where is heart wood present in plant cambium?

Answer 1

Heart wood is NOT present in the Cambium .

The fact is , it is cambium that produces ALL the wood.

Heartwood is wood that, as a result of genetically programmed processes, has died and become resistant to decay.

It appears in a cross-section as a discolored circle, following annual rings in shape.

Heartwood is usually much darker than still living wood, and forms with age.

Many woody plants do not form heartwood, but other processes, such as decay, can discolor wood in similar ways, leading to confusion.

Some uncertainty still exists as to whether heartwood is truly dead, as it can still chemically react to decay organisms, but only once.

Sapwood is living wood in the growing tree. All wood in a tree is first formed as sapwood.

Its principal functions are to conduct water from the roots to the leaves and to store up and give back according to the season the food prepared in the leaves.

The more leaves a tree bears and the more vigorous its growth, the larger the volume of sapwood required.

Hence trees making rapid growth in the open have thicker sapwood for their size than trees of the same species growing in dense forests.

Sometimes trees grown in the open may become of considerable size, 30 cm or more in diameter, before any heartwood begins to form, for example, in second-growth hickory, or open-grown pines.

As a tree increases in age and diameter an inner portion of the sapwood becomes inactive and finally ceases to function, as the cells die.

This inert or dead portion is called heartwood. Its name derives solely from its position and not from any vital importance to the tree.

This is shown by the fact that a tree can thrive with its heart completely decayed.

Some species begin to form heartwood very early in life, so having only a thin layer of live sapwood, while in others the change comes slowly.

Thin sapwood is characteristic of such trees as chestnut, black locust, mulberry, osage-orange, and sassafras, while in maple, ash, hickory, hackberry, beech, and pine, thick sapwood is the rule.

DAMGE TO THE OUTER BARK AND THEN DAMAGE TO THE EXPOSED SAPWOOD IS A SURE WAY TO KILL A TREE . IN MANY COUNTRIES IT IS BEING DONE CLANDESTINELY FOR WOOD AND CAPTURE ADDITIONAL LAND . A SAD AFFAIR INDEED!!

Now click the links below to see both the types of wood -

1) http://www.treedictionary.com/DICT2003/IMAGES/sapwood%20oak-1.jpg

2) http://www.visualsunlimited.com/images/watermarked/210/210937.jpg

3) http://www.visualsunlimited.com/images/watermarked/318/318021.jpg

4)http://www.biocrawler.com/w/images/thumb/4/4d/300px-Taxus_wood.jpg

In all the above photos the hearwood is at the center and darker in color.
Sapwood is at its periphery and has a fair color and has narrower breadth .
The cambium ( Not seen in the pictures ) is on the OUTER side of the sapwood.

Answer 2

I think the answer your looking for is that the heartwood is the dark wood in the middle of the tree, inside the living sapwood. It is the dead xylem. It originates from the vascular cambium.

Answer 3

Heartwood is the inner part of an older tree trunk. It's darker in color than the sapwood.

Vascular cambium makes new xylem, adding onto the sapwood. Eventually the sapwood becomes part of the heartwood.