Describe the anatomical structure of Pinus stem
Answers
Explanation:
Anatomy of Young Stem of Pinus:
It resembles the anatomy of dicotyledonous stem in many respects. The general arrangement of the various tissues from the circumference to the centre is the same. However, it differs, from the dicot stem in having a large number of resin ducts filled with resin. These ducts are found to be distributed almost throughout the stem.
The epidermis has an irregular outline. Endodermis and pericycle are like those of the dicotyledonous stem, but the pericycle contains no sclerenchyma. The vascular bundles are not wedge-shaped, as in the dicotyledons. Phloem consists of annular and spiral tracheids which are irregularly disposed towards the centre.
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Anatomy of Young Stem of Pinus:
It resembles the anatomy of dicotyledonous stem in many respects. The general arrangement of the various tissues from the circumference to the centre is the same. However, it differs, from the dicot stem in having a large number of resin ducts filled with resin. These ducts are found to be distributed almost throughout the stem.
The epidermis has an irregular outline. Endodermis and pericycle are like those of the dicotyledonous stem, but the pericycle contains no sclerenchyma. The vascular bundles are not wedge-shaped, as in the dicotyledons. Phloem consists of annular and spiral tracheids which are irregularly disposed towards the centre.
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