Tag: chemical coordination in plants
Questions Related to chemical coordination in plants
Cut pr excised leaves remain green for long if induced to root or dipped in
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Gibberellins
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Cytokinins
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Auxins
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Ethylene
Cytokinin is a plant hormone. It promotes cell division. It also delays the destruction of chlorophyll and protein. It shows delay of senescence in leaves and keeps leaves green for long time. So when cut or excised leaves are induced to root, it will remain green because root synthesizes cytokinin hormone.
The regulator which retards ageing senescence of plant parts is
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Cytokinin
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Auxin
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Gibberellin
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Abscisic acid
Cytokinins is a plant hormone. It retards ageing senescence of plant parts and thus keep them productive for longer duration. This is called as Richmond Lang effect. It delays destruction of chlorophyll. It has an effect on protein synthesis and mobilizing nutrients.
Cytokinins are mostly
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Glucosides
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Aminopurines
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Acidic
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Phenolic
The first cytokinin discovered was an aminopurine derivative named kinetin. Except zeatin which is adenine derivative, all other present cytokinins are aminopurines. All the naturally occurring cytokinins are substituted purines, in which sixth carbon is substituted by amino group.
Hormone discovered through tissue culture technique is
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Auxin
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Cytokinin
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Gibberellin
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Abscisic acid
Hormone discovered through tissue culture technique is cytokinin. Cytokinin was discovered by Skoog and Miller. The first cytokinin discovered was kinetin. This was isolated as a DNA degradation product.
Hormone that promotes growth of lateral buds/has negative effect on apical dominance is
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Cytokinin
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Gibberellin
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Auxin
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Both B and C
Apical dominance is a phenomenon in which central stem is dominant and lateral stems are suppressed. It is due to plant hormones auxin produced in the tip of the shoot. It promotes apical dominance and does not allow lateral / axillar buds to grow. Another plant hormone, cytokinin is responsible for having negative effect on the apical dominance. It promotes the growth of lateral buds.
Interfascicular cambium formation is induced by
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Auxin
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Cytokinin
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Gibberellin
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Ethylene
Cytokinin is a plant hormone which is involved in growth and development of plants. It is required for the cambial growth. Kinetin, a type of cytokinin promotes cell division. It induces formation of interfascicular cambium in plants.
Cytokinin synthesis is maximum in
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Roots
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Leaves
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Shoot tip
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Fruit
Cytokinin is a plant hormone. It promotes cell division. It also delays the destruction of chlorophyll and protein. It shows delay of senescence in leaves. It is mostly produced in the root apex. Roots synthesize maximum amount of cytokinin hormone.
Which of the following is a cytokinin?
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Phytochrome
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Leucine
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Ethylene
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Zeatin
Cytokinin is a plant hormone which is involved in various physiological processes of plants. Zeatin is the most common type of naturally occurring cytokinin. It is found in maize. It is also found in the coconut milk. It promotes cell division.
Induction of cell division and delay in senescence are due to
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Gibberellin
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Auxin
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Cytokinin
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Ethylene
Cytokinin is a plant hormone. It plays major role in cell proliferation and cell division. It also delays the destruction of chlorophyll and protein. During senescence, cytokinin levels are low. It delays in senescence of leaves when sprayed externally by delaying the destruction of chlorophyll and proteins in leaves
Which is not a function of cytokinin?
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Delay is senescence
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Breaking seed dormancy
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Promoting bud dormancy
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Promoting stomatal opening
Cytokinin (CK) is a plant hormone. It promotes cell division and delays senescence in plants. It improves nutrient mobilization and thus delays leaf senescence. When applied externally, it mobilizes nutrients towards sites of application. It also promotes stomatal opening along with auxin hormone. It also breaks the dormancy of seeds and induce seed germination.