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Bromeliads, such as pineapple, can be induced to flower by treatment with ethylene. What are the...

Bromeliads, such as pineapple, can be induced to flower by treatment with ethylene. What are the external environmental signals higher plants use to induce flowering and why were these signals chosen?
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Answer #1

Many external signals induces flowering in plants.

Example, light, temperature, salt, stress,

Light is an external signal which induces flowering.

  • photoperiodism flowering and other developmental processes are regulated in response to the photoperiod, or day length.

  • Short-day plants flower when day length is below a certain threshold, while long-day plants flower when day length is above a certain threshold.

  • Temperature can also be a factor.Vernalization, i.e., prolonged exposure to cold, induces flowering in many plant species Ambient temperature influences flowering time by affecting the rate of growth and development throughout the plant life cycle

  • Excessive amounts or a deficiency of certain elements in the soil can alter flowering time

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