Jackson, R B Nonsteady-State Photosynthesis following an Increase in Photon Flux Density (PFD) : Effects of Magnitude and Duration of Initial PFD. [electronic resource] - Plant physiology Feb 1991 - 498-503 p. digital Publication Type: Journal Article ISSN: 0032-0889 Standard No.: 10.1104/pp.95.2.498 doi