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以长势一致的3年生七叶一枝花(Paris polyphylla)为试材,在不同遮阴(全光照、30%、60%和75%遮阴)处理下,测定了七叶一枝花净光合速率(Pn)、蒸腾速率(Tr)、胞间二氧化碳浓度(Ci)、气孔导度(Gs)、蛋白质(Pro)含量、叶绿素(Chl)含量、丙二醛(MDA)含量和可溶性糖(Sug)含量,研究了梵净山珍稀植物七叶一枝花不同遮阴环境下的光合特性和生理特性。结果表明:遮阴处理30d时,60%遮阴处理下七叶一枝花的净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)、蛋白质(Pro)和叶绿素(Chl)含量最高,分别为5.82μmol·m-2·s-1、1.60mmol·m-2·s-1、0.14mol·m-2·s-1、19.25mg/g和3.72mg/g。综合分析表明,在对七叶一枝花人工种植和引种驯化时,可适当进行遮阴处理,且以60%遮阴为宜。
Using the same three-year-old Paris polyphylla as test material, the net photosynthetic rate of A. polyclinia was measured under different shade (full light, 30%, 60% and 75% shading) Pn, Tr, Ci, Gs, Pro, Chl, MDA, and Sug , The photosynthetic characteristics and physiological characteristics under the different shading conditions of rare plants of Fanjingshan were studied. The results showed that the net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), protein (Pro) and chlorophyll (Chl) The highest values were 5.82μmol · m-2 · s-1, 1.60mmol · m-2 · s-1, 0.14mol · m-2 · s-1, 19.25mg / g and 3.72mg / g, respectively. Comprehensive analysis showed that in the artificial planting and introduction and domestication of A. cuspidatum, the shading treatment can be carried out properly, and shading 60% is appropriate.