Write a note on agents of pollination .

Explanation

Cross pollination takes place through the agency of animals insects , wind and water .
Pollination by word ( Anemophily
(i) The pollination with the help of wind is called anemophily .
(ii) the anemophilous flowers produce enormous amount of pollen grains .
(iii) the pollen grains are small , smoth , dry and light in weight .
(iv ) the stiruding are sometimes hairy , to trap the pollen grains E.g Grasses and some cacti .
Pollination by insects (entromophily ) :
(i) Pollination with the help of insects like honey bees , files are called entomophily .
(ii) To pollen grains are larger in size , the exine is pitted , spiny etc ., so they can be adhered firmly on the sticky stigma .
(iv ) Approximately 80% of the pollination done by the insects is carried by honey beees.
Pollination by water : the pollination with the help of water is called hydrophily , this takes place in aquatic plants .
(i) Pollin grains float on surface of water till they land on the stigma of female flowers. E.g Hydrilla vallisneria .
Pollination by animals :
(i) WHen pollination takes place with the help of animals , it is called Zoophily .
(ii) Flowers of such plants attract animals by their bright color , size , scent etc. E.g : sun bird pollinates flowers of conna . Gladioli etc ., Squirrels pollinate flowers of silk cotton tree .