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.
i want mechanism
Explain the various types of Protein Structure? Protein Structure : The structure of proteins can be examined at four levels of increasing complexity, with the primary struc
Describe Paradoxical and Reverse Split S in second heart sound? Sequence of seminar valve closure reversed i.e. P, proceeds A. A reversed split is nearly always due to delayed
Does thermal inversion occur in the winter or in the summer? Pollutant low altitude thermal inversion happens in the winter. In this period of the year the sun heats the soil l
Explain what is Organismal Ecology? Ecology at the Level of Individuals: We define ecology as the study of the relationships between organisms and the relationships between o
A few statements about the mechanism of evolution are made. Mark the correct statements. (i) Evolution happens at the individual level as well as population level. (ii
General guidelines for use of BONE GRAFTING 1. The surgical site should be prepared, that is it should be free of granulation tissue. 2. For autogenous grafts- the donor sit
Aid-giving behaviour between genetically related individuals in animal groups is often observed in nature. This aid-giving behaviour can evolve when the advantages of helping relat
A human is better able to ride a bike because individual neurons communicate information faster than modern computer chips. true or false
Q. What is Oral Rehydration Therapy? Oral Rehydration Therapy (ORT) refers to providing fluids and/or oral rehydration salt solutions to the patient. An oral rehydration soluti
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