Tag: cytokinins
Questions Related to cytokinins
Delaying aging of leaves and opening of stomata are due to the action of _______
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Auxins
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Gibberellins
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Cytokinins
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Abscisic acid
Cytokinins are known to
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Inhibit cytoplasmic movement.
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Help in retention of chlorophyll.
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Influence water movement.
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Promote abscission layer formation.
Cytokinins perform several other functions:
- Stimulates cell division.
- Stimulates morphogenesis in tissue culture.
- Stimulates the growth of lateral buds.
- Stimulates leaf expansion.
- Enhance stomatal opening
Cytokinin and ethylene have oppsite effect on:-
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Leaf senescence
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Elogation of stem
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Lateral swelling of stem
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Winter dormancy
Cytokinins are the plant hormones that are responsible for cell division and elongation, their help in the delay of leaf senescence as they transport nutrients to these parts. Ethylene is a gaseous hormone and is responsible for transverse growth as swelling of the stem, It hastens the senescence of leaves due to the evolution of ethylene gas.
Find the correct application of cytokinin.
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Acts as anti-transparent and induces closure of stomata
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To promote root development on various types of cuttings
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In tea plantation for giving bushy appearance
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Promotes parthenocarpy in fruits like banana and grapes
Kinetin was first isolated and identified by
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Charles Darwin
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Boysen and Jansen
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Paal
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Miller
Kinetin is a type of cytokinin, a class of plant hormone that promotes cell division. Kinetin was originally isolated by Miller and Skoog et al., as compound from autoclaved herring sperm DNA that had cell division-promoting activity.
The chief role of CK is
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To check abscission
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To check senescence
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To mobilize solutes
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To check senescence and to mobilize solutes from one part to other
Cytokinin hormone does the major function of checking senescence and mobilising solutes from one part to another. It promotes the cell division or cytokinesis, in plant roots and shoots.
Phytocytomine is a
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Kinetin
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Giberellin
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Auxin
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None of the above
Phytocytomine is a plant growth regulator. It is a kind of kinetin. It is synthesized from Licheniformis bacillus.
Which of the following contains cytokinin?
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Coconut milk
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Young kernels of maize
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Fruit of cucurbits
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Both (A) and (B)
Coconut milk and young kernels of maize contains cytokinin. Cytokinis are a class of plant growth substances that promote cell division, or cytokinesis in plant roots and shoots. It is an adenine derivative.
Cytokinin involves
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Kinetin, zeatin, BAP
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$GA _3$,IBA, Kinetin
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Zeatin, $GA _3$, BAP
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IAA, Zeatin, kinetin
Which one of the following is not true about kinetin?
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It promotes bud growth.
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It defers senescence.
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It helps in retention of chlorophyll.
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It inhibits the cell division.
Kinetin is a type of cytokinin, a class of plant hormone that promotes cell division. Kinetin was originally isolated by Miller and Skoog et al as a compound from autoclaved herring sperm DNA that had cell division-promoting activity.