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!
Cytokinins - Apical Dominance
Cytokinins are also involved in the regulation of apical dominance. Wickson and Thimann studied the interaction of cytokinins and auxins in controlling the apical dominance. They isolated and cultured pea the stem sections in nutrient media containing auxins and no auxins. In the absence of auxins growth of lateral buds was not prevented. However, if cytokinins were added along with auxins, the inhibition of lateral buds was released. Wickson and Thimann also demonstrated the effect of cytokinins on entire shoots. When the intact shoot was soaked in a solution of kinetin, growth of lateral buds occurred even in the presence of shoot apical buds.
From this observation it was inferred that apical dominance exhibited by the shoot apex was overcome by the application of cytokinins. The present concept is that apical dominance is controlled by a balance between cytokinin and auxin concentrations. Some investigators suggest the possible inhibitory influence of cytokinins on auxin production. The cytokinin application to the lateral buds may inhibit the synthesis of certain forms of IAA oxidase, normally induced by IAA translocated from the terminal bud. With the repression of IAA oxidase, the spared auxin may stimulate lateral bud growth and shoot development. In addition to the possible inhibition of IAA degradation, cytokinins may initiate a sink effect at the site of lateral buds to attract diversion of nutrients from other regions.
What grade did you get in biology?
Define Standard Titration for estimation of reducing sugar by Fehling Soxhlet Method? Pipette 5 ml of Fehling's A and 5 ml of Fehling B solution into a 100 ml conical flask. Ad
Determination of Limb Polarities The limb pattern is characterized by three axes (or polarities) as displayed in diagram: (1) The direction from the shoulder (or hip) to t
Explain the Synthetic and natural materials of suturing 1. Most common are synthetic fibers: nylon, polyester, polyglactin (PG), and polyglycolic acid (PGA). 2. Natural: sil
Q. What are the events that mark the end and the beginning of the second interphase period and what happens in the cell in this period? The second interphase period is the S, i
Taeniasis Taeniasis is a zoonotic disease caused by specific cestodes. The two parasites of major importance are Taenia saginata and T. solium. Both in their adult forms, are
Define Meat as a Rich Source of Protein? Skeletal or striated muscles are used for food purposes. Flesh of cattle, sheep and swine comprise most of the meat contents. Edible me
geographical range graph on minimum and maximum range of tolerance
Define Bioactive Substances from Protein Foods? Bioactive substances are derived from living organisms that can be used by humans for a variety of applications. They are consti
Vitality and Vigour - Qualitative Characters Vitality is related to the condition of a plant and its capacity to complete its life cycle, while vigor refers more specifically
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