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The Development Of Crassulacean Acid Metabolism (Cam) Photosynthesis In Cotyledons Of The C4 Species, Portulaca Grandiflora (Portulacaceae), Lonnie J. Guralnick, Kate E. Gilbert, Diana Denio, Nicholas Antico
The Development Of Crassulacean Acid Metabolism (Cam) Photosynthesis In Cotyledons Of The C4 Species, Portulaca Grandiflora (Portulacaceae), Lonnie J. Guralnick, Kate E. Gilbert, Diana Denio, Nicholas Antico
Arts & Sciences Faculty Publications
Portulaca grandiflora simultaneously utilizes both the C4 and Crassulacean acid metabolism (CAM) photosynthetic pathways. Our goal was to determine whether CAM developed and was functional simultaneously with the C4 pathway in cotyledons of P. grandiflora. We studied during development whether CAM would be induced with water stress by monitoring the enzyme activity, leaf structure, JO2 (rate of O2 evolution calculated by fluorescence analysis), and the changes in titratable acidity of 10 and 25 days old cotyledons. In the 10 days old cotyledons, C4 and CAM anatomy were evident within the leaf tissue. The cotyledons showed …