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.

Phytotoxicity of the fluoride ion and its uptake from solution culture by Avena sativa and Lycopersicon esculentum

D.P. Stevens, M.J. McLaughlin and A.M. Alston
Plant and Soil
Vol. 200, No. 2 (March (II) 1998), pp. 119-129
Published by: Springer
Stable URL: http://www.jstor.org/stable/42948280
Page Count: 11
  • More info
  • Cite this Item
Phytotoxicity of the fluoride ion and its uptake from solution culture by Avena sativa and Lycopersicon esculentum
Preview not available

Abstract

Avena sativa (oats) and Lycopersicon esculentum (tomatoes) were grown in dilute nutrient solutions containing varying concentrations of fluoride (F). Shoot and root growth of tomatoes were limited when calculated F ion activities (F⁻) were greater than 1473 µM in solution. However, F⁻ activities up to 5130 µm had no effect on the dry weights of oat shoots or roots, suggesting that tomatoes are more sensitive to F toxicity. At low F activities in solution (< 1684 µM) F concentrations in plant shoots increased almost linearly with activity, but then increased rapidly before reaching an upper asymptote. These findings are discussed in relation to plant uptake and toxicity of F. The complexation of Ca with F has been proposed as the mechanism of selectively altering membrane permeability to F, but further studies are required to confirm the role of Ca. Data recalculated from the literature and from this paper also suggest that growth solution ionic strength is positively related to uptake of F⁻ by plants.

Page Thumbnails

  • Thumbnail: Page 
119
    119
  • Thumbnail: Page 
120
    120
  • Thumbnail: Page 
121
    121
  • Thumbnail: Page 
122
    122
  • Thumbnail: Page 
123
    123
  • Thumbnail: Page 
124
    124
  • Thumbnail: Page 
125
    125
  • Thumbnail: Page 
126
    126
  • Thumbnail: Page 
127
    127
  • Thumbnail: Page 
128
    128
  • Thumbnail: Page 
129
    129