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!
Differentiation of Tissues - Root Apex
New cells generated from the divisions of meristematic cells start expanding and differentiating further. Epidermis, cortex and stele are formed. Stele is organized into xylem forming a star shaped central axis with columns of phloem between the points of the star, encircled by the pericycle. But what are the processes that control differentiation? Certain experimental studies involving surgical removal of small portion of root tips and observing their differentiation in culture has thrown much light on root development. Smaller pieces while differentiating produced monoarch and diarch type vascular organisation even though originally the plant root showed triarch pattern. This experiment indicates that a definite size of root tip is needed for realization of its full morphogenetic potential. But on further growth even these small pieces revert back to normal pattern of organisation of vasculature. If auxin at 10-5 M concentrations was provided in the culture exarch vascular tissue was formed. The ontogenic development of the primary vascular system of the root is simple.
The differentiation of the root tissues behind the apical meristems is summarized as follows: Periclinal divisions in the cortex cease near the level where the sieve elements mature: beyond this region the root undergoes rapid elongation and the maturation of the protoxylem usually takes place when the process of elongation is almost completed: Casparian strips develop in the endodermal cells before the maturation of the protoxylem elements and also before the appearance of root hairs. Phytohormones influence the development of secondary vascular tissue. When the roots are cultured on a nutrient medium containing Indole Acetic Acid (10-5 m) along with sucrose can induce secondary vascular tissue. Cytokinins and hexitols in small amounts promote secondary vascular tissue. Roots also depend upon vitamin 'B' for their proper growth.
Annexin V is a protein that binds to Phosphatidylserine. Why is this useful in the lab? Does it have to do with testing whether the cell is in normal condition?
Another type of soil for bacteria gardens Boil some rice or potatoes in a dish unless well cooked. Drain and save the water. Use the bouillon cube to the gelatin. Use th
Activated carbon has a much higher adsorption capacity than other materials. Carbon adsorbs objectionable odours, flavours, organic compounds and many hazardous chemicals. There
Board spectrum antibiotics are effective against several diff. types of harmful bacteria ex: tetracycline
Technique of food processing Freezing is another ancient technique of food processing, which allows the transportation of perishable food items for long distances from producti
Q. Management of Constipation? You must have realized by now that proper dietary and lifestyle management can help in maintaining the normal bowel movements to a great extent.
Acute Glomerulonephritis If you review the anatomy of urinary system you will recall that nephron is the working unit of kidney and its number exists in millions. Within t
Q What are instances of human diseases caused by bacteria? Some human diseases caused by bacteria are tuberculosis, pertussis, diphtheria, gonorrhea, bacterial meningitis, bubo
A species has a diploid chromosome number of 56, WHY is it true that of the 28 chromosomes in an ovum, 14 are always paternal?
Q. To which heart chamber does the blood go after leaving the left atrium? What is the valve that separates these compartments? The valve between the left atrium and the left v
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