Photoperiodic Control of Flowering in Cocklebur (Xanthium strumarium)

  • Thomas C. Moore

Abstract

Photoperiodism1 may be defined simply as a response to the relative lengths of day and night, or more specifically, as a response to the duration and timing of light and dark periods. This phenomenon is an integral part of the over-all adaptation of many kinds of organisms — plant and animal — to their natural environments. Among the kinds of organisms which exhibit photoperiodism are at least some species among non-vascular and vascular cryptogams, gymnosperms, angiosperms, insects, fishes, reptiles, birds and mammals.

Keywords

Clay Corn Xanthium 

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Copyright information

© Springer-Verlag New York Inc. 1974

Authors and Affiliations

  • Thomas C. Moore
    • 1
  1. 1.Department of Botany and Plant PathologyOregon State UniversityCorvallisUSA

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