Piper nigrum Leaf and Stem Assisted Green Synthesis of Silver Nanoparticles and Evaluation of Its Antibacterial Activity Against Agricultural Plant Pathogens

Table 1

Biochemical analysis of bacteria isolated from disease infected agricultural plant leaf.

S. no.	Biochemical tests	Citrobacter freundii	Erwinia cacticida
1	Gram staining	Gram negative Rod	Gram negative rods
2	Agar slant	Small white rounded,; waxy colonies	Translucent ivory; and convex with; entire margins
3	Spore staining	Negative	Negative
4	Indole	Negative	Positive
5	Methyl red	Positive	Negative
6	Voges Proskauer	Negative	Positive
7	Citrate utilization	Positive	Positive
8	Starch hydrolysis	Negative	Negative
9	Oxidase	Negative	Negative
10	Catalase	Positive	Positive
11	Urease activity	Variable	Negative
12	Triple sugar iron; agar test	Acid and H2S; production	Acid production
13	H2S production	Positive	Negative