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 do ATP and ADP mean? What are the roles of these molecules for the cellular energetic metabolism? ATP is an abbreviation of adenosine triphosphate, a molecule made of aden
Carbohydrate - contains Carbon , Hydrogen , and Oxygen with a general formula of C x (H 2 O) y Simple sugars à monosaccharides Oligosaccharide à sugars containing
Explain the taxonomy of Lamarck? Lamarck's taxonomy was mainly static in nature and his classification does not show its true value to the development of modern taxonomy. His m
Explain Indications of Root-End Filling (REF) Retrofilling a. Persistent periapical pathosis resulting from an inadequate apical seal that cannot be corrected nonsurgically,
rRNA structure and synthesis assignment
Cell cycle Urgent question?? please biology expert! it''s for an exam? When M-Cdk gets attached to cyclin, it doesn''t just get activated. phosphate has to be added by an activatin
Q. What are the hormones secreted by the thyroid gland? What are their functions? The thyroid secretes the triiodothyronine (T3), hormones thyroxine (T4) and calcitonin. T3
ENZYME INHIBITION Enzymes are often inhibited by the presence of suitable inhibitors. Much of current drug therapy is based on this. Basically, there are three major cla
Subphylum Opalinata Body covered with longitudinal rows of cilium like ,organelles but true ciliature absent. Parasitic; cytosome lacking; two to many nuclei of one type.
Evolutionary changes that occurred in humans are - Development of prominent chin. Increase in cranial capacity. Reduction of brow-ridges. Development of speech. Developme
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