Short day plant

A short day plant is a plant that cannot flower under the long days of summer. Short day plants typically flower in the fall of the year. These plants require a certain number of hours of darkness in each 24 hour period (a short daylength) before floral development can begin. Plants use the phytochrome system to sense daylength or photoperiod.

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Examples of short day plants

Obligate requirement:

• Chrysanthemum
• Coffee,
• Poinsettia
• Strawberry
• Tobacco, var. Maryland Mammouth
• Common duckweed, Lemna minor
• Cocklebur (Xanthium sp.)
• Maize - tropical cultivars only - others are day neutral plants

Ogulative (quantitative requirement):

• Hemp (Cannabis sp.),
• Cotton (Gossypium sp.),
• Rice,
• Sugar cane.

See also

• Florigen
• Photoperiodism
• Phytochrome

References

Fosket, D.E. Plant Growth & Development, A Molecular Approach. Academic Press, san Diego, 1994, p. 495.