Aril - seed appendages, Biology

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.

Posted Date: 1/23/2013 8:07:54 AM | Location : United States







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

Write discussion on Aril - seed appendages
Your posts are moderated
Related Questions
Define Petri Plates - Food Microbiology? Petri plates were discovered by Richard Petri in Ninteenth century (1887). It consists of two dishes. Look at the Figure which illustra

The structure of moulds When the four pure cultures of mould have reached a vigorous state of growth study each one with a hand lens. See if you can see stalks with tiny black

Q. What is the cellular regeneration? How is the mitosis related to this process? Some tissues are capable to regenerate when injured. The liver, for instance, regenerates when

Q. Etiological factors involved in short bowel syndrome? The etiological factors involved in this disease are: • Anaemia • Osteoporosis • Stone formation • Decrease

cranial and spinal nerves account of rana tigrina

How is the responsible slromal swelling pressure for corneal hydration? Slromal Swelling Pressure Stromal Swelling Pressure (SSP) is the pressure exerted by GAG (Glycosa

Q. List the tissues of pancreas? The pancreas is made up of two types of tissue: The exocrine tissue secretes digestive enzymes. These enzymes are secreted into a network of

WHY CONSERVE WILD LIFE ? 1 .       ECONOMIC IMPORTANCE OF WILD LIFE - (i) Plants - (ii) Animals - (iii) Micro organisms - 2 .       ECOLOGICAL BALANCE -

What is Thermoregulation in Cold? Heat production parallels the increase in O 2 uptake, the magnitude of which depends on the muscle mass .engaged in slivering or work and the

Determine the parts of plant source The natural food colourants from plant sources are classified into 5 types: a) Anthocyanins, b) Betalaines, c) Carotenoids, d) C