The Grange Biology Forum

An open forum for members of the Grange Biology community to exchange ideas and information
 
HomeCalendarFAQSearchMemberlistUsergroupsRegisterLog in

Share | 
 

 Seed Dispersal

View previous topic View next topic Go down 
Go to page : Previous  1, 2
AuthorMessage
Benja Blas



Posts : 3
Join date : 2010-08-05

PostSubject: Re: Seed Dispersal   Thu Oct 28, 2010 5:14 pm

Seeds disperse, getting out of the flower and travel to different places of the world so the flower specie gets to different places. They are many different ways in which this can occur.
-The first one is by wind, some plants are light enough to get carried away and land as far as they can.
-Some other seeds can float over water because they are resistant to water.
-Another seeds can resist digestive juices a animal has, this happens because the animal eats the fruit with the seed included and later excretes the seeds.
-A very strange method is by explosive mechanism, this time the plant burst open throwing seeds everywhere.
-My weird kind of seed dispersal is the shaking method, with this method when wind hits the plant, shaking it, the plant drop little seeds out of the top through little holes.
Information taken from http://www2.bgfl.org/bgfl2/custom/resources_ftp/client_ftp/ks2/science/plants_pt2/dispersal.htm
Back to top Go down
View user profile
sachigl



Posts : 2
Join date : 2010-08-12

PostSubject: Seeds Dispersal   Thu Oct 28, 2010 11:35 pm

One of the important functions of seeds is dispersal; which is a mechanism to establish the seeds in a suitable place away from their parental plants.
Nearly all seeds are produced within fruits. These fruits enable seeds to be dispersed in a variety of ways;
the first one is by wind; some seeds are adapted to catching the wind and being blown away such as sycamore or dandelion.
By an explosive mechanism; these seeds suddenly open throwing the seeds in all directions, such as peas, laburnum or gorse.
By water; some seeds are waterproof and can float. For example, coconuts.
Another good example of seed dispersal is by animals. Lots of fruits are really tasty to animals (and humans), such as blackberries, apples and gooseberries. When an animal eats these fruits the little seeds are not digested and pass through the animal defecation.

SUNFLOWER SEEDS
Sunflower seeds could be dispersed by wind, they form structures that resemble tiny parachutes. The upper portion of the parachute, called the pappus, resembles hair and is very lightweight. A stem attaches to the pappus, and at the bottom of the stem is the seed of the sunflower. Wind catches the pappus and lifts the seed from the plant and into the air current. Some types of sunflowers do not form pappus structures. These are transported most commonly by birds or animals who disrupt the seed from its position on the plant, intentionally or unintentionally. Seeds also could fall on the ground and can be kicked around by people and wildlife, or transferred when the dirt around the plant is transferred, such as during landscaping.

Sunflower seeds are particularly popular in Mediterranean and Asian countries, like Syria, Israel, Turkey, and Malaysia, and also in countries worldwide like Russia, Ukraine, Bulgaria, Romania, Spain, China, Iran, Canada, and the United States.



González 1ºD cyclops
Back to top Go down
View user profile
 
Seed Dispersal
View previous topic View next topic Back to top 
Page 2 of 2Go to page : Previous  1, 2
 Similar topics
-
» ESTABLISHMENT OF SEED PRODUCTION AREA (SPA) INDIVIDUAL PLUS (IPT'S)
» ESTABLISHMENT OF SEED PRODUCTION AREA (SPA)/Individual Plus Tree (IPT's)
» Lemurian Seed Crystal
» The Growing Seed (Surah 48:29)
» Mingling with the Seed of Men....

Permissions in this forum:You cannot reply to topics in this forum
The Grange Biology Forum :: PAULA DE LA MAZA :: 1st Medio :: Seed Dispersal (PMA)-
Jump to: