Long day plant

Long day plant

A long day plant is a plant that requires fewer than a certain number of hours of darkness in each 24 hour period to induce flowering. Long day plants typically flower in the late spring or early summer Plants use the phytochrome system to sense daylength or photoperiod.

Examples of long day plants:

Obligate requirement:

Carnation (Dianthus sp.), Henbane (Hyoscyamus sp.), Oat (Avena sp.), Ryegrass (Lolium sp.), Clover (Trifolium sp.).Bellflower (Campanula carpatica)

Facultative (quantitative requirement):

Pea (Pisum sativum), Barley (Hordeum vulgare), Lettuce (Lactuca sativa), Wheat (Triticum aestivum, spring wheat cultivars), Turnip (Brassica rapa).

See also

*Florigen
*Photoperiodism
*Phytochrome

References

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


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Look at other dictionaries:

  • 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

  • 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… …  

  • long-day plant — ilgadienis augalas statusas T sritis augalininkystė apibrėžtis Augalas, kuriam normaliai augti, taip pat kurio raidai reikia ilgos dienos. Tokie yra javai, lubinai, linai ir kiti augalai. atitikmenys: angl. long day plant rus. растение длинного… …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • 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

  • 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 — /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… …  

  • 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 …   Wikipedia

  • 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

  • long-day — ˈ ̷ ̷| ̷ ̷ adjective : responding to a long photoperiod used of plants * * * /lawng day , long /, adj. Bot. requiring a long photoperiod in order to flower. [1915 20] * * * adj. (of a plant) needing a long period of light each day to initiate… …   Useful english dictionary

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

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