The chlorophyll fluorescence parameters of five introduced dwarf bamboos were measured by IMAGING - PAM chlorophyll fluorometer. The results showed that the differences in photochemical quenching coefficient (qP) and quantum yield of photosystem Ⅱ electron transport (Φ PS Ⅱ ) of Pleioblastus argenteoslri atus, P. Glabraf. Albo - striata, P. Fortunei, P. Kongosanensis f. Aureo - striaus, and P. Auricoma were not extremely significant. Apparent photosynthetic electron transport rate ( ETR) and non - photochemical quenching coefficient (qN) of Pleioblastus auricoma were significantly higher than those of P. Argenteostriatus and P. Kongosanensisf. Aureo - striaus (P < 0. 05 ). The maximal photochemical efficiency of photosystem Ⅱ ( Fx/Fm ) of P. Argenteostriatus was significantly lower than that of the other four dwarf bamboos ( P <0.05 ). The adaptabilities to the full illumination environment and the capabilities of defensing photoinhibition of P. Ar genteostriatus were the lowest of the five dwarf bamboos. It' s light saturation point was 800 μmol/(m ? S) with its highest ETR (60 μmol/( m2 ? S) ). The light utilization efficiency and capability of defensing photoin hibition of P. Auricoma were the highest of the five dwarf bamboos. It' s light saturation point was 1 300 μmol/(m2 ? S) with its highest ETR (110 μmol/(m2 ? S)).%以5种引种地被竹为材料,利用IMAGING - PAM便携式荧光仪对其叶绿素荧光参数进行测定.结果表明:铺地竹、靓竹、菲白竹、黄条金刚竹和菲黄竹的光化学淬灭系数(qP)和PSⅡ电子传递量子效率(φPSⅡ)差异不显著.菲黄竹的表观光合电子传递速率(ETR)和非光化学猝灭系数(qN)显著高于铺地竹和黄条金刚竹(P＜0.05).铺地竹的PSⅡ最大光化学量子产量(F(o)/Fm)显著低于其余4个竹种,其差异性达显著水平(P＜0.05).铺地竹在试验地全光照环境下的适应性没有其它竹种强,防御光抑制的能力最弱,光饱和点为800 μmol/( m2·s),此时ETR达到最高值60 μmol/( m2·s),菲黄竹具有最高的光能利用率和防御光抑制能力,其光饱和点为1 300μmol/(m2 ·s),此时ETR达到最高值110 μmol/(m2·s).
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