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!
Rejection Reaction
For rejection reaction the physiological and biochemical processes are set in the pistil by the recognition reaction specific to the type of pollen that lands on stigma. In contrast to systems where inhibition can occur on stigma itself thus preventing germination of pollen or its entry into style, in GSI system it may occur in style leading to either inhibition of pollen tube growth or its bursting.
The pollen wall and its protein content plays an important role in pollen stigma interaction. Through cytochemical studies it has been observed that the pollen wall is perforated by protoplasmic strands giving the appearance of a living physiological structure playing a very responsible role in the process of interchange between the pollen grain and the substrate. The incorporation of proteinaceous substances in the exine and the intine has been demonstrated by EM studies of the pollen wall during development. A good amount of mobile proteins of the pollen grains is S-gene specific. The recognition proteins of incompatibility are held extra-cellularly in the pollen wall. In GSI plants, these proteins are present in the intine while in SSI plants they occur in the exine.
What is the relation between posterior pituitary gland and diabetes insipidus?
Cell-mediated immunity: The immune reaction directed against the body cells which have been infected by viruses and bacteria; and are controlled by T cells.
Brooke's Formula: a) Fluid requirement b) Estimate the accurate/approximate weight of the patient c) First 24 hours Colloids (blood, plasma, dextran) 0.5 ml
define?
In an adult male, which of the following is true? A. The plasma membranes of Leydig cells contain LH receptors. B. The plasma membranes of Sertoli cells contain FSH receptor
Principles of Isolated soybean proteins The basic principles of ISP production are simple. Soybean protein isolates are obtained by selective solubilisation of the protein (e.
Illustrate the thin and think filaments in the muscle fiber A healthy skeletal muscle fiber is isolated and has no external forces on it. It has normal intracellular levels of
Q. What are the main characteristics of the age pyramids of developed countries? In the stabilized human population the age pyramid has a narrower base since the reproduction r
Biological Stress Since in nature, the various organisms do not live in complete isolation from others, stress to a plant species might also be caused by what other organisms
Explain the Irradiation and its Implication The issues are the decreased salivary flow, liability for infection because of the decreased blood supply and the possibility of ost
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