3 Biology -- Plant Anatomy

How is annual ring formed ?

How is annual ring formed ?

The plant that is present having various climatic condition shows different mode of activities cambium ring. If the season is spring the activity of cambium ring is more forming spring wood or early wood. And, if the climatic condition is not good i.e winter or autumn, the activity of cambium ring is less and form late wood. Because of which there forms different distinct ring with the addition of spring wood and autumn wood that is called annual ring. Each and every year one annual ring is added in the wood. By counting the number of annual rings, we can estimate the age of plant which is called dendrochronology. The annual ring formed is called porus wood. This type of wood is present only in those plants which are grown having different climatic condition.

   The plants which are grown having uniform condition throughout the year has no distinct annual ring but wood formed in such plant is called diffused porous wood.


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