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.

Effect of Ozone on the Development of Vesicular-Arbuscular Mycorrhizae in Sugar Maple Saplings

Lynn Duckmanton and Paul Widden
Mycologia
Vol. 86, No. 2 (Mar. - Apr., 1994), pp. 181-186
DOI: 10.2307/3760634
Stable URL: http://www.jstor.org/stable/3760634
Page Count: 6
  • Read Online (Free)
  • 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.
Effect of Ozone on the Development of Vesicular-Arbuscular Mycorrhizae in Sugar Maple Saplings
Preview not available

Abstract

We examined the effects of ozone on the incidence of vesicular-arbuscular mycorrhizae in the roots of sugar maple (Acer saccharum) seedlings using a modified grid-line intersect method. The presence of vesicles, arbuscules, hyphal coils and internal mycelium was recorded. As the concentration of ozone increased, the frequency of vesicles, hyphal coils and internal mycelium increased while that of arbuscules decreased. Total infection rates, however, remained unchanged with increasing ozone levels. It is suggested that the fungi are responding to stress in the plant by increasing the production of less energy demanding and less efficient organs for exchange of nutrients (coils), and by increasing the resources allocated to storage and future growth (vesicles). The increase in internal mycelium (most of which was probably not mycorrhizal) may represent an increase in susceptibility to infection by fungi other than vesicular-arbuscular mycorrhizal fungi.

Page Thumbnails

  • Thumbnail: Page 
181
    181
  • Thumbnail: Page 
182
    182
  • Thumbnail: Page 
183
    183
  • Thumbnail: Page 
184
    184
  • Thumbnail: Page 
185
    185
  • Thumbnail: Page 
186
    186