Dispersal Agent
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Transcript of Dispersal Agent
SURVIVAL OF PLANTS
•Seed and fruit dispersal•Various ways plants disperse their seeds and fruits
Seed and Fruit Dispersal
• Plants cannot move freely
• Need to disperse seeds and fruits away from parent plants
• Scattering far away from parent plants
Advantages of Seed and Fruit Dispersal
Reduces competition
Reduces overcrowding
Plants grow healthily
New localities
Dispersal Methods
• Seeds and fruits have special characteristics which help dispersal agent to disperse the seeds.
• Seeds and fruits can be dispersed by
Dispersal Agent - WaterCharacteristics :
• Plants live near seas, rivers and marshes
• Fruit has waxy and waterproof coverings – prevent water from entering the fruits
• Air spaces – enable fruits to float in water
• Husk – can trap air
Dispersal Agent - Water
Pong-pong Pinang fruit
Coconut Lotus
Dispersal Agent - WindCharacteristics :
• Small
• Light
• Dry
• Wing-like structure
• Fine hairs
Dispersal Agent - Wind
Shorea Angsana
Coconut Dandelion
Dispersal Agent - Animal*Eat the fruits but discard the seeds*
Characteristics :
• Big seeds
• Brightly coloured fruit
• Fragrant
• Fleshy friuts
• Edible
Dispersal Agent - Animal*Eat the fruits as well as seeds and pass out the seeds in
the faeces*
Characteristics :
• Small hard seeds
• Brightly coloured fruit
• Fragrant
• Fleshy fruits
• Edible
Dispersal Agent - Animal*Transport fruits that stick to the body of the animals*
Characteristics :
• Dry
• Have hooks
• Light
• Have spines
• Not edible
Dispersal Method- Explosive Mechanism
Characteristics :
• Dry and hard when ripe
• When matured, the fruit wall will split and curl suddenly, throwing the seeds out.
Dispersal Method – Explosive Mechanism
Balsam
Ladies’ finger (okra) Flame of the forest
Rubber seed
• The main function of seeds is to ensure that the plant species continues to exist
• The dispersal of seeds and fruits ensures the survival of the species
QUIZmimosa
balsam
meranti
papaya
Love grass
Water-melon
Rubber seedpinang
orchid
lotus durian lallang
angsana dandelion coconut Guava
urena Pong-pong Okra Flame of the forest