Caruncle - seed appendages, Biology

Caruncle - Seed Appendages

This is a white, collar-like structure borne on the micropylar end of the seed in many members of the Euphorbiaceae, such as castor, Ricinus communis. The soft outgrowth capping the hard seed is formed by proliferation of the cells at the tip of the outer integument. It is rich in starch and sugars. The violent opening of the fruit (this is termed gun-shot mechanism) causes seeds to be thrown away a few feet. It is believed that ants consume the caruncle and in the process carry the seed further away. The caruncle is also considered to be hygroscopic and it may be helpful in absorbing moisture for seed germination.

Posted Date: 1/23/2013 8:08:15 AM | Location : United States







Related Discussions:- Caruncle - seed appendages, Assignment Help, Ask Question on Caruncle - seed appendages, Get Answer, Expert's Help, Caruncle - seed appendages Discussions

Write discussion on Caruncle - seed appendages
Your posts are moderated
Related Questions
List out the Different Preservation Techniques? The different preservation techniques commonly used today are given in the Table. Table: Methods of food preservation a)

Marine oils These oils typically contain large amounts of long - chain omega-3-polyunsaturated fatty acids, with up to six double bonds and they are usually rich in vitamins A

Define Nutritional Requirements of Fats and Oils for Adults? A desirable amount of a linoleic acid to be consumed by a normal adult is 3 en% (ICMR, 1990). The invisible fat pre


Explain the Ecological niche modelling? The geographic range of organisms frequently reflects their fundamental niche, the range of physical conditions where they can live. Qua

Determinants of Health Status The linkage between economic development and health was discussed in the previous unit. The present unit deals with an identification of the factor

State the term - Functional neuroanatomy Functional neuroanatomy focuses on the study of anatomy using psychological measures. One application of this kind of research is to he

The process of fatty acid elongation is similar to fatty acid synthesis as it also requires both: -malonyl CoA and NADPH -malonyl CoA and NADH -Acetyl CoA and NADH

Q. What is the parasite that causes giardiasis? How is it transmitted and what are the typical manifestations of the disease? The Giardiasis is a protozoal infection caused by

What are the physical properties of Tear Film? Physical Properties of Tear Film: The tear film is a three-layered structure as given below: 1) Outermost Layer: Lipid Layer