Plant Physiology, August 1st, 2004
The role of a C^sub 4^ pathway in photosynthetic carbon fixation by marine diatoms is presently debated. Previous labeling studies have shown the transfer of photosynthetically fixed carbon through a C^sub 4^ pathway and recent genomic data provide evidence for the existence of key enzymes involved in C^sub 4^ metabolism. Nonetheless, the importance of the C^sub 4^ pathway in photosynthesis has been questioned and this pathway is seen as redundant to the known CO2 concentrating mechanism of diatoms. Here we show that the inhibition of phosphoenolpyruvate carboxylase (PEPCase) by 3,3-dichloro-2...
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