Question

The cambial activity is maximum in _______ and minimum in _________ season respectively.

• A. winter, summer
• B. spring, winter
• C. autumn, spring
• D. winter, autumn

Answer 1

The correct option is B spring, winter

Cambium shows seasonal activity. Cambium ceases its activity with the onset of unfavourable conditions, usually in the autumn season and becomes minimum in the winter season. The xylary elements formed during this period are fewer, the vessels produced have a narrow lumen. The wood formed during this season is called autumn wood or latewood.
In spring, the cambium again becomes active. It produces a large number of xylary elements, vessels with a wider lumen, etc. The wood formed during this season is called springwood or earlywood.