FORESTRY
GENERAL FORESTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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leaf separation from tree
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a tree bole scar
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root grafting to neighboring trees
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None of the above
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Detailed explanation-1: -Abscission means the act of cutting off. Abscission is a naturally occurring phenomenon which involves the separation of fruits, flowers or even leaves from plants at specialized separation layers. In other words, it is the normal shedding of a senescent plant structure or a part.
Detailed explanation-2: -In deciduous trees, an abscission zone, also called a separation zone, is formed at the base of the petiole. It is composed of a top layer that has cells with weak walls, and a bottom layer that expands in the autumn, breaking the weak walls of the cells in the top layer. This allows the leaf to be shed.
Detailed explanation-3: -In botany, abscission is the normal separation of a plant part or organ. It occurs to separate a plant part or organ that may no longer be necessary. For instance, leaf abscission is the normal shedding of an old leaf at the base of the petiole such as that occurs during autumn.