Host Defense

Plants have inherent defensive mechanism which protects them from their predators and phytopathogens. Their inability to move is largely complemented by the defensive adaptations which help the plants to survive and reproduce successfully. One of the most important defensive mechanisms is production of secondary metabolites. These metabolites are the chemical substances which are not involved in the normal photosynthetic process of the plants. They are alternatively known as allelochemicals and they can influence the behavior, growth, or survival of herbivores. Allelochemicals act as toxins to herbivores and in some cases also reduce the digestibility of plant cell wall.

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