Table 2.

Elicitors on the depending upon origin.

Exogenous elicitors	Endogenous elicitors
1. Formed around outer membrane of the cell	1. Induced by biotic or abiotic signals that are formed within the cell via secondary reactions
2. Chitosan, Glucans, glucomannose as polysaccharides	2. Hepta-beta-glucosides
3. Polyamines, Glycoproteins as polycations	3. Oligomers such as Alginate.
4. Cellulase, polygalacturonase, etc. as cellular enzymes:
5. Arachidonic acid, Eicosapentnoic acid as fatty acids: