Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or 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.

Diurnal Cycle of Ascus Maturation of Taphrina deformans

C. E. Yarwood
American Journal of Botany
Vol. 28, No. 5 (May, 1941), pp. 355-357
Stable URL: http://www.jstor.org/stable/2436810
Page Count: 3
  • Read Online (Free)
  • Download ($12.00)
  • Subscribe ($19.50)
  • 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.
Diurnal Cycle of Ascus Maturation of Taphrina deformans
Preview not available

Abstract

Periodic observations of the asci and the use of spore trap slides have revealed a diurnal cycle of the peach leaf curl fungus (Taphrina deformans) on peach trees in a natural environment. Asci start growth from the ascogenous cells in the evening, nuclear divisions occur at night, and spores mature the following day. Ascospores are naturally discharged in greatest numbers in the evening with the maximum at about 8 P.M. which is several hours after they appear morphologically mature. Ascospore discharge is stimulated by the vapors of formalinacetic-alcohol acid fixative, but even under this stimulus they are not subject to discharge until after they are apparently morphologically mature.

Page Thumbnails

  • Thumbnail: Page 
355
    355
  • Thumbnail: Page 
356
    356
  • Thumbnail: Page 
357
    357