Slika:Herbaceous Dicot Root Closed Vascular Bundle in Mature Ranunculus (35613584780).jpg

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Opis

cross section: Mature Ranunculus root common name: Buttercup magnification: 400x

<a href="http://blogs.berkshirecc.edu/bccoer" rel="noreferrer nofollow">Berkshire Community College Bioscience Image Library</a>

The cortex is well-developed and divided into two zones; a narrow outer layer of closely packed smaller parenchyma cells (exodermis) and a wide inner layer of larger open 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 red staining casparian strip. Within the endodermis occasional small passage cells serve to transport of water into the stele or vascular bundle.

The stele is bound on its outmost edge by is a pericycle of single layered thin walled parenchyma cells.

The closed vascular bundles are arranged radially with arms of exarch xylem interspaced with patches of phloem and parenchymous conjunctive tissue. These tissues may become sclerenchymous in older roots

Vascular cambium is also absent, preventing secondary growth of the root.
Datum
Vir Herbaceous Dicot Root: Closed Vascular Bundle in Mature Ranunculus
Avtor Berkshire Community College Bioscience Image Library

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Creative Commons CC-Zero Datoteka je na voljo pod licenco Creative Commons Univerzalna izročitev v javno domeno CC0 1.0
Oseba, ki je delo povezala s tem dovoljenjem, je dala svoje delo v javno domeno z opustitvijo vseh svojih pravic do dela po vsem svetu pod avtorskim pravom, vključno z vsemi povezanimi in sorodnimi pravicami, v obsegu, kot ga dopušča zakonodaja. Delo lahko kopirate, spreminjate, razširjate in izvajate, tudi v gospodarske namene, ne da bi morali zaprositi za dovoljenje.

To sliko je prvotno objavil bccoer na strani https://flickr.com/photos/146824358@N03/35613584780 v Flickru. 5. oktobra 2019 jo je pregledal robot FlickreviewR 2 in potrdil, da je bila tam na razpolago pod licenco cc-zero.

5. oktobra 2019

Files from Berkshire Community College Bioscience Image Library Flickr stream uploaded by Netha Hussain

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10. februar 2014

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trenutno21:41, 5. oktober 2019Sličica za različico z datumom 21:41, 5. oktober 20193.264 × 1.840 (1,25 MB)Netha HussainTransferred from Flickr via #flickr2commons

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