Chloroplast fluorescence of C4 plants : II. A photographic technique for obtaining relative fluorescence yields and spectra photographically.

A technique is described in which infrared black and white film is used to measure relative fluorescence yields and fluorescence emission spectra of the mesophyll and bundle-sheath chloroplasts of C4 plants in situ at room temperature. The spectra obtained with this technique are quite similar to those obtained by conventional techniques.