What are the key defense mechanisms of plants?

Asked on 15.12.2018 in All Questions.
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Some key defense mechanisms include a direct response to specific antimicrobial activities, metabolite biosynthesis, callose deposition, transcription of response genes, stomatal closure and programmed plant cell death signaling. Previous workers have elucidated the roles of phytochemicals (chiefly secondary plant metabolites) in protecting plants against pathogens and pests. In the case of brassica crops, they either produce phytochemicals as a component of their growth and development (i.e., inbuilt chemical barriers; structural barriers such as lignin, and pre-formed...
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