Please correct me if I'm wrong, and I probably am wrong.

Plants don't have a circulatory system. There is no circulatory loop
like with mammal blood. All moisture goes from the roots up. This is
caused by moisture evaporation from the leaves.

Theorhetically then, you could chop off a plant at ground level and
connect the stem to a vacuum suction pump and the roots wouldn't know
the difference, the roots would continue to grow.

What's wrong with this theory? Or might it actually work? If not then why?

Thanks for your help.

On Fri, 19 Mar 2004 11:46:35 -0500, "Bruce W.1"
wrote:

Please correct me if I'm wrong, and I probably am wrong.

Plants don't have a circulatory system. There is no circulatory loop
like with mammal blood. All moisture goes from the roots up. This is
caused by moisture evaporation from the leaves.

Theorhetically then, you could chop off a plant at ground level and
connect the stem to a vacuum suction pump and the roots wouldn't know
the difference, the roots would continue to grow.

What's wrong with this theory? Or might it actually work? If not then why?

Thanks for your help.
I know in some instances this can't be true case in boint plants like
spanish mos which don't really have roots and some plants absorb
moisture right from the air like a lot of tropical plants.
I think a few orchids are like that but I'm no expert these are just
my random thoughts on the subject so I could be wrong I in the case of
celery which I did a project on in the third grade the process is
definatly one way.
We used food coloring to track vascular activity.
and we tried to see if the food coloring would travel in the oppisite
direction by misting the leaves with water that had a bit of food
coloring in it and we varried the amounts and no color traveled down
just what was risidual on the leaves and I can get color in al lot
of my white flowers such as mums roses and my carnations by adding
food color to my water or plant food when I water or feed and I get a
better result when I use it in the food
and it does not work hardely at all with my bulbs If any one knows
why that is that would be interesting
well those are my thoughts and experiances
hope they help some in your querry
Michelle
back from being away for a while Missed you guys

The roots would not survive. There is no circulatory system~as you state.
However there is a two way passage. From the roots water and nutrients to
all parts and then complex 'foods' manufactured by the leaves also to
everywhere including the roots so they can survive and grow.
Water travels via the woody parts [xylem] and food via the phloem in the
bark. This is why ring-barking will kill a tree relatively quickly.
Best Wishes
"Bruce W.1" wrote in message
news:LtF6c.9871$F91.6868@lakeread05...
Please correct me if I'm wrong, and I probably am wrong.

Plants don't have a circulatory system. There is no circulatory loop
like with mammal blood. All moisture goes from the roots up. This is
caused by moisture evaporation from the leaves.

Theorhetically then, you could chop off a plant at ground level and
connect the stem to a vacuum suction pump and the roots wouldn't know
the difference, the roots would continue to grow.

What's wrong with this theory? Or might it actually work? If not then
why?

Thanks for your help.

Plants don't have a circulatory system?

What are phloem and xylem then?

What's wrong with your so-called theory is that its not based on any
observations nor research.

Go and check out a website or two or more on basic plant anatomy and don't
get back to us. Better yet go to the library and read up on the subject.


"Bruce W.1" wrote in message
news:LtF6c.9871$F91.6868@lakeread05...
Please correct me if I'm wrong, and I probably am wrong.

Plants don't have a circulatory system. There is no circulatory loop
like with mammal blood. All moisture goes from the roots up. This is
caused by moisture evaporation from the leaves.

Theorhetically then, you could chop off a plant at ground level and
connect the stem to a vacuum suction pump and the roots wouldn't know
the difference, the roots would continue to grow.

What's wrong with this theory? Or might it actually work? If not then
why?

Thanks for your help.

"Bruce W.1" wrote in message
news:LtF6c.9871$F91.6868@lakeread05...
Please correct me if I'm wrong, and I probably am wrong.

Plants don't have a circulatory system. There is no circulatory loop
like with mammal blood. All moisture goes from the roots up. This is
caused by moisture evaporation from the leaves.

'Transpirational pull', yes, plays a part, there is also rootzone pressure
forcing the moisture up. Water *does* travel back down the plant via the
phloem, on its way back to the cortex portion of the root. Once the
sugar-laden water passes through the phloem laterally into the cortex
(osmosis), it then moves back out into the outer portions of the root for
its trip back up the plant. Trees and shrubs 'use' very little water to
sustain themselves-- I think about 8-10% in fact. The rest is either
returned to the rootzone laden with sugar or is transpirationally lost.


Theorhetically then, you could chop off a plant at ground level and
connect the stem to a vacuum suction pump and the roots wouldn't know
the difference, the roots would continue to grow.

*Some* plants have roots that would continue to grow, if there was suitable
levels of fuel (starch) available for the plant's roots to begin the process
of producing stem tissue.


Dave

Xref: kermit rec.gardens:268929

On Fri, 19 Mar 2004 11:46:35 -0500, "Bruce W.1"
wrote:

Please correct me if I'm wrong, and I probably am wrong.

Plants don't have a circulatory system. There is no circulatory loop
like with mammal blood. All moisture goes from the roots up. This is
caused by moisture evaporation from the leaves.

Theorhetically then, you could chop off a plant at ground level and
connect the stem to a vacuum suction pump and the roots wouldn't know
the difference, the roots would continue to grow.

What's wrong with this theory? Or might it actually work? If not then why?

Thanks for your help.

xylem and phloem I think.. anyway, there is a circulatory system,
Water comes up f rom the roots, along with nutrients, and the leaves
do their photosynthesizing and send nutrients down to the roots to
feed them, support their growth, and in the case of cold climate
areas, the roots store up energy to support the returning growth the
next spring.

The Cambium layer, just under the bark, in trees does a good deal of
the growing of new wood..you know those rings they use to date the age
of a tree.. as well as to help determine what the climate was
like..narrow rings in drought years, wide rings for good years. If
you girdle a tree.. cut through that cambium layer all the way around
the tree.. it cuts off the circulation of the tree.. and it dies as
nutrients don't get distributed down from the leaves or up from the
roots.

So, yup the roots would know the difference if you cut off the top,
with or without the suction pump as it wouldn't feed them! ;-)

Janice

On Fri, 19 Mar 2004 12:20:54 -0500, Michelle
wrote:

On Fri, 19 Mar 2004 11:46:35 -0500, "Bruce W.1"
wrote:

Please correct me if I'm wrong, and I probably am wrong.

Plants don't have a circulatory system. There is no circulatory loop
like with mammal blood. All moisture goes from the roots up. This is
caused by moisture evaporation from the leaves.

Theorhetically then, you could chop off a plant at ground level and
connect the stem to a vacuum suction pump and the roots wouldn't know
the difference, the roots would continue to grow.

What's wrong with this theory? Or might it actually work? If not then why?

Thanks for your help.
I know in some instances this can't be true case in boint plants like
spanish mos which don't really have roots and some plants absorb
moisture right from the air like a lot of tropical plants.

Yup there are some plants which live in a humid enough environment can
absorb moisture and nutrients from the air. Some just use the trees
as a support system, others are parasitic, and let the tree do the
work of sucking up the nutrients, and they just attach themselves and
tap into the resources. Spanish moss has no roots, reproduces
vegetatively. and by seeds. They're related to pineapples!

I think a few orchids are like that but I'm no expert these are just
my random thoughts on the subject so I could be wrong I in the case of
celery which I did a project on in the third grade the process is
definatly one way.

We used food coloring to track vascular activity.
and we tried to see if the food coloring would travel in the oppisite
direction by misting the leaves with water that had a bit of food
coloring in it and we varried the amounts and no color traveled down

The celery was cut off from the roots, so it just took water like a
flower would, but there were no roots anymore to complete the cycle of
water up from the roots to the plant, supporting the plant physically
by turgidity.. sort of like our blood pressure (you've seen wilted
celery). When the leaves manufacture food, it get distributed to the
roots and elsewhere.
just what was risidual on the leaves and I can get color in al lot
of my white flowers such as mums roses and my carnations by adding
food color to my water or plant food when I water or feed and I get a
better result when I use it in the food
and it does not work hardely at all with my bulbs If any one knows
why that is that would be interesting
well those are my thoughts and experiances
hope they help some in your querry
Michelle
back from being away for a while Missed you guys

I vaguely recall something about putting white carnations in water
that food coloring had been added to and it would change their colors
somewhat. ;-)

Janice