Caryopsis - development of fruit, Biology

Caryopsis - Development of Fruit

In cereals each carpel has one ovule and therefore the mature fruit has, just one seed. During maturation, very little or no cell divisions are necessary in the ovary wall. The pericarp and the remains of the integuments of the seed get completely fused. In wheat caryopsis three main regions can be distinguished:

  1. The caryopsis wall which includes the pericarp, seed coat and remains of nucellus;
  2. Endosperm;
  3. Embryo.

The pericarp can be distinguished into five layers:

  1. Epidermis;
  2. Hypodermis;
  3. Zone of thin-walled cells;
  4. Cross cells;
  5. Tube cells.

The outer epidermis and hypodermis together form the exocarp, having thick-walled compressed cells. Inside the exocarp are one or a few layers of thin-walled parenchymatous cells. These are followed by the cross cells that have thick walls with characteristic pits elongated transversely to the cell. The tube cells constitute the inner epidermis of the pericarp. These cells have thinner walls than cross cells but these too are pitted. In the mature caryopsis testa is destroyed but tegmen is discernible along with one or two layers of nucellus.

Posted Date: 1/23/2013 8:16:01 AM | Location : United States







Related Discussions:- Caryopsis - development of fruit, Assignment Help, Ask Question on Caryopsis - development of fruit, Get Answer, Expert's Help, Caryopsis - development of fruit Discussions

Write discussion on Caryopsis - development of fruit
Your posts are moderated
Related Questions
What is the plant transpiration? What are the two major types of plant transpiration process? Which of them is more important in volume? The Plant Transpiration is the loss of

ARTIFICIAL INSEMINATION - Artificial insemination is a technique to make a female pregnant by artificially introducing semen into the vagina. Artificial insemination has

Life cycle of Parasite - Protozoan The life cycle of the parasite in man begins when an infected mosquito, while biting and taking a blood meal, injects sporozoites into the

osmoregulation in non chordates

Disorders associated with copulation and ejaculation Lack of libido refers to too long “reaction time” to complete absence of sexual desire for females in standing heat. The i

Hypodermic-Subcutaneous Injection By this route the drug is mainly absorbed into the blood stream by way of the lymphatic drainage. Absorption is slower by this route

classifcation of protozoans

Fumonisins The most recently characterized mycotoxins of any major significance in human health are the fumonisins produced by species of Fusarium, such as F. moniliforme. Like

This is the amount of blood that is returned to the heart by the veins. This is influenced by various factors. Inspiration decreases the pressure in the  central veins and thus inc

Q. Define Low - density lipoprotein? Ans. LDL is the major cholesterol-rich lipoprotein carrying approximately 70 per cent of plasma cholesterol. It serves to transport ch