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!
Biochemical Changes
Many workers have tried to follow the biochemical changes that precede flowering and result in meristems which give rise to flowers instead of vegetative structures. In Pharbitis, which is a short-day plant and requires only one dark period for flowering it was found that soon after the dark period, the flowering stimulus begins to move out of the leaves. In this experiment, the plant was given inductive conditions and after specific time intervals, biochemical changes were measured in meristems. An increase in metabolic activity around 40th hour at the floral apex was manifested by an increase in the level of RNA, proteins and ribosomes. Electron microscopic observations also revealed extensive formation of endoplasmic reticulum.
These activities were followed by an increase in DNA synthesis and mitotic activity. At about 88th hour after floral induction, the rate of cell division increased at apical and axillary meristems and the increase in cell division was noticed particularly in the central zone and peripheral zones of apical meristems. Such experiments have also been done in other plants. However, it has not been possible yet to identify which of the RNA or proteins are responsible for the onset of flowering. With the application of newer techniques it has been possible to suggest that there are some specific flowering genes which get switch on after receiving specific light-dark cycle. Although we do not know the products of all these genes, some of them have been shown to code for proteins which regulate transcription.
two inorganinc salts found in the body
Into which subphyla are the protochordates divided? What are some representatives of each protochordate subphylum? Urochordates (or tunicates) and cephalochordates are the two
What is cloning? The Cloning is the making of an organism genetically identical to another by means of genetic engineering. The foundation of cloning is the nucleus transpla
Rat physical characteristics
Q. Explain about gamma diversity? Gamma (g) richness refers to the rate of change across larger landscape gradients and gamma diversity is a measure of the overall diversity fo
What is Coarctation of Aorta ? More common in males (3:l). Narrowing of aorta typically located near aortic attachment of ligamenturn arteriosum or PDA. It can be a localized
Susceptible Organisms When infection proves to be caused by a fully susceptible strain of TB, the initial phase of treatment should include isoniazid, rifampin and pyrazinamid
Q Comparing toxicity and the need for dilution in water how different are the uricotelic and ureotelic excretions? What are some examples of animals that present these respective t
what major nerve do you think is being compressed when a person often feel pain in the posterior surface of the thigh radiating to the area behind the knee and where is the likely
Q. Explain about Gastric ulcers? Gastric ulcers occur in the lesser curvature of the antrum of stomach. A gastric ulcer appears to be caused by reflux of bile and factors that
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