Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
Is the transpiration the only way through which leaves lose water? The Plants don't only lose water as vapor as by transpiration. Leaves also lose liquid water by a phenomenon
Q. What are the four major groups into which the study of the plants is divided? In Botany the plant kingdom is divided into pteridophytes, bryophytes, angiosperms and gymnospe
Explain Precautions for Estimation of Sucrose by Fehling Soxhlet Method? 1. Maintain proper temperature of the water bath for complete hydrolysis. 2. Add distilled water to
Q. What do you mean by Hypertension? Hypertension is one of the major risk factors for cardiovascular disease. It is the most common public health problem and often referred to
Production of Rare Hybrids Hybridization is a well established plant breeding procedure to obtain superior plants by combining useful characters distributed in different plan
Epidemiology: The study of disease in populations. Includes: The Aetiology of the disease Patterns of distribution of the disease How the disease spread
Apparently. The untwisting, unzipping. Rezipping and retwisting occur sequentially and ensure that each newly formed double helix is exactly like other one. The final result is a p
Respiratory Distress Syndrome: Respiratory distress in a newborn is a challenging problem. It accounts for significant morbidity and mortality. It occurs in 4 to 6 per c
How different are the concepts of action potential, resting potential and excitation threshold concerning neurons? Action potential is the maximum positive voltage level achiev
Constrictive Pericarditis : It is usually the end stage of inflammatory process involving pericardium. In developing world, infection with mycobacterium tuberculosis is still com
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd