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!
Endosperm - Pollen Biology
The examination of live material of j. montana reveals that the division of the primary endosperm nucleus is transverse, followed by the laying down a wall. The chalazal chamber divides by a vertical wall. The elongated tubular zygote is 60-80 pm long, and the growth rate is 5-6 pm per hour. The mitotic cycle of the endosperm nuclei is short as compared to that in somatic cells. It is also possible to analyses the rhythm of development of endosperm and embryo during the initial few stages. The information would help in finding out ways to prevent embryo abortion in distant hybridization. Enzymological studies on endosperm during development point out variable activities of different enzymes. Free-nucleate endosperm cells of Lilium regale show high activity of 6-PGDH and G6PDH until cellularization process begins.
The most active period of nitrogen accumulation in maize coincides with a rapid increase in glutamate synthase. Even differences between the normal and opaque-2 maize endosperm can be marked by analyzing isoenzyme profiles. At day 15, the normal endosperm shows proteases I and II, whereas, opaque-2 exhibits only I at both the ages. The localisation of three isoenzymes of G6PDH in the plastids and one in cytosol of developing castor endosperm reflects that young castor endosperm is the seat of both, glycolytic and pentose phosphate pathways. The embryo-endosperm relationship and the role of endosperm during seed development is an important aspect needing further attention.
Sporogenous Tissue The primary sporogenous cells (PSCs) result after the periclinal division of the archesporial cells. The PSCs may undergo mitotic divisions and increase in
Q. Why are vaccines made of the own disease agent or of fragments of it? The goal of vaccines is to artificially induce a specific primary immune response (and the consequent f
What are the results of Atrial Septal Defect ? Mortality for ASD closure has approached 0 per cent in most cardiac surgery centers. Late survival of patients who has ASD closu
according to the graph,which age is the amount og growth hormone produced at its highest?
Food Habits Food Habits: These must be known so that the diets can be recommended keeping in mind the food preferences of the patient. Whether a person is a vegetarian
Disorders of motor neurons and the spinal cord A number of movement disorders are produced by damage either to the spinal cord or to cortical projections to the spinal cord. Th
get answer
What are the noteworthy features of the nervous system of arthropods? In arthropods the nervous system has more complicated sensory receptors with well-advanced cephalization.
Q. What do you understand by Pericardium? Pericardium is the covering sac of the heart. The pericardium prevents acute cardiac chamber dilatation. Acute pericarditis, pericardi
what are the unit for restriction enzyme activity?
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