File:Monocot Root Acorus (35399384203).jpg
![File:Monocot Root Acorus (35399384203).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Monocot_Root_Acorus_%2835399384203%29.jpg/800px-Monocot_Root_Acorus_%2835399384203%29.jpg?20191005194049)
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Summary
[edit]DescriptionMonocot Root Acorus (35399384203).jpg |
cross section: Acorus root common name: Sweet Flag magnification: 100x <a href="http://blogs.berkshirecc.edu/bccoer" rel="nofollow">Berkshire Community College Bioscience Image Library</a> The single layered epidermis lacks any significant cuticle. Root hairs appear as unicellular extensions of epidermal cells. The cortex is well-developed and divided into two zones; an outer narrow layer of closely packed smaller parenchyma cells and a wide inner layer of open larger aerenchyma cells. The inmost area of the cortex is bounded by an endodermis or starch sheath with larger barrel shaped cells and thickened walls that mark the casparian strip. Within the endodermis occasional small passage cells serve to transport water into the stele or vascular bundle. The stele is bound in a pericycle of single layered thin walled parenchyma cells. A single central vascular bundle contains radiating arms of xylem and phloem. The xylem is exarch: meaning the earlier smaller protoxylem is found towards the periphery and younger larger metaxylem to the center of the stem. Phloem tissues of sieve tubes, companion cells and phloem parenchyma are also exarch. The older protophloem is found towards the periphery and metaphloem towards the center of the stem. Supportive sclerenchyma tissues and phloem caps are notably absent in most monocot stems. Vascular cambium is also absent, preventing secondary growth of the root. The central region of the stele is occupied by thin walled starch containing aerenchyma cells. |
Date | |
Source | Monocot Root: Acorus |
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@N03/35399384203 (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 | 19:40, 5 October 2019 | ![]() | 3,264 × 1,840 (6.54 MB) | Netha Hussain (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Date and time of data generation | 20:44, 24 July 2017 |
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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 | 13:21, 27 July 2017 |
Y and C positioning | Centered |
Exif version | 2.3 |
Date and time of digitizing | 20:44, 24 July 2017 |
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DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |
Supported Flashpix version | 1 |
Color space | sRGB |