Plant Bodies as Systems

Objectives:

• Explain the organization of Plants

• Identify and describe the different

body systems in a plant

• Evaluate how the survival needs

of plants are met by systems

working together

I. What are the Characteristicsof Plants?

Multicellular or Unicellular?•Multicellular!!!Eukaryotes or Prokaryotes?•Eukaryotes!!!! (cells have nucleus & membrane bound organelles)

I. What are the Characteristicsof Plants?

•All plant cells have ________ and a large ______

Cell walls and water vacuole!!!•Plants convert Light Energy into chemical Energy in food in a process called___________

Photosynthesis!!!!!!!!

Plants live in all sorts of environments!

Dry Desert

Cold Tundra

Ponds

Forest

II. How are Plant Bodies Organized?•Plant are multicellular and have cells that are

specialized•Plant cells are organized into

tissues

Specialized Cells

Make up

Made ofsimilar

cells

Organization of Multicellular Organisms

Remember: Same type Organization as Animals

III. What are The Three Types of Tissues in Plants?

• Vascular

• Ground

• Dermal

What are the jobs of these 3 plant tissues? • Vascular tissue- (like

the Blood vessels in

animals)

• innermost tissue in stemMade of phloem cells & xylem

cells

phloem cells transport sugar

(food)

throughout the plant

xylem cells provide physical

support

and carry water

• Ground Tissue-middle layerMade of photosynthesizing cells& support & storage cells

What do you think the job of the Dermal

tissue is?(think epidermis) outermost layer

Dermal Tissue-These cells act as a barrier by

protecting the more delicate

inner tissues controlling the exchange of

materials

IV. What are The Organs of a Plant ?

What Organ?

What is the job of the root?

Roots -Absorb water & dissolved nutrients.

help anchor plant

growth time lapse

What is the name of the Organ?

What is the job of the stem?

• Stem-

Transports nutrients

to all parts of the

plant body and

provides support to

the plant

What is the name of this organ?

Leaf

What is the Job of the Leaf??Leaf-

provides a large

surface area for

photosynthesis

to

take place

What is the name of these organs?

Flowers- Reproductive

Organs

What is the job of these organs?

• Reproductive organs (flowers, cone,

capsules)

Producing offspring (seeds, spores)

V. What are the Systems in a Plant??

Root systemplant systems

Review what you have learnedWhich plant tissue acts likes straws that bring water up a plant?

•Ground tissue

•Phloem tissue

•Xylem tissue

•Dermal tissue

Xylem tissue!!!!

What plant tissue transports food about the plant?

•Ground tissue

•Phloem tissue

•Xylem tissue

•Dermal tissue

Phloem

Which of the following is considered a plant organ?

Xylem

Phloem

Dermis

Root

root

Which of the following absorbs water and minerals?

•Roots

•Leaves

•Flowers

•Stems

roots

Which of the following is not a part of the shoot system?

•Flower

•Stem

•Root

•Leaf

Root

Which of the following is responsible for developing offspring?

AB

C

D

A, C, DFlower, cone, capsule

Which of the following produces food for the plant using the sun’s energy?

•Roots

•Stems

•Leaves

•Flowers

Leaves

How does Structure in Plants Relate to Function?

Objective: to describe how structure in plant parts relates to the function of these parts

I. Structure•Organisms have evolved over time to retain parts with structure or characteristics that have allowed the organisms to be successful in their environment

•Ex. Prickly pear cactus live in hot dry habitats. The green stems are wide, thick and have pores (stomata). The leaves are short spines with no pores

How is the structure of the prickly pear helpful in allowing it to live in the desert?

•The prickly pear cactus has thick green stems used for photosynthesis and water storage. The stem has pores for gas exchange (CO2, O2). The leaves are modified as spines which are sharp and pointed to deter animals from eating it.

II. How does the structure of the Venus Flytrap leaves relate to its function?

• Venus' Flytraps gather nutrients from gases in the air and nutrients in the soil.

• However, they live in poor soil and are healthier if they get nutrients from insects.

• Carnivorous plants live all over the world but the Venus Flytrap is native to select boggy areas in North and South Carolina.

Feed me Seymour!!!

II. How does structure of the Venus flytrap’s leaves relate to its function?

structure ObservableCharacteristics

Function

VenusFlytrap

leaf

Venus flytrap

To trap prey

such as insects

and digest and

absorb nutrients,

such as Nitrogen,

it cannot get from

the soil

Leaves are large and

flat,

glands make nectar,

trigger

hairs cause leaves to

close,

fringed outer leaves

trap

insect, digestive

glands

secrete

digestive juices

III. How does the structure of Vascular tissue (Xylem & Phloem) relate to its Function?

Vascular Tissue StructuralObservations

Function

Xylem

PhloemTransport food from

leaves to other parts of

plant

Transport water from roots to stem/leaves

Wide tubes in a bundle

Narrow tubes in a bundle

III. How does the structure of Vascular tissue (Xylem & Phloem) relate to its Function?

Vascular Tissue StructuralObservations

Function

Xylem

Phloem Transport food from

leaves to other parts

of plant

Transport water from

roots to stem/leavesWide tubes in a bundle

Narrow tubes in a bundle

IV. How does the flower structure relate to its function?

Organ StructuralObservations

Function

Flower

Colorful, long tubular petals, Reproductive organ (male) near edge

Attract pollinators* for reproduction(*transport sperm (pollen) to egg)

://flower pollination

Check Understanding(do in workbook)

•Pg. 54: # 12, #13•Pg. 68: # 5- # 7•Pg. 70: # 10

How does structure and function relate?

Organ Structural observations

Functions

stemTransports nutrients, storeswater, supports plant

leafCaptures sunlight for making nutrients,regulates water loss

flower Attractspollinators

Pg. 54 in workbook

Long andthin

Green wide and flat

Bright color,top of plant

How does the structure of the Sundew’s leaf relate to its function?

Sundews live in a habitat wheresunlight and water are plentiful, but the soil has limited nutrients. Sundewsmake food throughphotosynthesis.

Pg. 68Sundew video clip

Questions pg. 68•5. Why do you think sundews need to capture insects?

•D. Sundews grow in nutrient-poor soil, so trapping insects is a way the plant meets its needs.

•6. Sundews have weakly developed roots. Why do you think sundews do not need strong roots?

•Since there is plenty of water in the soil, but not enough nutrients, a strong root system is not needed.

7. How does the structure of the sundew leaf relate to its function?• The leaves of the sundew are long, narrow, and

have clear drops on end of tentacles. • This sticky substance helps attract and then

trap the insects • When an insect lands it adheres to the surface

of the leaf. As the insect struggles, the leaf curls over the insect and further traps it.

• The leaf produces digestive juices which allows the organism to digest and absorb the insect.

Compare Root Systems

Tap Root Fibrous Root

Complete the Venn diagram • Absorbs nutrients

• Stores nutrients

• Drought tolerant

• Absorbs water

• Anchors plant

• Protects soil

taprootBoth

fibrous root

Absorb water

Absorb nutrients

Anchors plant

Drought tolerant-can get waterdeep in soil

Protects soil-traps moisture, prevents soil erosion

Pg. 70 in workbook

Stores nutrients

How do Body Structures and Systems Work Together to Perform all the Life Processes Needed For a Plant to Live? Objective: to describe how the plant body parts and systems accomplish certain life functions

I. Response to Light•Plants need light so that they are able to perform photosynthesis

•Plants need to hold their leaves up to the sun and expose as many cells withchloroplast toward the light.

•Plants respond to light by their stems growing towards the sun or light source

•This response is called Phototropism

•Photo (light) Tropism (plant response of growing toward or away from a stimulus)

Phototropism in action

•Phototropism

•phototropism in radish seeds

II. Positive vs. Negative Tropism

•A positive tropism is growth towards a stimulus

•A negative tropism is growth away from a stimulus

• * a stimulus is a factor in the environment that causes a response

Phototropism

Stems show a _________phototropic response

positive

Geotropism and phototropism

III. Response to other factors•A. Geotropism is the plant response towards gravity with the earth.

•What part of plants would have a positive geotropic response and which part would have a negative geotropic response?

•Stems would have a negative geotropic response

•Roots would have a positive geotropic response

Geotropism

Auxin-• A plant hormone thataffects cell growth

Plants in space

B. Thigmotropism•is the movement or change in orientation of a plant’s growth as a reaction to touch. The orienting factor is generally a hard surface that can change the direction of the plant’s growth or the growth of one of its organs.

•Thigmotropism can be in the form of opening or closing of parts of the plant such as the petals or leaves, the coiling of the plant around the surface, as well as other ways.

Thigmotropism example:•There are a few different ways that different climbing plants use to cling to surfaces and to change their own shape.

• ex. Humulus Lupulus,

the hop plant has

tendrils which wrap

around posts, stems etc.

What controls this?

•Tendrils start off by bending in search of a surface to grow across. Once they find it, the part of the tendril that is in touch with the surface will produce a hormone called auxin, which stimulates a large region on the tendril that isn’t in touch with the surface to grow. The hormone ethylene aids in growth and controls the shape of the cells. The overall process results in the cells touching the support surface contracting or growing slower while those not touching it expand or grow faster

Plant Hormones!!!

* Biologydictionary.net

Thigmatropism in action!

• ://www.youtube.com/watch?v=H9MV5CgPgIQ

IV. Processing Nutrients

•Plant cells get their energy for life from food. Plants produce their own food through the process of photosynthesis. They first must trap and convert the energy from the sun into chemical energy inside a molecule of glucose (sugar).

•In order to perform this process, plant systems work together to get the necessary ingredients for photosynthesis.

Chemical Equation for the Process of Photosynthesis

•Photosynthesis is a chemical process. That means a new substance is formed from other substances.

•In a chemical equation, what goes into the process is in the beginning, is left of the arrow. What is made from these ingredients is on the right side of the arrow (product).

•Chemical Equation of Photosynthesis:

•6H2O + 6CO2 + light E C6H12O6 + 6 O2

•Water plus carbon dioxide plus light yields glucose(sugar) and oxygen

https://http://www.youtube.com/watch?v=cFX4JrsPaUs

https://www.youtube.com/watch?v=mc9gUm1mMzc

Using your workbook pgs.69-73

•Read content

•Fill in chart on pg. 69, # 8,9 pg 72 11 & 12

•Answer the questions on Google classroom :How Plant Systems Process Nutrients

INPUTS AND OUTPUTS Of Photosynthesis