Nutrition of embryo sac, Biology

Nutrition of Embryo Sac

The morphology of the ovule suggests that the chalazal end is the main route for the entry of nutrients. The funicular vascular supply ends at the base of the integuments. The nutrients reach the embryo sac via nucellus; often a patch of specialised tissue called hypostase is present in between the funicular vascular supply and the chalazal end of the embryo sac.

The hypostase is also presumed to have a role in nutrition supply. In some cases the nucellar tissue is completely consumed during the development of the embryo sac. The inner integument becomes a glandular endothelium, and absorbs nutrients from outer tissues and supplies them to the embryo sac. Because of its structural and functional similarity to anther tapetum the endothelium is also called integumentary tapetum.

 

 

Posted Date: 1/23/2013 2:04:46 AM | Location : United States







Related Discussions:- Nutrition of embryo sac, Assignment Help, Ask Question on Nutrition of embryo sac, Get Answer, Expert's Help, Nutrition of embryo sac Discussions

Write discussion on Nutrition of embryo sac
Your posts are moderated
Related Questions
Casein is the main protein in milk. There are three types of casein, one of which is beta casein. Beta casein comes in two main variants called A1 and A2. The order of amino acids

What are universal donors and universal recipients concerning the ABO blood system? The Universals donors of the ABO blood type system are the individuals of the type O. The Ty

Q. What is the name of the molecule that transports oxygen in red blood cells? The respiratory pigment of the red blood cells is hemoglobin.

Factors that affects Oxygen Dissociation Curves Oxygen dissociation curve for a sample of blood is affected by several factors. The most important of them are: Te

Cu r in g and Smoking Meat curing refers to the production of the characteristic thermally stable pink meat pigment and cured meat flavour by the action of sodium nitrite an

Find the electric potential, taking zero at infinity, at the upper right corner (the corner without a charge) of the rectangle in the figure. (Let y = 3.7 cm and x = 6.7 cm.)

How do calcium ions participate in muscle contraction? Why do both muscle contraction and muscle relaxation spend energy? In the muscle cells calcium ions are kept within the s

What is Protein Synthesis? Protein Synthesis :  Protein synthesis begins in the nucleus, with the formation of mRNA from a DNA template through transcription. The function of

Q What are the nitrogen wastes? Nitrogen wastes are residuals derived from the degradation of proteins and they are made from chemical transformation of the amine group of amin

How to calculate the raw score for each scale The raw score for each scale is the sum of the 0, 1 and 2 item scores. Thus, the higher the score, the poorer the performance. Th