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Biophysical Journal 21: 177-180 (1978)
© 1978 the Biophysical Society

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Low-intensity two-step absorption of chlorophyll A in vivo.

D Leupold, B Voigt, S Mory, P Hoffmann and B Hieke

ABSTRACT

The intensity-dependent transmission of primary leaves of Triticum aestivum seedlings at lambda = 694 nm was measured with single pulses of a Q-switch ruby laser. At photon flux densities above 2 x 10(17) cm-2s-1 a decrease of transmission was observed. The result is interpreted as a two-step absorption of cooperative units of 10(5)-10(6) chlorophyll molecules.






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Copyright © 1978 by the Biophysical Society.