关键词: 马蹄莲, 马蹄莲, 鲜切花, 植物色素, 染色效应

Abstract: In order to explore the response to light of different varieties of A. cremastogyne Burk to provide theoretical basis for introduction and extending theirs cultivation area, the photosynthetic characteristics of four varieties, namely, H1, H12, J5 and J10, were studied in this paper. The results showed as follows: (1) four varieties had rather lower light compensation point (LCP)( 3.16~50.61μmol/<m^-2·s^-1>) and rather higher light saturation point(LSP)(＞800μmol/<m^-2·s^-1>), and both of the two indexes’order were J10＞H12＞J5＞H1, which indicated that four varieties could adapt many types of light condition, and H12 and J10 had rather stronger ability to make use of strong light, and theirs growth rate was higher than that of H1 and J5, while the latter had rather stronger ability to utilize weak light; (2) Theirs apparent quantum efficiency (AQE) ranged from 0.0303 mol/mol to 0.0495mol/mol, which basically accorded to conventional AQE under natural condition. (3) The main eco-physiological factors affecting photosynthetic rate (Pn) were stomatal conductance (Gs), intercellular CO2 concentration (Ci) and light intensity, and Pn of J5 and J10 were also affected greatly by CO₂R; However, Pn of H1 and H12 were obvious affected by Tleaf and Vpdl.