Home Forum Dictionary Articles Tutorials Books Directory Share your work


Edit page | Page history | Printable version

Dictionary » S » Secondary xylem

Secondary xylem

Definition

noun

The xylem formed as a result of secondary growth from vascular cambium.


Supplement

Secondary xylem is absent in non-woody plants and is present in trees and shrubs. Its cell walls are thickened by deposition of lignin, thereby, rendering mechanical support to such plants. Secondary xylem consists of large sized tracheids and vessels.


Compare: primary xylem


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Secondary walls in tracheary elements

I hope somebody can help me out here. I understand that secondary walls are laid in xylem tissue in one of the following ways: annular thickenings, helical thickenings, scariform thickenings, ...

See entire post
by botanygirl
Mon Nov 10, 2008 7:50 pm
 
Forum: Botany Discussion
Topic: Secondary walls in tracheary elements
Replies: 0
Views: 741

need an answer

... several cell layers deep. Whereas the vascular cambium produces both secondary xylem(sapwood/heartwood) and secondary phloem(inner bark). Hope this helps :)

See entire post
by botanygirl
Thu Oct 25, 2007 2:47 pm
 
Forum: Botany Discussion
Topic: need an answer
Replies: 5
Views: 1283

URGENT!!! Please Help!

... following: spirulina, unicellular green alga, paramecium, amoeba wood (secondary xylem). I have messed it up. Now need to submit a report tomorrow and need approximate cell ...

See entire post
by elenah78
Mon Oct 02, 2006 9:23 pm
 
Forum: Evolution
Topic: URGENT!!! Please Help!
Replies: 0
Views: 802

xylem

During the early secondary growth, many pith cells are crushed, as a consequence both of movement of the vine and of inward pressure of developing xylem tissue. The xylem then shows several growth layers. As the individual wedges of vascular tissues ...

See entire post
by Dr.Stein
Tue Jan 31, 2006 10:39 am
 
Forum: Botany Discussion
Topic: xylem
Replies: 7
Views: 915

xylem

The xylem does not carry only water, it carries mineral ions and about 1% organic substances. ... check any serious botany book, even a high-school textbook you will see that the xylem's secondary function is supporting the plant. The phloem carries a solution of mostly organic ...

See entire post
by MrMistery
Sun Jun 26, 2005 7:25 pm
 
Forum: Botany Discussion
Topic: xylem
Replies: 11
Views: 5347
View all matching forum results

This page was last modified 10:02, 16 March 2009. This page has been accessed 149 times. 
What links here | Related changes | Permanent link