File:Angiosperm Morphology Midrib Sclerenchyma in Ligustrum (36198196584).jpg

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cross section: Ligustrum leaf magnification:400x

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.
Date
Source Angiosperm Morphology: Midrib Sclerenchyma in Ligustrum
Author Berkshire Community College Bioscience Image Library

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Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
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This image was originally posted to Flickr by bccoer at https://flickr.com/photos/146824358@N03/36198196584 (archive). It was reviewed on 23 June 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-zero.

23 June 2018

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current00:13, 23 June 2018Thumbnail for version as of 00:13, 23 June 20183,264 × 1,840 (1.28 MB)Meisam (talk | contribs)Transferred from Flickr via #flickr2commons

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