Seed Dispersal and Seed Dormancy

 

Seed Dispersal :

A) Defination :

• Spread the seeds of plant away from parent plant
• by natural agent, e.g : wind ,water,insect,fruit

B) importance :

1. Reduce intraspecific competition due to overcrowding
2. Allow greater distribution of species to escape from species-species pest
3. Reduce chance of backcrossing will cause inbreeding

Seed Dormancy :

A) Defination :

• State of seed which is very low metabolic rate just to maintain alive , even when favourable condition

B) importance :

1. Length of seed dormancy varies between individual, prevent intraspecific
2. Allow more time for seed dispersal
3. Competition withstand unfavourable condition, e.g: lack of food
4. Allow storage of seeds for human food