicrobial activity of different plant leaves was demonstrated in the study which indicates that there is possibility of extracting alternative antibiotic substances from these plants for the development of newer antibacterial agents. Although this study provides scientific understanding but also envisaged the need to further investigate other pharmacological properties along with equal potential as antibiotics.