Pollenkitt - pollen wall, Biology

Assignment Help:

Pollenkitt - Pollen Wall

The lipoidal layer found on the outside of the mature pollen grains of many insect pollinated species is known as the pollenkitt. In addition to lipids it is made up of flavonoids, carotenoids and degeneration products of tapetal proteins. The carotenoids are responsible for its characteristic yellow or orange color. The function of pollenkitt is not clear. It is believed to act as an insect attractant, help in pollen dispersal and in protecting against the damaging effects of UV rays. Deposition o flavonoids appear important for the nod functioning of pollen. In maize it has been shown that the pollen grains that lack flavonoids are incapable of developing tubes that are effective in fertilization. Lipids also help in checking water loss after anther dehiscence and discharge of pollen.


Related Discussions:- Pollenkitt - pollen wall

Explain about the mucor - fungi, Explain about the Mucor  - Fungi? Muc...

Explain about the Mucor  - Fungi? Mucor is present as a food contaminant. It resembles Rhizopus in life history and colonies appear just like Rhizopus. However, important diffe

Human imapct on the environment, list the long-term and short-term effects ...

list the long-term and short-term effects of forest destruction (a)on hillsides,(b)in the tropics?

How do chloroplasts multiply, How do chloroplasts multiply? Like mitoch...

How do chloroplasts multiply? Like mitochondria chloroplasts have their own DNA, RNA and ribosomes and they self-replicate through binary division.

Define endurance capacity by standard running tests, Define Endurance capac...

Define Endurance capacity by standard running tests? Endurance capacity, on the other hand, is measured by standard running tests in which time to exhaustion is taken as the en

Uses of microbes in industry-antibiotics, Normal 0 false fals...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

What are the frequencies of the s, Platinum color in foxes is produced by h...

Platinum color in foxes is produced by heterozygous genotype Ss, and silver foxes are the genotype SS. The genotype ss is lethal, and the fox dies in early embryonic development. I

How many chambers does the fish heart have, Q. How many chambers does the f...

Q. How many chambers does the fish heart have? The fish heart is a tube made of two consecutive chambers such as one ventricle and one atrium.

Explain about the freeze drying Method, Explain about the freeze drying Met...

Explain about the freeze drying Method? The Techniques of freeze-drying have been developed over the past half-century for the purpose of preserving certain biological material

Define the acute phase of spinal trauma disease, Define the Acute Phase of ...

Define the Acute Phase of spinal trauma Disease? Nutritional support should start within 3-5 days or as early as possible to prevent the onset of malnutrition and secondary il

Bovine rotavirus diarrhoea, B o v i ne rotavirus diarrhoea The bovi...

B o v i ne rotavirus diarrhoea The bovine rotavirus is a RNA virus with 11 segments of double stranded RNA belonging to the genus Rotavirus in the family Reoviridae. Rotavi

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