A simple system for promoting flowering of upland switchgrass in the greenhouse

Joseph C. Castro, Arvid Boe, DoKyoung Lee

Research output: Contribution to journalArticle

Abstract

The transition from vegetative to reproductive development in switchgrass (Panicum virgatum L.) has been described as a photoperiod-mediated process. With its extensive native range, photoperiod response varies widely within the species. To synchronize flowering among cultivars of distinct origin, disparities in light-driven developmental responses often require breeders to develop elaborate photoperiod regimens. The objective of this research was to identify a simple photoperiod treatment that could be used to evoke sexual reproductive development for three upland cultivars of switchgrass: Cave-In- Rock (origin 37°N), Sunburst (origin 42°N), and Dacotah (origin 46°N). To evaluate photoperiod sensitivity, switchgrass clones were grown in the greenhouse under various local natural ambient photoperiods, as well as under a 24-h low-irradiance daylight extension. Despite previously being described as a short-day plant, these upland cultivars of switchgrass were induced to flower under 24-h low-irradiance daylight-extended photoperiod. This daylight extension method was valid for use in addition to any ambient photoperiod. These results identified a simple system that used inexpensive equipment (common fluorescent bulbs) and required no alternating light and dark periods to promote panicle production in switchgrass. This system will be useful for improving seed yield components, via controlled pollination in the greenhouse, most especially when the ambient photoperiods are not favorable for floral induction.

Original languageEnglish (US)
Pages (from-to)2607-2614
Number of pages8
JournalCrop Science
Volume51
Issue number6
DOIs
StatePublished - Nov 1 2011

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Panicum virgatum
highlands
photoperiod
flowering
greenhouses
cultivars
fluorescent lighting
scotophase
photophase
caves
yield components
seed yield
pollination
rocks
clones
flowers

ASJC Scopus subject areas

  • Agronomy and Crop Science

Cite this

A simple system for promoting flowering of upland switchgrass in the greenhouse. / Castro, Joseph C.; Boe, Arvid; Lee, DoKyoung.

In: Crop Science, Vol. 51, No. 6, 01.11.2011, p. 2607-2614.

Research output: Contribution to journalArticle

Castro, Joseph C. ; Boe, Arvid ; Lee, DoKyoung. / A simple system for promoting flowering of upland switchgrass in the greenhouse. In: Crop Science. 2011 ; Vol. 51, No. 6. pp. 2607-2614.
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