Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Journal Article

Movements of Helianthus annuus Leaves and Heads

A. R. G. Lang and J. E. Begg
Journal of Applied Ecology
Vol. 16, No. 1 (Apr., 1979), pp. 299-305
DOI: 10.2307/2402749
Stable URL: http://www.jstor.org/stable/2402749
Page Count: 7

You can always find the topics here!

Topics: Leaves, Head, Plants, Petioles, Sunflowers, Flowering, Sun, Irradiance, Surface temperature, Tanneries
Were these topics helpful?
See somethings inaccurate? Let us know!

Select the topics that are inaccurate.

Cancel
  • Read Online (Free)
  • Download ($18.00)
  • Subscribe ($19.50)
  • Add to My Lists
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Movements of Helianthus annuus Leaves and Heads
Preview not available

Abstract

(1) Diurnal movements of heads and leaves of sunflower (Helianthus annuus cv Hysun 30) were determined from three-dimensional maps of the organs. (2) Diurnal E-W oscillations of the heads occurred initially but ceased as the flowers opened and anthesis commenced, leaving the heads facing east. The amplitude of the leaf movements also diminished with time. (3) The easterly aspect of the heads reduced the maximum temperature of the florets; this may increase seed set.

Page Thumbnails

  • Thumbnail: Page 
[299]
    [299]
  • Thumbnail: Page 
300
    300
  • Thumbnail: Page 
301
    301
  • Thumbnail: Page 
302
    302
  • Thumbnail: Page 
303
    303
  • Thumbnail: Page 
304
    304
  • Thumbnail: Page 
305
    305
Part of Sustainability