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BIO 206 PLANT MORPHOLOGY

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BIO 206

PLANT MORPHOLOGY

LECTURE NOTES 5th WEEK

DR. AYDAN ACAR ŞAHİN

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Angiosperm Stem

Angiosperm wood

1. Wood is complex and heterogenous.

2. Vessels are seen in plenty (Trachea (vessel members)+tracheids+ fibre-tracheids, libriform fibre and wood-parenchyma. ).

3. It is porous in nature and is called hard wood.

4. More amount of axial parenchyma is seen in varied distribution.

5. Resin ducts are absent. However, gum ducts are present.

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Late wood Early wood

Sclerenchyma Dilated floem ray

Periderm

Secondary xylem

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Dilated floem ray

Cambium

Trachea Sieve tube cell

Sclerenchyma

Tracheid

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