PLANT SCIENCE Ms Tenneson 2015 Major Plant Organs

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PLANT SCIENCE Ms. Tenneson 2015

PLANT SCIENCE Ms. Tenneson 2015

Major Plant Organs Roots Leaves Stems Fruit Flowers

Major Plant Organs Roots Leaves Stems Fruit Flowers

Types of Root Systems

Types of Root Systems

ROOT PARTS Root hairs Root cap Meristem

ROOT PARTS Root hairs Root cap Meristem

Parts of Root Systems n Root Hairs- involved in absorption of nutrients from the

Parts of Root Systems n Root Hairs- involved in absorption of nutrients from the soil n Root Cap & Meristemconducting tissue, involved in gathering moisture & nutrients for the plant

Leaf parts blade petiole midrib apex base margin stomata

Leaf parts blade petiole midrib apex base margin stomata

LEAF PARTS

LEAF PARTS

Leaves n Food manufacturing factory of the plant which performs Photosynthesis and contains the

Leaves n Food manufacturing factory of the plant which performs Photosynthesis and contains the green pigment, Chlorophyll

LEAF TYPES simple compound needle simple leaves

LEAF TYPES simple compound needle simple leaves

Leaf arrangements simple leaves

Leaf arrangements simple leaves

Leaves compound leaves

Leaves compound leaves

STEMS central support structure of the plant

STEMS central support structure of the plant

STEM PARTS buds nodes internodes bark lenticels leaf scars scale scars

STEM PARTS buds nodes internodes bark lenticels leaf scars scale scars

Bud n n A point of new growth A immature flower Terminal Bud Auxiliary

Bud n n A point of new growth A immature flower Terminal Bud Auxiliary Bud

Nodes & Internode n A point of growth on the stem

Nodes & Internode n A point of growth on the stem

Bark Lenticels n Acts as a pore. Allows for gas exchange between the plant

Bark Lenticels n Acts as a pore. Allows for gas exchange between the plant and the atmosphere

Scale / Leaf Scars n Exactly what is sounds like

Scale / Leaf Scars n Exactly what is sounds like

FRUIT TYPES Simple: derive from a single pistil Compound: form from several ovaries at

FRUIT TYPES Simple: derive from a single pistil Compound: form from several ovaries at one time Accessory: develop from parts other than the ovary

Simple fleshy fruits Drupes or Pomes

Simple fleshy fruits Drupes or Pomes

Simple dry fruits

Simple dry fruits

Compound fruits n n Multiple Aggregate separate flowers fused into a single structure many

Compound fruits n n Multiple Aggregate separate flowers fused into a single structure many ovaries on a single flower

FLOWERS Flowers usually contain four main parts: sepals petals stamens pistils

FLOWERS Flowers usually contain four main parts: sepals petals stamens pistils

FLOWER PARTS A “complete” flower has all four main parts. A “perfect” flower has

FLOWER PARTS A “complete” flower has all four main parts. A “perfect” flower has stamens and a pistil.

FLOWER PARTS The pistil is composed of : Stigma: structure at the top for

FLOWER PARTS The pistil is composed of : Stigma: structure at the top for collecting pollen Style: support structure below the stigma Ovary: enlarged part holding the ovules (eggs) The stamens consist of: Anthers: contain the pollen Filaments: anther support

FLOWERS

FLOWERS

PLANT CLASSIFICATIONS Plants are classified by flower and type: A monoecious plant has male

PLANT CLASSIFICATIONS Plants are classified by flower and type: A monoecious plant has male and female flowers on the same plant A dioecious plant has male and female flowers on different plants a pistillate plant has only female parts A staminate plant has only male parts A hermaphroditic plant has a perfect flower