What is the cause of excurrent habit in Pinus | vedclass

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Question

(B) The excurrent habit in $Pinus$ refers to the conical shape of the tree,where the main stem grows continuously and the lateral branches are shorter

Vedclass · Accepted Answer

Presence of apical dominance

Vedclass · Answer

(B) The excurrent habit in $Pinus$ refers to the conical shape of the tree,where the main stem grows continuously and the lateral branches are shorter,giving the tree a pyramidal appearance.This growth pattern is primarily controlled by apical dominance,a phenomenon where the terminal bud (apical bud) suppresses the growth of lateral buds due to the high concentration of the hormone auxin produced at the apex.Therefore,the presence of apical dominance is the direct cause of the excurrent habit in $Pinus$.

What is the cause of excurrent habit in Pinus?

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