NEW C₄ AND CAM PLANTS

The identification of the photosynthetic pathway of 46 species from the Poaceae, Cypcraceae, Amaranthaceae and Asclepiadaceae were made using stable carbon isotope ratio measurements. 36 species showed the δ¹³C value of -10.43 to -13.66‰ and 1 species with succulent leaves had aδ¹³C value of -15.24‰. It is suggested that these species are new C₄ and CAM type plants, respectively.According to the mean δ¹³C value of three C₄ suhtypes proposed hy Hatteraley, it is possible that 8 species with δ¹³C value of -10.4 to -10.9‰ are NADP-ME type, and 6 species with δ¹³C value of-13‰ may be the NAD-ME type. The others will be NADP-ME or PCK type.