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Manipulation of Phalaenopsis Orchid Spike and Flower Growth by Wavelength of Light and Diurnal Time Cycles.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Manipulation of Phalaenopsis Orchid Spike and Flower Growth by Wavelength of Light and Diurnal Time Cycles./
作者:	Holley, Jacob Mark.
面頁冊數:	1 online resource (67 pages)
附註:	Source: Masters Abstracts International, Volume: 78-05.
Contained By:	Masters Abstracts International78-05.
標題:	Horticulture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10182733click for full text (PQDT)
ISBN:	9781369310481

Manipulation of Phalaenopsis Orchid Spike and Flower Growth by Wavelength of Light and Diurnal Time Cycles.
Holley, Jacob Mark.

Manipulation of Phalaenopsis Orchid Spike and Flower Growth by Wavelength of Light and Diurnal Time Cycles. - 1 online resource (67 pages)

Source: Masters Abstracts International, Volume: 78-05.

Thesis (M.S.)--University of California, Davis, 2016.

Includes bibliographical references

Phalaenopsis orchids have one of the longest greenhouse crop production times, averaging 18 to 24 months from propagation to sale. The long production time is expensive for commercial producers because every stage of production requires a controlled environment in the form of a greenhouse or growth chamber. Different quantities of red and blue light were applied to Phalaenopsis flower spikes in order to observe differences in elongation and spike morphology. The total number of flowers on each plant was not affected by light quality. Although differences in spike length were not dramatic, production time differed between treatments. Flower spikes in the pure red treatment emerged earliest. Treatments consisting of 20 μmol m-2 s-1 blue light and 180 μmol m-2 s-1 red light were quickest to bloom. In an additional experiment, flower spikes were exposed to white light or combinations of monochromatic red and blue light while leaves were exposed to white light. None of the treatments affected spike length during the first four weeks, but after 12 weeks the spikes exposed to red, blue, or red and blue light were shorter than those exposed to white light. LED lighting has the potential to influence spike growth and production time of Phalaenopsis. The effect of lighting cycles on Phalaenopsis flower spike growth and development was tested by exposing plants to light cycles of 20, 24, or 28 hours, each divided into equal periods of light and dark. Significant differences were observed in overall growth of flowers. The results show that flower count was greatest in plants exposed to the 20-hour cycle. The 28 hour treatment resulted in the lowest flower count. None of the treatments affected time to flower opening. Further studies entailing manipulation of light cycles are warranted.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9781369310481Subjects--Topical Terms:

555447
Horticulture.
Subjects--Index Terms:

DiurnalIndex Terms--Genre/Form:

542853
Electronic books.

Manipulation of Phalaenopsis Orchid Spike and Flower Growth by Wavelength of Light and Diurnal Time Cycles.
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245 1 0 $a Manipulation of Phalaenopsis Orchid Spike and Flower Growth by Wavelength of Light and Diurnal Time Cycles.
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500 $a Source: Masters Abstracts International, Volume: 78-05.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Lieth, J. Heinrich.
502 $a Thesis (M.S.)--University of California, Davis, 2016.
504 $a Includes bibliographical references
520 $a Phalaenopsis orchids have one of the longest greenhouse crop production times, averaging 18 to 24 months from propagation to sale. The long production time is expensive for commercial producers because every stage of production requires a controlled environment in the form of a greenhouse or growth chamber. Different quantities of red and blue light were applied to Phalaenopsis flower spikes in order to observe differences in elongation and spike morphology. The total number of flowers on each plant was not affected by light quality. Although differences in spike length were not dramatic, production time differed between treatments. Flower spikes in the pure red treatment emerged earliest. Treatments consisting of 20 μmol m-2 s-1 blue light and 180 μmol m-2 s-1 red light were quickest to bloom. In an additional experiment, flower spikes were exposed to white light or combinations of monochromatic red and blue light while leaves were exposed to white light. None of the treatments affected spike length during the first four weeks, but after 12 weeks the spikes exposed to red, blue, or red and blue light were shorter than those exposed to white light. LED lighting has the potential to influence spike growth and production time of Phalaenopsis. The effect of lighting cycles on Phalaenopsis flower spike growth and development was tested by exposing plants to light cycles of 20, 24, or 28 hours, each divided into equal periods of light and dark. Significant differences were observed in overall growth of flowers. The results show that flower count was greatest in plants exposed to the 20-hour cycle. The 28 hour treatment resulted in the lowest flower count. None of the treatments affected time to flower opening. Further studies entailing manipulation of light cycles are warranted.
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538 $a Mode of access: World Wide Web
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653 $a Diurnal
653 $a Flowers
653 $a LED technology
653 $a Phalaenopsis
653 $a Photoperiods
653 $a Spikes
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710 2 $a University of California, Davis. $b Horticulture and Agronomy. $3 1676792
773 0 $t Masters Abstracts International $g 78-05.
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