Aril - seed appendages, Biology

Assignment Help:

Aril - Seed Appendages

It is an outgrowth that arises from the funicle or the testa near the raphe and covers the seed partially or completely. It is often referred to as the third integument. It is often fleshy or brightly colored. The edible part of litchi fruit is aril, which envelops the hard brown seed coat. In Myristica fragrans the hard seed (nutmeg of commerce) is covered by a thin, irregular and bright-orange aril (that gives us the precious spice mace). Seeds of Pithecellobium dulce, a leguminous tree, have a fleshy red aril that partially surrounds the seed. In Crossosoma californicum a fimbriate aril covers the seed on the sides.

Cells of the aril contain oils, starch, sugars, pigments and aroma containing compounds. The appendage is mostly an attraction for birds, which consume the aril and scatter the seeds. Seeds of white water lily, Nymphaea Alba have a spongy aril that provides buoyancy for dispersal of seed by water.


Related Discussions:- Aril - seed appendages

Myocarditis, Myocarditis Myocarditis is inflammation of the myocardiu...

Myocarditis Myocarditis is inflammation of the myocardium, of the heart muscles. i) Causes Infection: . Wrus, bacteria, fungus, parasites Non-infection: Radi

What are some prophylactic measures for tapeworm infections, What are some ...

What are some prophylactic measures for tapeworm infections? The main prophylactic measures against taeniasis and cysticercosis are: not to ingest raw or badly cooked swine or

Explain restriction endonucleases are enzymes, Restriction endonucleases ar...

Restriction endonucleases are enzymes which: 1. make cuts at specific positions within the DNA molecule 2. recognize a specific nucleotide sequence for binding of DNA ligase

What is the goal of biological classification, The goals of biological clas...

The goals of biological classification The world of animal diversity is quite complex and it requires an ability to recognise similarities and differences among organisms. Class

Explain working of hypophysis- ovaries endocrine axis, Q. Does the hypophys...

Q. Does the hypophysis- ovaries endocrine axis work in the same way during pregnancy as in non-pregnant women? If pregnancy does not occur how does another menstrual cycle begin?

Vitamins and minerals requirement in diabetes, Q. Vitamins and minerals req...

Q. Vitamins and minerals requirement in diabetes? The recommendation of vitamins and minerals is the same as for general population. However, lower levels of magnesium are ass

Determine the digestion of carbohydrates, How does the pancreatic juice res...

How does the pancreatic juice resume the digestion of carbohydrates? What is the involved enzyme? Carbohydrate digestion starts with the action of the salivary amylase (ptyalin

Determine the occurrence of vitamin A, Determine the Occurrence of vitamin ...

Determine the Occurrence of vitamin A In the vegetable kingdom, vitamin A  probably occurs in the form of its provitamins which belong to the group of carotenes. Carrots, spina

Types of endoplasmic reticulum, TYPES E.R. consists of two types -     ...

TYPES E.R. consists of two types -        1. Rough E.R.                2. Smooth E.R.   R o ugh E.R.   S m o o th E.R.

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 ).

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