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

Germination and Appressorium Development of Phyllosticta ampelicida Pycnidiospores

B. D. Shaw, KerChung Kuo and H. C. Hoch
Mycologia
Vol. 90, No. 2 (Mar. - Apr., 1998), pp. 258-268
DOI: 10.2307/3761301
Stable URL: http://www.jstor.org/stable/3761301
Page Count: 11

You can always find the topics here!

Topics: Appressoria, Germination, Melanin, Fungi, Conidia, Septum, Appendages, Polycarbonates, Colletotrichum, Microscopy
Were these topics helpful?
See something inaccurate? Let us know!

Select the topics that are inaccurate.

Cancel
  • Read Online (Free)
  • 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.
Germination and Appressorium Development of Phyllosticta ampelicida Pycnidiospores
Preview not available

Abstract

Germination of Phyllosticta ampelicida pycnidiospores was followed from attachment through development of mature, highly melanized appressoria. Using time- lapsed video microscopy, it was determined that mature appressoria formed within 6 hours of attachment of the spores on hydrophobic substrata. Pycnidiospores germinated in the presence of tricyclazole did not produce pigmented appressoria indicating that the darkening agent is melanin, which in normal appressoria reached maximum levels within 6 hours following germination. Pycnidiospores were binucleate. Prior to development of the septum separating the pycnidiospore and germ tube from the appressorium, the two nuclei divided mitotically and three of the four resulting nuclei migrated into the appressorium. The fourth nucleus remained in the pycnidiospore where it degraded ultimately. Mature appressoria formed penetration pegs capable of penetrating polycarbonate.

Page Thumbnails

  • Thumbnail: Page 
258
    258
  • Thumbnail: Page 
259
    259
  • Thumbnail: Page 
260
    260
  • Thumbnail: Page 
261
    261
  • Thumbnail: Page 
262
    262
  • Thumbnail: Page 
263
    263
  • Thumbnail: Page 
264
    264
  • Thumbnail: Page 
265
    265
  • Thumbnail: Page 
266
    266
  • Thumbnail: Page 
267
    267
  • Thumbnail: Page 
268
    268