Study on change of leaf morphology and photosynthetic characters of three Paphiopedilum species introduced in south China

Morphologic change, content of chlorophyll and carotenoid, and net photosynthesis rate of leaves of three Paphiopedilum introduced by south china were studied. The result showed that among Paphiopedilums introduced, the area of mature leaf of P. armeniacum and P. micranthum significantly diminished and the area of mature leaf of P. malipoense significantly enlarged. The number of pores of unit area of P. armeniacum decreased. The content of chlorophyll and carotenoid increased and net photosynthesis rate descended in this three species.