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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What is the name of a growth that blocks the xylem?
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Callose
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Lignin
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Tylose
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None of the above
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Explanation:
Detailed explanation-1: -These are tracheal plugs found in heart wood, due to which the heart wood becomes non-functional. These are balloon-like swellings of xylem parenchyma cells in the lumen of vessels.
Detailed explanation-2: -Tyloses are found in Secondary xylem. Tyloses are an outgrowth structure on parenchyma cells of secondary xylem vessels. The function of these cells is seen when there are unfavorable conditions like drought or plant or vascular bundles that are affected by some infection.
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