File:Gymnosperm Stem Circular Bordered Pits in Pinus Wood (36484401545).jpg
Original file (3,264 × 1,840 pixels, file size: 4.38 MB, MIME type: image/jpeg)
Captions
Summary
editDescriptionGymnosperm Stem Circular Bordered Pits in Pinus Wood (36484401545).jpg |
tangential section: Pinus stem magnification: 400x iron-alum hematoxylin and safranin stain Gymnosperms like Pinus rely entirely on tracheids for water flow and mechanical support. True xylem vessels and wood parenchyma are lacking. While fibers are generally absent older stems may contain some fiber tracheids. The uniform wood of Pinus consists almost entirely of longitudinally oriented bands of narrow, pale staining tracheids interrupted by short bands of horizontally oriented xylem rays. Xylem rays, usually one cell thick and a few cells high, are composed of clear, thin walled parenchyma cells. The lumen of many tracheids is crossed by branched trabeculae. Tracheid side walls contain large circular bordered pits that function to move water from tracheid to tracheid while preventing air flow from embolized tracheids. The membrane of each bordered pit is marked by a pale, thin, porous outer margo and a thicker, darker, inner torus. |
Date | |
Source | Gymnosperm Stem: Circular Bordered Pits in Pinus Wood |
Author | Berkshire Community College Bioscience Image Library |
Licensing
editThis file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
This image was originally posted to Flickr by bccoer at https://flickr.com/photos/146824358@N03/36484401545 (archive). It was reviewed on 22 June 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-zero. |
22 June 2018
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 23:55, 22 June 2018 | 3,264 × 1,840 (4.38 MB) | Meisam (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on en.wikipedia.org
- Usage on ja.wikipedia.org
- Usage on zh.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Date and time of data generation | 11:00, 10 February 2014 |
---|---|
Horizontal resolution | 1 dpc |
Vertical resolution | 1 dpc |
Software used | Windows Photo Editor 10.0.10011.16384 |
File change date and time | 12:38, 10 August 2017 |
Y and C positioning | Centered |
Exif version | 2.3 |
Date and time of digitizing | 11:00, 10 February 2014 |
Meaning of each component |
|
DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |
Supported Flashpix version | 1 |
Color space | sRGB |