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Movement of water through the dicotyledonous root

This diagram shows the movement of water through the root

  • Water is found in the spaces between the soil particles. Water enters through the cell wall and cell membrane of the root hair cell by osmosis. Water fillsthe vacuole of the root hair cell.
  • Water can now move across the parenchyma cells of the cortex in two ways:
  • Most of the water passes along the cell walls of the parenchyma cells by diffusion. Movement of water and solutes between the intercellular spaceswithout crossing the plasma membrane is known as apoplastic movement.
  • Some of the water passes from the vacuole of one parenchyma cell to the vacuole of the next cell by osmosis. Movement of water and solutes through the cells isknown as symplastic movement.
  • The water must pass through the endodermis to enter the xylem.
  • Once water is in the xylem of the root, it will pass up the xylem of the stem.

Transpiration and movement of water: http://www.phschool.com/science/biology_place/l abbench /lab9/xylem.html

This website shows a diagram of how water moves up through the plant.

http://www.neok12.com/Plants.htm

This video shows plant transport and provides some interactive quiz games.

Investigation: water uptake by roots

Aim : To measure the uptake of water by roots

Apparatus

  • Plastic 2 litre Coke bottle
  • water
  • soil
  • scissors
  • measuring scale
  • tree or plant cuttings
  • ruler

Method

  1. Remove the label from the Coke bottle. Cut the top of the bottle off 20cm from the bottom of the bottle. Poke holes in the bottom of the bottle for drainage.Hold the plant cutting in the container while you fill the container with soil. Leave one or two leaf buds about 5cm above the soil.
  2. Weigh the container to get the total weight of the bottle, soil and plant.
  3. Water the plant with enough water so that it starts to run out of the bottom of the bottle through the holes.
  4. Weigh the container again after the water has stopped running out and subtract the total weight in step 2 from the weight in step 4 to get the weight of thewater. 1 litre of water is equal to 1 kilogram of water, therefore you can work out exactly how much water is in the container.
  5. Set the containers by the window where they will receive enough sunlight. Wait for the leaves to start growing (1-3 weeks).
  6. After the leaves are growing, weigh the containers every 1-3 days for 3 weeks. Subtract the new weight from the weight calculated in step 4. The new number isthe amount of water that the plant is using. Water the plant as necessary (when the soil becomes dry), but remember to reweigh the container when you add morewater so that you can still tell how much water the plant is taking up.
  7. Draw a graph of the amount of water the plant is using. The X-axis should show the number of days since the beginning of the experiment and the Y-axis shouldshow the amount of water that the plant has used.

Question on investigation – Surely as the plant grows it forms new leaves etc which have mass? How do we subtract the mass of the new leaves to prevent

this making the mass of the entire container inaccurate in terms of how much mass is

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
why and for what was five kingdom of classification of organisms introduced
SUBHIKSHA Reply
give the ans as fast as possible
SUBHIKSHA
Comment on the ozone depletion over the period of 1982 to 1996
Mpho Reply

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Source:  OpenStax, Siyavula: life sciences grade 10. OpenStax CNX. Apr 11, 2012 Download for free at http://cnx.org/content/col11410/1.3
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