Explain about cytokinins.
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Answered by
8
Hi.
here is your answer. .
● Cytokinins are the substance which stimulate cell division. i.e. cytokinsis, therefore called cytokinins.
● Skoog and miller 1955 discover substance which stimulate cell division while working on tissue culture in tobacco.
● Cytokinins are the derivatives of a purine nitrogen base called adenine.
● These are naturally synthesised by the young plants organ like root tips, leaves etc. where active cell division occurs.
● Coconut milk is a rich source of cytokinins.
● Cytokinins induced cell division. Along with auxin it can induced cell division permanen cell.
●During callus formation, cytokinins and auxin accelerate the rate of mitosis.
● A balanced combination of cytokinins and auxin is useful for inducing organogenisis. More auxin than cytokinins initiate rhizogenesis and relatively less auxin initiate caulogenesis .
● Chloroplast formation is also initiated by cytokinins in presence of light.
hope it helps you. ☺
here is your answer. .
● Cytokinins are the substance which stimulate cell division. i.e. cytokinsis, therefore called cytokinins.
● Skoog and miller 1955 discover substance which stimulate cell division while working on tissue culture in tobacco.
● Cytokinins are the derivatives of a purine nitrogen base called adenine.
● These are naturally synthesised by the young plants organ like root tips, leaves etc. where active cell division occurs.
● Coconut milk is a rich source of cytokinins.
● Cytokinins induced cell division. Along with auxin it can induced cell division permanen cell.
●During callus formation, cytokinins and auxin accelerate the rate of mitosis.
● A balanced combination of cytokinins and auxin is useful for inducing organogenisis. More auxin than cytokinins initiate rhizogenesis and relatively less auxin initiate caulogenesis .
● Chloroplast formation is also initiated by cytokinins in presence of light.
hope it helps you. ☺
Answered by
2
Hey !!
- Cytokinins are known to promote cytokinesis (cell division).
- Kinetin was first isolated from degraded sample of DNA.
- Zeatin is the first natural cytokinin isolated from maize endosperm.
- Cytokinins are synthesised in roots as well as stems.
- It is responsible for cell division, cell enlargement prevention of senescence (Richmond Lang effect) and enzyme synthesis.
- Auxin-cytokinins ratio causes root-shoot initiation.
- Cytokinins also promote flowering in short day plant.
GOOD LUCK !!
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