Question

With reference to secondary growth,explain how spring wood and autumn woods are formed?

Answer 1

Answer:

Hey here u go

Explanation:

ANSWER

In large trees the seasonal fluctuation will affect the growth of secondary xylem. Two types of wood formation occur during the spring season and the summer season, they are called as the spring wood and the summer wood respectively.

The xylem formed during the spring season contains numerous large vessels with wider lumen and possess less amount fibres. So, it acquires a greater radial width than the summer wood. The xylem formed during the summer and autumn season is very less amount since the activity of the cambium is highly reduced. The vessels are thick walled with narrow lumen and the summer woods possess mainly fibres and narrow vessels. Spring wood is produced in more amount than autumn wood.