Bell Ringer: 9/19sammonssci.weebly.com/.../9-19_plant_transport_ppt.pdfIncludes mosses (Bryophyta),...

Bell Ringer: 9/19

Gymnosperm or Angiosperm?

1. This plant has a finite growing season and the

seeds are encased in tissue.

2. This plant will stay green year around and has

“naked seeds”.

3. Monocot and Dicot are the two types of the

seed plant.copyright cmassengale 1

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Plant Transport

copyright cmassengale

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Taxonomy Plants are divided

into two groups Based on the

presence or absence of an internal transport system for water and dissolved materials

Vascular vs. Nonvascular

Vascular Bundles


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Nonvascular Plants

Do not have vascular tissue for support or conduction of materials

Called Bryophytes

Require a constantly moist environment Moss Gametophytes &

Sporophytes

Sporophyte stage

Gametophyte Stage


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Nonvascular Plants

Plants can’t grow as tall Cells must be in direct contact with moisture

Materials move by diffusioncell-to-cell

Sperm must swim to eggthrough water droplets


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Nonvascular Plants

Includes mosses (Bryophyta), liverworts (Hepatophyta), and hornworts (Antherophyta)

Liverworts Hornwortscopyright cmassengale

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Vascular Plants

Also called Tracheophytes

Subdivided into two groups --Seedless vascular plantsand Seed-bearing vascular plants (Angiosperms and Gymnosperms)

Club Mosscopyright cmassengale

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Vascular System

Xylem tissue carries water and minerals upward from the roots

Phloem tissue carries sugars made by photosynthesis from the leaves to where they will be stored or used

Sap is the fluid carried inside the xylem or phloem


Vascular Tissue of Root

Plays a key role in

water and mineral

transport.

Root hair provide large

surface area for uptake.

This is where most

water and minerals are

absorbed.

copyright cmassengale 9

Vascular Tissue in Stem

Monocots- vascular bundles are scattered

thoughout the stem.

Dicots- vascular bundles are in a cylinder.


Vascular Tissue in Leaf

Photosynthesis!

Because water also

evaporates from

surfaces and lost to

atmosphere

Transpiration occurs!

Lost water is drawn in

through xylem vessels.

Gas exchange also

occurs here. copyright cmassengale 11

When plants give off O2 they open stomata, but then close again so that too much water loss does not occur. They keep them open long enough for photosynthesis to occur.

Transport in Plants

Water Transport

- The combination of root

pressure, capillary

action, and transpiration

provides enough force to

move water though xylem

even in the tallest plants.

- Capillary action- cohesion +

adhesion (water molecules

stick together)


Transport in Plants

Nutrient Transport

- Nutrients are pushed though phloem. This process

moves sugars from sources to a sink.

- Sources are where sugar is produced, sinks is a cell

where sugar is used or stored.


As nutrients move, this changes

concentration levels and changes movement

in fluid. As a result- phloem is about to

move nutrients any where it is needed.

Stations!


Bell Ringer: 9/19sammonssci.weebly.com/.../9-19_plant_transport_ppt.pdfIncludes mosses (Bryophyta),...

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