IMPORTANCE OF PLANTS

Presentation on theme: "IMPORTANCE OF PLANTS"— Presentation transcript:

Slide1

IMPORTANCE OF PLANTSSlide2

Importance of Plants

Oxygen

Food/feedMedicinehttp://www.youtube.com/watch?v=6iEOTB1UjjQ Absorb Carbon DioxideDecoration (Aesthetic) Slide3

PLANT LIFE CYCLESSlide4

Plant Life Cycle

Annual

Goes from seed to producing seed in one growing seasonEx. Corn, beansSlide5

Summer Annuals

Summer annuals

germinate in the spring. Summer annuals produce leaves, flowers, and seed before dying during the summer or fall. Many crops and garden plants are annuals. Corn, soybeans, rice, wheat, potatoes, and tomatoes

Petunias, impatiens, marigolds, and zinnias

Ragweed, pigweed, lambsquarter, crabgrass

Photo, courtesy USDA Peggy GrebSlide6

Winter Annuals

The seed of a

winter annual germinates in the fall. The immature plant overwinters as a compact rosette. Once the plant has received a sufficient period of cold treatment, it bolts. Slide7

Winter Annuals

Bolting

is a process in which the stem of a plant rapidly elongates at the time of flowering. Flowers then develop, seeds are set, and the plant dies. Winter wheatSlide8

Plant Life Cycle

Biennial

Goes from seed to producing seed in two growing seasons1st year – vegetative growth

2

nd

year – vegetative and flower growth

Ex. Carrot, burdockSlide9

Biennials

Biennials

are plants that normally require two growing seasons to produce flowers and seed before dying.

First growing season: biennials grow vegetatively.

Next: plants go dormant and rest until the Spring

Winter: receive a required cold treatment

Growth is resumed in the spring of the 2

nd

season.

The plants bolt, flower, produce seed, and die.

Hollyhock, Sweet William, parsley, beets, and carrotsSlide10

Plant Life Cycle

Perennial

Lives more than two growing seasonsEx. Trees, shrubsSlide11

Perennials

A

perennial is a plant that has a life cycle of more than two growing seasons. May take perennial plants a few years to many years to reach reproductive maturity. Perennials may be woody like trees and shrubs or herbaceous.Slide12
Slide13

On the flip chart(s) – create a Venn-Diagram to compare and contrast the three types of plant life cycles Slide14

MAJOR PLANT STRUCTURES Slide15

Major Plant Structures

Flower

Attracts insects for pollinationFruitSeed-carrying structureSlide16

Major Plant Structures

Seeds

Produces new plantsLeavesProduces food/sugarsSlide17

Major Plant Structures

Stem

Supports the plantTransports water, nutrients and food/sugarRootsAnchors plantAbsorbs water and nutrientsStores food