Is there a vascular bundle in a pine stem?

Question

We were looking at specimen through a microscope

and i was confused as to where this vascular bundle was located.

Answer 1

There are vascular bundles in Pine Stem . No doubt about it .

click the link below = you will notice vascular bundles in primary ( Before secondary) growth.

in the same diagram you will see vascular cambium. Even though the inter vascular cambium is not labeled you can see it in between the vascular cambium. The arrangement is the same for Dicot plants AND the conifers like Pinus ( Pine )= now click on it =

http://www.botany.hawaii.edu/faculty/web...

Now click on the link below  and SCROLL DOWN  till you get relevant  diagrams . You will notice that due to secondary growth , the IDENTITY of indivdual vascular bundles is lost and they MERGE  in to each other and form a CONTINUOUS RING of xylem and phloem . = now click =

http://www.botany.hawaii.edu/faculty/web...

Now in the link below there is a section of pinus stem labeled .

The xylem ( Secondery , therefore merged ) is labeled .

phloem is not labeled but it is the THIN YELLOWISH LAYER JUST EXTERNAL TO RED STAINED XYLEM .= NOW CLIK=

http://www.botany.hawaii.edu/faculty/web...

Now your are in position to interprit more images of Pine stem section and are convinced that there are V. B.s in Pine stem. =Click the links one by one =

You have to scroll  down in this , but good diagrams labeled =

http://www.botany.hawaii.edu/faculty/web...

only photo = this is what you must have seen =

http://sols.unlv.edu/Schulte/Anatomy/Ste...

http://sols.unlv.edu/Schulte/Anatomy/Ste...

Lastly an old stem with annual ring =

http://www.nikonsmallworld.com/images/ga...

From = A Botanist