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.

Examples of short day plants

Obligate requirement:
*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.),
*Sugar cane.

See also



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

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Look at other dictionaries:

  • short-day plant — noun (botany) One that will flower only if the daily period of light is shorter than some critical length (cf ↑day neutral plant, ↑long day plant) • • • Main Entry: ↑short * * * short day plant «SHRT DAY», a plant that blooms only when its daily… …   Useful english dictionary

  • short-day plant — trumpadienis augalas statusas T sritis augalininkystė apibrėžtis Augalas, kurio normaliam augimui ir raidai reikia trumpos dienos. atitikmenys: angl. short day plant rus. растение короткого дня …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • short-day plant — /ˈʃɔt deɪ plænt/ (say shawt day plant) noun a plant which requires a comparatively long period of darkness in a 24 hour period to initiate flowering; typically flowering in late summer or autumn as the nights lengthen and the daylight hours… …   Australian English dictionary

  • short-day plant — A plant which will not flower until triggered to do so by exposure to one or a number of dark periods equal to or longer than its critical period. Other plant species are long day and some are daylength neutral. Genetic variation for daylength… …   Glossary of Biotechnology

  • short-day — ˈ ̷ ̷| ̷ ̷ adjective : responding to a short photoperiod used especially of a plant * * * /shawrt day /, adj. Bot. requiring a short photoperiod. [1915 20] * * * adj. [attrib.] (of a plant) needing a daily period of darkness of more than a… …   Useful english dictionary

  • short-day — adjective Date: 1920 responding to or relating to a short photoperiod used especially of a plant; compare day neutral, long day …   New Collegiate Dictionary

  • short-day — adjective (of a plant) needing a relatively long daily period of darkness to initiate flowering …   English new terms dictionary

  • long-day plant — /ˈlɒŋ deɪ plænt/ (say long day plant) noun a plant which requires a comparatively short period of darkness in a 24 hour period to initiate flowering, typically flowering in late spring or early summer as the length of the nights shortens and… …   Australian English dictionary

  • long-day plant — Plants requiring a period of short nights before the switch from vegetative to reproductive growth can be initiated. See: short day plant …   Glossary of Biotechnology

  • long-day plant — noun A plant that will only flower after being exposed to conditions of long days and short nights • • • Main Entry: ↑long * * * long day plant «LNG DAY, LONG », a plant that flowers only when exposed to light for a relatively long period of time …   Useful english dictionary

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