Angiosperm Morphology: Midrib Sclerenchyma in Ligustrum
cross section: Ligustrum leaf
magnification:400x
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The upper palisade mesophyll is composed of two compact layers of elongated photosynthetic parenchyma. A well developed lower spongy mesophyll is composed of loosely arranged photosynthetic parenchyma with abundant air spaces. The abaxial stomata open into large irregularly shaped substomatal chambers.
Midrib and blade vascular bundles are collateral with large thick-walled xylem vessels towards the adaxial surface and smaller sieve tubes and companion cells of phloem towards the abaxial leaf surface. Small masses of abaxial sclerenchyma and subepidermal collenchyma are particularly well developed below the midrib vein.
A largely parenchymatous ring of bundle sheath cells is visible around all vascular bundles.
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Angiosperm Morphology: Midrib Sclerenchyma in Ligustrum
cross section: Ligustrum leaf
magnification:400x
Visit the Berkshire Community College Bioscience Image Library
The upper palisade mesophyll is composed of two compact layers of elongated photosynthetic parenchyma. A well developed lower spongy mesophyll is composed of loosely arranged photosynthetic parenchyma with abundant air spaces. The abaxial stomata open into large irregularly shaped substomatal chambers.
Midrib and blade vascular bundles are collateral with large thick-walled xylem vessels towards the adaxial surface and smaller sieve tubes and companion cells of phloem towards the abaxial leaf surface. Small masses of abaxial sclerenchyma and subepidermal collenchyma are particularly well developed below the midrib vein.
A largely parenchymatous ring of bundle sheath cells is visible around all vascular bundles.
Technical Questions:bioimagesoer@gmail.com