Question

How does chemical coordination occur in plants???

Answer 1

Answer:

Explanation: Plant hormones and growth regulators are chemicals that affect flowering; aging; root growth; distortion and killing of leaves, stems, and other parts; prevention or promotion of stem elongation; color enhancement of fruit; prevention of leafing and/or leaf fall; and many other conditions.

Gibberellic acid (GA) Stimulates cell division and elongation, breaks dormancy, speeds germination.  

Ethylene gas (CH2) Ripening agent; stimulates leaf and fruit abscission.  

Indoleacetic acid (IAA) Stimulates apical dominance, rooting, and leaf abscission.  

Auxin causes several responses in plants:  

Bending toward a light source (phototropism)  

Downward root growth in response to gravity (geotropism)  

Promotion of apical dominance  

Flower formation  

Fruit set and growth  

Formation of adventitious roots

Answer 2

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Chemical coordination occur in plants with the help of pytohormons or plant hormons secreted by plants.Auxin, cytokinin,gibberelline,abscisic acid are plant hormones.These hormones regulate yhe growth and development of the plants.They also regulates various metabolic activities in the plants.These hormones respond to the external stimuli like light,temperature etc.For example auxin is responsible for the growth of the plants and Cytokinin is responsible for the cell division.Similarly gibberellin is responsible for stem elongation,flowering, fruit ripening.Abscisic acid is responsible for the dormancy.