Meristem

[simonm]

Describe a meristem... A group of cells in a tree where cells divide, primary or apical meristems produce elongation of branches & stems, secondary or lateral meristems increase mass, girth. 2 types of lateral meristems 1 cambium split into xylem & phloem xylem inner phloem outer, cork cambium produces periderm or bark.

 

In a nutshell is that right.

[simonm]

Not 1 person can answer that!

[ArbMatt]

Yeah i agree with that, their are meristem cells that are just behind the root cap aswell

[simonm]

Yeah i agree with that, their are meristem cells that are just behind the root cap aswell

 

[MATTMOSS]

Describe a meristem... A group of cells in a tree where cells divide, primary or apical meristems produce elongation of branches & stems, secondary or lateral meristems increase mass, girth. 2 types of lateral meristems 1 cambium split into xylem & phloem xylem inner phloem outer, cork cambium produces periderm or bark.

 

In a nutshell is that right.

 

Yes

[daltontrees]

Not quite right, because the area of elongation and cell division at the root tip is also meristem.

 

Plus there is a third kind of meristem called 'residual'.

 

And the apical meristem is also responsible for producing lateral outgrowths that eventually become side branches and leaves.

 

Here's how they fit together.

1. Primary meristem produces elongation of stems and roots and commencement of side growths in stems (not in roots).

2. Residual meristem assorts the new cells into final shape, strands and layers.

THEN Permanent tissue is formed from this structure

3. From the permanent tissue, cell division recommences (secondary meristem) to produce the vascular and cork cambium layers that are responsible for the next year's annual increment and bark production.

 

And so to goes on, till you have a tree.

 

Shortest possible answer is meristem is a plant growth point.