Science’s Power Point

Created by : Muhamad Syaffiq bin Musa

Amir Rusyaide bin Noor Azmi

SUPPORT AND MOVEMENT

Supports system in plants are divided by two :

SUPPORT SYSTEM IN PLANTS

Plants

AquaticLand

Woody Non-woody

Woody plants

Woody plant are supported by woody tissue. Woody tissue is hard and gives the plant shape and provides it with stregth to hold itself upright.

Woody plant are also supported by special structures such as Butress Root and Stilt Root.

SUPPORT SYSTEM OF LAND PLANTS

Support Systems in Plants

Examples of woody plants are angsana trees, durian trees, rose plants, mangrove trees, pine trees and flame of the forest.

durian mangroveroseangsana

Woody plants

Non-woody plants

Non-woody plants have two types of supported systems which are :

a) Herbaceous plants which are supported by turgrid pressure and special structures such as props root or tendrils.

b) Non-woody plants (herbs) such as balsam and mustard are supported by cell turgidity.

SUPPORT SYSTEM OF LAND PLANTS

Support Systems in Plants

Examples of Herbaceous or non-woody plants are balsam plants, tomato plants, paddy plants, banana trees and grass.

balsam paddy grassbanana

Non-woody plants

SUPPORT AND MOVEMENT

The special structures of plant that support land

plants

Hooks or thorns

Twining stem

Aerial clasping root

Buttress Root

Tendrils

Clasping Root

Breathing Root

Prop Root

Special structures of plant that support plants

Hooks or thorns

Rattan palms, Roses and Bougainvilleas

Special structures of plant that support plantss

Blue pea plants and Morning glory

Twining stem

Special structures of plant that support plants

Orchid and Pepper plants

Aerial clasping roots

Special structures of plant that support plants

Casuarina and Flame-of-the-Forest

Buttress roots

Special structures of plant that support plants

Passion fruit, cucumber, gourd and pumpkin

Tendrils

Special structures of plant that support plants

Money plant

Clasping roots

Special structures of plant that support plants

Mangroves

Breathing roots

Special structures of plant that support plants

Banyan

Prop roots

Support system of aquatic plants

1.Examples of aquatic plants are hydrilla, vallis neria, lotus, and water lily.

2. (a) Aquatic plants stand erect in water because they are supported by the upthrust of the water (buoyancy of water).(b) This can be demonstrated by the activity below.

Support system of aquatic plants

3. The stem of an aquatic plant is filled with air spaces, which make the plant very light for its volume.

4. The upthrust of the water on the plant is greater than the weight of the plant itself.

Support system of aquatic plants

5. Other characteristic of aquatic plants include the following:

(a)They have little strengthening tissue as water give them buoyancy.

(b)They have finely-divided leaves in order to offer little resistance to water currents.

(c) They have very few roots to absorb water as water is everywhere.

(d)Aquatic plants which float on water have very large leaves. e.g: lotus and water lily

HYDRILLA

Hydrilla is a submerged aquatic plant.

The buoyancy of water keeps Hydrilla upright in water.

Hydrilla has small leaves and soft stem that do not resist water flow.

This helps the leaves to avoid being damaged by running water.

Click icon to add pictureHYDRILLA

Hydrilla

WATER HYACINTH

Water hyacinth is a free-floating aquatic plant.

The air sacs in the leaf stalks of water hyacinth help the plant to float on the surface of water.

WATER HYACINTH

Water Hyacinth

LOTUS

The air spaces in the stem and the leaves of the lotus plant help the plant to keep its leaves and flower afloat.

LOTUS

Lotus

Air Sac

The brown alga is common on rocky shores. It is alternately exposed and covered by the tides every day. This alga has air sacs for support because the air sacs provide buoyancy