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.
Define drug effects on food intake - Causes Taste Changes? Several drugs can cause an alteration in taste sensation, reduced acuity of taste sensation or leave an unpleasant af
A solute passes from higher concentration on the left of a container to the right side of container thru a membrane. What would happen if a second solute of lower concentration was
What is Centrioles in cell structure? Most cells of higher organisms contain pairs of cylindrical bodies called centrioles, which help to organize microtubules in cell division
Q. What are the functional divisions of the nervous system? Functionally the nervous system can be divided into the visceral nervous system and somatic nervous system. The s
What characteristics might a breeder select for in (i) a cereal crop, (ii) a farm animal? (i) In a cereal variety, a breeder might select for high yield; disease-, frost- or dr
Medication delivered in the form of a pill contains an active ingredient or ingredients. Beside the drug itself, the pill also contains "fillers". The filler has several functions.
define respiration in diffrent types of animals
The basic parts of RNA are the same than for DNA with two major differences. The pyrimidyne base uracil exchange thymine and ribose replace deoxyribose see the sugar, pyrimidines a
Categorisation of Major Brain Functions As a framework, the major brain functions typically divided into modalities and domains. The major modalities are motor function and th
A cell with a euploid number of chromosomes contains: A.one half of a complete set of chromosomes B.several complete sets of chromosomes C.the correct number of chromosomes D.two c
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