Home » Ask & Discuss » Biology (for Medical Entrance) » Botany « Back to Discussion

Botany

New kid on the Block

Joined:	8 May 2010
Post:	3

8 May 2010 11:39:41 IST

0 People liked this

368

what is tapetum

None

what is tapetum

Share this article on:

Comments (3)

sahell... jipmer 5

Blazing goIITian

Joined: 20 Mar 2010

Posts: 998

8 May 2010 17:07:32 IST

Like 0 people liked this

The Tapetum is a layer of cells that is found within the pollen sac, a nutritive tissue within the sporangium, particularly within the anther. Tapetum is important for the development of pollen grains. The cells are usually bigger and normally have 2 nuclei per cell (polyploid). It helps in pollenwall formation, transportation of nutrients to inner side of anther, synthesis of callase enzyme for separation of microspore tetrads. The secrete pollenkit, which is teh insect attractant and als have Ubisch bodies which coat the pollen with sporopollenin to prevent its dessication and any reaction.

krishna vegiraju

Cool goIITian

Joined: 19 Feb 2010

Posts: 46

11 May 2010 21:42:05 IST

Like 0 people liked this

tapetum provides nourishment to the developing microspoe mother cells.by the time anther dehisces it is completely utilised.so it indirectly helps in dehiscens also.

Juhi Sharma

Forum Expert

Joined: 22 May 2009

Posts: 2064

31 Jan 2011 16:52:36 IST

Like 0 people liked this

tapetum In many nocturnal mammals, a layer of cells either in the retina or outside it,

in the choroid (e.g. in cats), which contain crystals of zinc and a protein (often riboflavin,

which fluoresces). The tapetum reflects light back through the retina and so increases the

sensitivity of the eye to dim light. At night, when the pupil is fully dilated, reflected light from the tapetum

will cause ‘night shine’ if the animal turns to look in the direction of a sudden bright light (e.g. car headlights) !!!!!

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team