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Dictionary » H » Heartwood

Heartwood

Definition

noun

The central wood in a branch or stem characterized by being composed of dead cells, more resistant to decay, generally darker and harder than the outer wood.


Supplement

The heartwood in comparison with sapwood is darker and harder as a result of the deposition of chemical substances such as gums, tannins, or pigments that may impart such colour. Because of that the heartwood is primarily important to plants for structural support.


Compare: sapwood


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Transport In Plants

... consists of sieve cells , sieve tube elements , phloem parenchyma and phloem fibres. There are also phloem ray cells. Xylem consists of the inner heartwood (the dead part) and the outer portion called the sapwood (the mostly living part.) Xylem "wood" from the Greek xylon. The actual ...

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by kika
Tue Aug 02, 2011 10:40 am
 
Forum: Botany Discussion
Topic: Transport In Plants
Replies: 3
Views: 7276

need an answer

... side (the outer layer of a tree's bark) which is only several cell layers deep. Whereas the vascular cambium produces both secondary xylem(sapwood/heartwood) and secondary phloem(inner bark). Hope this helps :)

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by botanygirl
Thu Oct 25, 2007 2:47 pm
 
Forum: Botany Discussion
Topic: need an answer
Replies: 5
Views: 4198

?¿? Woody Dicot Question ?¿?

The center is called heartwood. And from the center to the periphery lie the rays that is responsible for secretion into the heartwood.

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by wtwt5237
Tue Jun 12, 2007 1:15 pm
 
Forum: Botany Discussion
Topic: ?¿? Woody Dicot Question ?¿?
Replies: 3
Views: 2524


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