TREE DISEASES AND PESTS
COMMON TREE DISEASES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Addition of lignin to cell walls is an example of what type of defence?
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Physical
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Passive Chemical
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Active Chemical
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None of the above
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Explanation:
Detailed explanation-1: -As a major component of plant secondary cell walls, lignin provides structural integrity and rigidity, and contributes to primary defense by providing a physical barrier to pathogen ingress.
Detailed explanation-2: -Lignin is one of the main components of plant cell wall and it is a natural phenolic polymer with high molecular weight, complex composition and structure.
Detailed explanation-3: -The cell wall represents a first line of defense for plant cells against infection by microbial pathogens.
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