A) toxin
B) phytoalexin
C) phytotoxin
D) hormone
Correct Answer: B
Solution :
Phytoalexins are non-toxic lipid like or phenolic compounds produced by plants in response to specific fungus, bacteria and even nematodes. Some pathogens are highly specific to phytoalexins, whereas others are resistant to phytoalexins which the pathogen induces because the pathogen inactivates them enzymatically. Toxin refers to poisonous microbial substance which able to induce host damage.
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