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 are the Body Fat Measurements? Obesity is best classified in adults based on Body Mass Index (BMI) classification. BMI, you already know, is a measure of body jut based on
ENERG Y TRANSFORMATION - During photosynthesis radiant energy is converted into chemical energy by green plants. In biluminiscent organisms .e.g glow worm, noctilluca &
Implant failures On the basis of the stage when problems occurs implant failures can be classified as : i) Before Abutment Connection. ii) During Abutment Connection.
Define Placental secretion of oestrogens During pregnancy? Placental secretion of oestrogens increase with progression of pregnancy. Oestrogens perform many functions. They sti
A haploid cell contains: A.one half of a complete set of chromosomes B.several complete sets of chromosomes C.the correct number of chromosomes D.two complete sets of chromosomes E
Q. What is the physiological cause of the syndrome Called as cretinism? Cretinism is caused by chronic deficiency of the thyroid hormones (T4and T3) during childhood. The chron
Explain Adverse effects of Stavudine Fatal lactic acidosis may happen more frequently with stavudine than with other NRTIs. Serum aminotransferase activity may enhance with sta
Q. Concerning their biological function what is the difference between DNA and RNA? DNA is the source of information for RNA production (transcription) and thus for protein syn
which area of the basal nuclei is responsible for controlling appendicular muscle tone?
Dextran Dextran is a high molecular weight polysaccharide having α1→ 6, α1→ 3 linked glucans. It is produced by the bacterial fermentation of sucrose by Leuconostoc dextran
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