File:Vascular Bundles in Zea (34837901016).jpg
![File:Vascular Bundles in Zea (34837901016).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/5/56/Vascular_Bundles_in_Zea_%2834837901016%29.jpg/800px-Vascular_Bundles_in_Zea_%2834837901016%29.jpg?20191005193717)
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[edit]DescriptionVascular Bundles in Zea (34837901016).jpg |
cross section; Zea stem magnification: 100x <a href="http://blogs.berkshirecc.edu/bccoer" rel="nofollow">Berkshire Community College Bioscience Image Library</a> A single layered, cutinized epidermis overlies an interior composed entirely of cortical tissues. Within the cortex a few layers of sclerenchyma can be seen just beneath the epidermis. Below that lies a cortical region composed entirely of loosely packed thin walled parenchyma and intercellular spaces. There is no apparent stele, rather the vascular bundles are scattered throughout the cortex with numerous small bundles crowded nearly the periphery of the stem and fewer larger bundles towards the center of the stem. The vascular bundles are closed and collateral. Xylem is oriented towards the center of the stem and small amounts phloem to the outside. Cambium is lacking preventing secondary growth. In mature vascular bundles, the earliest protoxylem may break down to produce a large protoxylem cavity. The vascular bundles are wrapped in a bundle sheath of thick walled supportive sclerenchyma cells. Unlike most grasses Zea stems are not hollow at the center. |
Date | |
Source | Vascular Bundles in Zea |
Author | Berkshire Community College Bioscience Image Library |
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This image was originally posted to Flickr by bccoer at https://flickr.com/photos/146824358@N03/34837901016 (archive). It was reviewed on 5 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-zero. |
5 October 2019
Files from Berkshire Community College Bioscience Image Library Flickr stream uploaded by Netha Hussain
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current | 19:37, 5 October 2019 | ![]() | 3,264 × 1,840 (3.26 MB) | Netha Hussain (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Date and time of data generation | 11:00, 10 February 2014 |
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Horizontal resolution | 1 dpc |
Vertical resolution | 1 dpc |
Software used | Windows Photo Editor 10.0.10011.16384 |
File change date and time | 20:51, 24 May 2017 |
Y and C positioning | Centered |
Exif version | 2.3 |
Date and time of digitizing | 11:00, 10 February 2014 |
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Supported Flashpix version | 1 |
Color space | sRGB |