Photosynthetic action spectra (F = frac(φ ('; r) α, λ)) (Carpentier, R., Larue, B. and Leblanc, R. (1984) Arch. Biochem. Biophys. 228, 534-543.), from 400 to 750 nm were studied in bundle sheath cells of maize. Photosynthetic action spectra in the presence of 10 mM ascorbate or 4 mM ribose-5-phosphate were increased and shifted through all the spectra. After the addition of 10 M DCMU photosynthetic action spectra were remarkably diminished. On the basis of these results we suggest that the role of PSII in BS chloroplasts will be to prevent the overoxidation of PSI. I1 appears that in addition to PSII some endogen electron donor may regulate the PSI activity in bundle sheath cells.
|Original language||English (US)|
|Number of pages||5|
|Journal||Biochemical and biophysical research communications|
|State||Published - Apr 14 1987|
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology