Factors affecting reproductive success in a rare grass, Calamagrostis porteri subsp. insperata

Kayri Havens*, Douglas L. Holland

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Calamagrostis porteri A. Gray subsp. insperata (Swallen) C. W. Greene is a rare grass that is currently treated as a 'species of concern' by the U.S. Fish and Wildlife Service. Production of viable seed had never been observed, and little was known about the factors affecting this reproductive failure. In this study we examined the effects of maternal genotype, pollen source, and light intensity on caryopsis (the single-seeded fruit produced in grasses) production. Maternal genotype and pollen source (self vs. outcross) significantly affected the number of caryopses initiated, while light intensity had no significant effect. However, nearly all of the caryopses initialed aborted late in development. In the 2000+ florets we examined, only one fully filled, viable caryopsis was found. The conditions under which this caryopsis was produced suggest future courses of management.

Original languageEnglish (US)
Pages (from-to)64-68
Number of pages5
JournalAnnals of the Missouri Botanical Garden
Volume85
Issue number1
DOIs
StatePublished - Jan 1 1998

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science

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