01.plant structure nra

7/28/2019 01.Plant Structure Nra

1/21

PLANT

STRUCTURE


2/21

The "Typical" Plant Body

The Root System Underground (usually)

Anchor the plant in the soil

Absorb water and nutrients

Conduct water and nutrients Food Storage

The Shoot System Above ground (usually)

Elevates the plant above the soil

Many functions including: photosynthesis

reproduction & dispersal

food and water conduction


3/21

The Body of seed plant


4/21


5/21


6/21

Plant Structure

A. Classification of Plants

1. Some plants are non-vascular (=bryophytes)

2. Some plants are seedless, vascular plants (e.g.,

ferns)3. Most plants are seed-bearing, vascular plants

- gymnosperms (no flowers, e.g., conifers)

- angiosperms (all produce flowers: dicots and

monocots)

B. Structure of Flowering Plants (= angiosperms)


7/21

Angiosperms, flowering plants, are divided into two groups:

monocots and dicots
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookglossM.htmlhttp://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookglossD.htmlhttp://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookglossD.htmlhttp://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookglossM.html


8/21

Monocots vs. Dicots

Monocots Dicots

Floral Arrangement

:

3's 4's and 5's

Leaf Venation : Parallel Net

Vascular bundles Scattered Ring

Habit Herbaceous Herbaceous + Woody

Roots

Fibrous

Tap root

Growth Primary only Primary andSecondary

Examples: Grass, Palm,

Orchid

Oaks, Roses,

Sunflowers


9/21

Monocots have their flower parts in threes or multiples of three; example

the tulip and lily (Lil ium).

Dicots have their flower parts in fours (or multiples) or fives (or

multiples). Examples of some common dicot flowers include the geranium,

and citrus.


10/21

the scattered vascular bundles of the corn stem the ringed array of vascular bundles in this

dicot stem (Medicago).


11/21

Anatomy Of Monocot Stems

A cross section of the stem of corn

(Zea mays) showing parenchyma

tissue and scattered vascular

bundles. The large cells in the

vascular bundles are vessels


12/21

Plant stem
http://en.wikipedia.org/wiki/Image:Plant_nodes_c.jpghttp://en.wikipedia.org/wiki/Image:Stem_nodes.jpg


13/21

Spermatophytes

Includes flowering or seed-bearing plants.

The two subdivisions are.

Gymnosperms

Angiosperms


14/21

Plant Characteristics


15/21

Identifying Plants

Physical characteristics are used to identify

plants which include.

Life Cycle

Form

Foliage Retention

Plant Parts

Use & Location


16/21

Life Cycle

Annuals

Plants that complete their life cycle in oneyear.

Biennials Plants that complete their life cycle in

two years.

Perennials Plants that live more than two years.


17/21

Growth Habits

Trees

Shrubs Vines


18/21

Growth Forms

Columnar

Spreading

Weeping

Round

Oval

Pyramidal


19/21

Growth Forms

Spreading

Columnar

Weeping


20/21

Growth Forms

Round Oval Pyramidal


21/21

Foliage Retention

Deciduous

Loses leaves during the dormant season.

Evergreen

Keeps leaves and remains green year-round.

01.plant structure nra

Documents