Question 22 of 40
Q.Write the differences between Diffuse Porous Wood and Ring Porous Wood.
Puducherry TnboardTamil Nadu HSC First Year (DGE) Board 2019Subjective· 3mImportance★★★★★
55% · 22/40 Questions
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Start your 14-day free trial to unlock the full solution →Diffuse porous wood has evenly sized, evenly scattered vessels throughout the growth ring; ring porous wood has large early-wood vessels and small late-wood vessels, forming a visibly marked ring.
When secondary xylem (wood) is examined in transverse section, trees can be classified based on how the vessels (pores) are distributed within each annual growth ring:
| Feature | Diffuse Porous Wood | Ring Porous Wood |
|---|---|---|
| Vessel size | Roughly uniform in size throughout the growth ring | Distinctly larger in early (spring) wood, much smaller in late (summer/autumn) wood |
| Vessel distribution | Evenly scattered (diffused) across the entire growth ring, with no sharp size transition | Sharply differentiated: a ring of large pores at the start of the season's growth, followed by smaller pores |
| Growth ring visibility | Growth ring boundaries are less sharply defined based on vessel size alone | Growth rings are very distinctly visible because of the abrupt change in vessel size |
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