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

What is the thermopenetration concept, What is the thermopenetration concep...

What is the thermopenetration concept? The pasteurization of products packed in glass containers leads to a problem of a specific nature, which is referred to as 'thermopenetra

Pulse wave doppler, Pulse wave  transducer has one Doppler  crystal. This c...

Pulse wave  transducer has one Doppler  crystal. This crystal emits a short burst of ultrasound at a certain frequency [PULSE REPETITION FREQUENCY (PRF)].  The ultrasqund is reflec

What is mendelian genetics, What is Mendelian Genetics? Mendelian Gene...

What is Mendelian Genetics? Mendelian Genetics :  In 1868, an Austrian monk, Gregor Mendel, first published the basics of a study we now call Mendelian genetics. Mendel obser

What is the function of the umbilical cord, What is the function of the umb...

What is the function of the umbilical cord? The umbilical cord haves blood vessels which convey blood among the fetus and the placenta.

Explain penicillin allergy, Penicillin allergy Cefazolin is often used ...

Penicillin allergy Cefazolin is often used for prophylaxis in penicillin-allergic patients, but such patients rarely may have allergic reactions to cephalosporins. When allergy

Heteroduplex dna, Heteroduplex Dna  is generated by the base pairing betwee...

Heteroduplex Dna  is generated by the base pairing between complementary single strands derived from the different parental duplex molecules; heteroduplex DNA molecules occuring du

Sex-limited traits, can u show the different activities on the topic

can u show the different activities on the topic

Acute complications of diabetes, Q. Show Acute Complications of Diabetes? ...

Q. Show Acute Complications of Diabetes? Acute complications of diabetes include: Hypoglycemia or low blood sugar: The most frequent cause of low blood sugar is poor timing

Explain about derived proteins, Derived Proteins These are not naturall...

Derived Proteins These are not naturally occurring proteins and are obtained from simple proteins by the action of enzymes and chemical agents, heat, mechanical shaking, UV or

Contrast the reproduction of bacteria with that of frogs, Contrast the repr...

Contrast the reproduction of bacteria with that of frogs. Bacteria replicate asexually by splitting in two. Frogs reproduce sexually by producing sperm and eggs. One sperm and

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