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.
Explain Pregnancy and Diabetes Mellitus? During pregnancy, a woman who has pre-existing chronic disease requires special care, especially in case of mother's suffering from dia
what is the biological significance of the skeleton and supporting system in animals
How does the contraceptive diaphragm work? What are the limitations of this contraceptive method? The contraceptive diaphragm is an artifact made of latex or plastic that when
Dispersal of Seeds A plant usually bears many fruits and innumerable seeds. If all the seeds produced by a plant were to germinate in the immediate vicinity, this will have s
A COMPLETE SEMINAR TALK FOR CORAL REEF
Minerals :- Potassium Food Source Fruits, vegetables, meats Nutritional Functional role Essential nutrient: Deficiency is rare. Salt substitute: KCl may be
In eukaryotes, the electron transport and oxidative phosphorylation occurs in the inner membrane of mitochondria. These processes re-oxidize the FADH 2 and NADH which comes
Q. Fluids requirement during congestive cardiac failure? Fluids: Fluid intake should be monitored in accordance with urine output and severity of oedema. Fluid restriction is
Determine Nutritional Requirements for High Altitude? High terrestrial altitudes and mountains have aroused great fascination and cham for mankind. Every year millions of peopl
Hydrocele A hydrocele is a painless water-filled cyst found in front of the testis.It is brightly translucent and cannot be emptied by pressure of a 'flap valve' at its jun
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