Endothelium - ovule, Biology

Assignment Help:

Endothelium - Ovule

In plants bearing unitegmic ovules, the nucellus degenerates during early stages of ovule development and the embryo sac comes in contact with the innermost layer of the integument. The cells of this layer become specialised to supply nutrients to the embryo sac. These cells elongate radially, their cytoplasm becomes dense and store starch and lipids. This specialised layer is called endothelium. Endothelium is also reported in some bitegmic ovules. Tapetal cells are similar to endothelium cells of anther in storing carbohydrates, proteins, RNA, ascorbic acid and other metabolites; it is secretory in function is hence referred to as the integumentary tapetum.


Related Discussions:- Endothelium - ovule

Describe effects on the urinary system, Describe the effects on the urinary...

Describe the effects on the urinary system of drinking too much beer.

Major metabolic gases transported by the blood, Q. Which are the two major ...

Q. Which are the two major metabolic gases transported by the blood? The major metabolic gases transported by the blood are molecular carbon dioxide (CO 2 ) and oxygen (O 2 ).

What is moderate level of lactase activity, Q. What is Moderate level of La...

Q. What is Moderate level of Lactase activity? Intake of milk is restricted depending on the tolerance. Fermented and cooked form of milk should be preferred as it is better to

What is katal, What is katal katal : the amount of  enzyme that  tran...

What is katal katal : the amount of  enzyme that  transforms  1 mol  of substrate into product in one second.

What is meant by the peripheral nervous system, Q. What is meant by the per...

Q. What is meant by the peripheral nervous system (PNS)? The peripheral nervous system comprehends the ganglia and nerves of the body.

Odyssey, how does odysseus get the dead to talk to him?

how does odysseus get the dead to talk to him?

Vertebrate, Basic characters of vertebrate classes

Basic characters of vertebrate classes

Stomata - water loss, Stomata - Water Loss The cross-section of a leaf...

Stomata - Water Loss The cross-section of a leaf shown in Figure shows the position of a typical stoma (plural stomata) which however, differs from species to species, with re

Reproductive cycle - human development, Reproductive Cycle The whole r...

Reproductive Cycle The whole reproductive cycle consists of an ovarian cycle and a uterine cycle. Figure illustrates one complete reproductive cycle. You can observe in the fi

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd