______cause delay in the ageing of leaves.

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Solution

Cytokinins:
It is a plant hormone that is synthesised in the root apex, and endoderm of seeds and stimulates cell division.
It also prevents the ageing of plant parts.
It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation.
Final answer: Cytokinins cause a delay in the ageing of leaves.

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Similar questions

Plant Hormone	Functions
1. Auxin	Helps in the growth of plant tissue.
2. Cytokinin	Promotes cell division, delays aging of cells.
3. Ethylene	Inhibits growth and causes wilting of leaves, promoting dormancy of buds.
4. Gibberellin	This is a gaseous hormone that causes the ripening of fruits.

Whichone of the plant growth regulators would you use if you are asked to:

(a)Induce rooting in a twig

(b)Quickly ripen a fruit

(c)Delay leaf senescence

(d)Induce growth in axillary buds

(e)‘Bolt’ a rosette plant

(f)Induce immediate stomatal closure in leaves.

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