Plant Anatomy PowerPoint Presentation

Plant Anatomy PowerPoint Presentation

2016-07-19 77K 77 0 0

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Unit 1. Chapter . 6. Lesson 4. Flowers, Fruits, & Seeds. Flowers are pretty & contain nectar in order to attract insects. These insects fertilize the flower by pollination. Pollination begins fruit and seed formation. ID: 410703

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Presentations text content in Plant Anatomy

Slide1

Plant Anatomy

Unit 1Chapter 6Lesson 4

Slide2

Flowers, Fruits, & Seeds

Flowers are pretty & contain nectar in order to attract insectsThese insects fertilize the flower by pollinationPollination begins fruit and seed formation

 

                               

Slide3

Fruits & Seeds

Fruits and seeds are eaten, collected, and spread out by animals and peopleThis reproduces the plant

Slide4

Seeds

Seeds have special devices to ensure propagation Some seeds are sticky (thistles), some float in the wind (dandelions), others can survive stomach acid (cherry pits)

Slide5

Flower Parts

Flowers differ in shape, size, and color, but all have relatively the same parts

Slide6

Flower Parts cont.

Seeds are the most common way plants reproduce in nature Sexual process involving male and female parentsA complete flower has both male and female parts Only one parent is needed if a plant is self-fruitful, or can pollinate itself

Slide7

Flower Parts cont.

4 main parts SepalsPetalsStamensPistil

Slide8

The Sepals

Green, leaf like parts of the flower that cover and protect the flower bud before it is open

Slide9

Petals

Are actually leavesGenerally the most striking part of the flowerBright colors are used to attract insects for pollination

Slide10

The Stamens

Male reproductive partEach stamen consists of:FilamentAnther – contains the pollen (male sex cell)

Slide11

The Pistil

Located in the center of the flowerFemale partProduces female sex cells (eggs or ovules)If fertilized, the eggs become seeds

Slide12

Parts of the Pistil

3 main parts:Stigma – sticky, catches the pollenStyle – tube that leads to the ovaryOvary – eggs develop here, after fertilization the ovary grows to become a fruit or seed coat

Slide13

Slide14

Flower Construction

Insects looking for nectar have to climb over the anther and brush pollen on their legsAs they climb towards the center looking for food, they deposit pollen on the stigma

Slide15

Fertilization

After an insect deposits pollen, fertilization begins!The pollen grain sprouts and sends a long stalk (pollen tube) down the style to the ovary

Slide16

Fertilization cont.

The pollen sperm cell can then fertilize the female egg cells and seeds begin to developThe ovary enlarges into a seed coat or fruit

Slide17

Pollen

Slide18

Incomplete Flower

Has ONLY male parts or female parts Male flower – sepals, petals & stamens but no pistilFemale flower – sepals, petals, & pistil, but no stamensExamples: Kiwi, Ginkgo

Slide19

Flowers are Important!

Many plants are grown only for their flowersFloriculture industry in a multimillion dollar business!!!

Slide20

What is the major function of flowers?

Reproduction of the Plant

Slide21

What is a fruit?

A ripened flower ovaryBotanically, fruits = vegetables & vegetables = fruitsIn most plants, a fruit is formed following fertilization of the ovulesThey contain seeds

Slide22

What about seedless fruit?

Seedless fruit -- fruit that form without pollination or fertilizationThese fruit are called PARTHENOCARPICExamples: Banana, navel orange

Slide23

When the fruit ripens, the ovary wall thickens.

This is called the pericarpThe pericarp has three sections:The endocarpThe mesocarpThe exocarp

Slide24

Types of Fruits

Aggregate fruitsMultiple fruitsSimple fruits

Slide25

Key Flower Terms

Flower

Reproductive organ of the plant

Pedicel

Flower stem

Receptacle

Tip of the pedicel that holds the flower parts

Sepals

Leaf-like structure that is the exterior portion of the flower

Slide26

Key Flower Terms

Calyx

The term for all of the sepals or a flower, collectively

Corolla

The term for all of the petals of a flower, collectively

Perianth

The term for the sepals and petals of a flower, together

Slide27

Key Flower Terms

Tepals

Term used when there is not a clear distinction between the petals and sepal of the flower

Stamen

Male part of the flower

Made of anther and filament

Produces the pollen

Pistil

Female part of the flower

Contains the stigma, style, and ovary

Produces the ovules (eggs) of the flower

Slide28

Key Flower Terms

Complete flower

Flowers that have sepals, petals, stamens, and a pistil

Incomplete flower

A flower that lacks 1 or more of the parts of a complete flower

Perfect flowers

Have both male and female parts

Imperfect flowers

Flowers that lack 1 or more sex structures

Slide29

Key Flower Terms

Solitary flowers

Stem with only one flower on it

Tulip, narcissus, rose

Inflorescence

Plants with flower clusters

Peduncle

Main stem of an inflorescence

Determinate

When the first flower to open is at the apex with progression moving down the stem

Slide30

Key Flower Terms

Indeterminate

Last flower to open is at the apex as the flowering had an upward movement

Slide31


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