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.

Chlorophyll A Fluorescence as a Quantitative Probe of Photosynthesis: Effects of Co2 Concentration During Gas Transients on Chlorophyll Fluorescence in Spinach Leaves

Robert T. Furbank and David A. Walker
The New Phytologist
Vol. 104, No. 2 (Oct., 1986), pp. 207-213
Published by: Wiley on behalf of the New Phytologist Trust
Stable URL: http://www.jstor.org/stable/2434649
Page Count: 7
  • 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.
Chlorophyll A Fluorescence as a Quantitative Probe of Photosynthesis: Effects of Co2 Concentration During Gas Transients on Chlorophyll Fluorescence in Spinach Leaves
Preview not available

Abstract

The relationship between changes in chlorophyll a fluorescence and changes in CO2 concentration in spinach leaves is analyzed. The height of the fluorescence excursion, when plotted against the CO2 concentration during the transient, results in a hyperbola. When these data are replotted on an inverse-reciprocal plot, an apparent Km (CO2) for the fluorescence transient can be obtained which closely approximates the Km (CO2) for carbon assimilation under similar conditions. Transitions in CO2 concentration at 2% O2 result in deviation from this hyperbolic relationship, reducing the apparent Km (CO2) for this process. The relationship between carbon assimilation and chlorophyll fluorescence is discussed with reference to the two components of fluorescence quenching. This technique raises the possibility that chlorophyll fluorescence could be used as a quantitative as well as a qualitative tool in plant screening.

Page Thumbnails

  • Thumbnail: Page 
207
    207
  • Thumbnail: Page 
208
    208
  • Thumbnail: Page 
209
    209
  • Thumbnail: Page 
210
    210
  • Thumbnail: Page 
211
    211
  • Thumbnail: Page 
212
    212
  • Thumbnail: Page 
213
    213