采用盆栽试验法,对花叶唐竹(SInObAMbuSA TOOTSIk f.luTEOlO-AlbO-STrIATA)、小琴丝竹(bAMbuSA MulTIPlEX‘AlPHOnSE-kArr’)和刺黑竹(CHIMOnObAMbuSA nEOPurPurEA)进行不同浓度盐(nACl)胁迫(Ck、0.1%、0.3%、0.5%、0.7%、1.0%)处理,用美国lI-COr公司生产的lI-6400便携式光合作用分析系统测定其各项光合作用相关指标,分析研究其中重要的4项指标:净光合速率(Pn)、气孔导度(gS)、胞间二氧化碳浓度(CI)和蒸腾速率(E),以探究nACl胁迫对3种竹子叶片光合作用的影响。结果表明:低盐胁迫(0.1%nACl处理)提高了小琴丝竹和刺黑竹叶片净光合速率、气孔导度和蒸腾速率,而对花叶唐竹影响不大,但随着盐胁迫浓度的增加,3种竹类植物叶片的净光合速率、气孔导度和蒸腾速率呈逐渐下降的趋势;3种竹类植物胞间二氧化碳浓度随盐胁迫浓度的提高变化规律不明显。Four important indices of photosynthesis,including net photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(E) and intercellular CO2(Ci) of the three bamboos of Sinobambusa tootsik f.luteolo-albostriata,Bambusa multiplex ‘Alphonse-karr’ and Chimonobambusa neopurpurea were studied by LI-6400 Portable Photosynthesis System and treatments by different concentrations of NaCl(CK-0.0%,S1-0.1%,S2-0.3%,S3-0.5%,S4-0.7% and S5-1.0%) in order to discuss the effects of NaCl stress on the photosynthesis of bamboos.The results showed that: low concentrations of NaCl stress(0.1%) promoted the Pn,Gs and E of Bambusa multiplex ‘Alphonse-karr’ and Chimonobambusa neopurpurea,but little effect on Sinobambusa tootsik f.luteolo-albo-striata;from 0.3% NaCl stress to 1.0% NaCl stress,with the increasing of salinity,Pn,Gs and E of all three bamboos were decreased;Ci of all three bamboos was not in good relationship with the increasing of salinity.厦门市科学技术局科研项目(No.3502Z20102003); 厦门市市政园林局科研项目(No.YK-2000-02
