盐环境对杂交树种密胡杨生长和光合特性的影响  

Effects of Salt Environment on Growth and Photosynthetic Characteristics of Populus talassica×P.euphratica

作　　者：孙阳 韩占江 师建银[2] 唐宏宥 李康 SUN Yang;HAN Zhanjiang;SHI Jianyin;TANG Hongyou;LI Kang(Key Laboratory Biological Resources Conservation and Utilization in Tarim Basin, Xinjiang Production and Construction Corps/ College of Life Sciences, Tarim University,Aral Xinjiang 843300, China;General Forestry Management Station of Xinjiang Production and Construction Corps, Urumqi 830000,China)

机构地区：[1]塔里木大学生命科学学院/新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室,新疆阿拉尔843300 [2]新疆生产建设兵团林业工作管理总站,乌鲁木齐830000

出　　处：《新疆农业科学》2021年第4期634-642,共9页Xinjiang Agricultural Sciences

基　　金：新疆生产建设兵团林业管理总站项目“密胡杨在南疆营造林的适应性研究与推广示范”;新疆生产建设兵团重点领域创新团队建设计划(2018CB003);新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室开放课题“新树种密胡杨对塔里木盆地盐渍环境的适应性研究”(BRZD1902)。

摘　　要：【目的】分析不同浓度NaCl处理对密胡杨叶片形态和光合特性的影响,为研究密胡杨盐环境响应机制提供依据。【方法】以盆栽密胡杨为材料,测定分析密胡杨叶片在不同浓度NaCl(0、200、250、300、350、400、450 mmol/L)处理后叶片形态和光合特性的变化。【结果】200~450 mmol/L NaCl环境对密胡杨叶长抑制作用较明显,450 mmol/L NaCl环境对叶宽有显著抑制。200~350 mmol/L NaCl环境对密胡杨净光合速率(Pn)和气孔导度(Gs)变化影响不显著,在400~450 mmol/L NaCl环境时Pn显著降低,蒸腾速率(Tr)和胞间CO2浓度(Ci)整体呈现先升高后下降的趋势。【结论】密胡杨在中低浓度盐环境(0~350 mmol/L NaCl)下生长良好,在高浓度盐环境(400~450 mmol/L NaCl)下叶形窄小,仍保持较高净光合速率,表现出较强的耐盐特性。【Objective】To study the effects of different concentrations of NaCl treatment on morphology and photosynthetic characteristics of leaves of Populus talassica×P.euphraticain the hope of providing theoretical basis for exploring the environmental response mechanism of P.talassica×P.euphratica salt.【Methods】Changes of growth indexes and photosynthetic characteristics of leaves of P.talassica×P.euphratica of different concentrations NaCl(0,200,250,300,350,400 and 450 mmol/L)were determined and analyzed using potted P.talassica×P.euphratica as test material.【Results】The inhibition of leaf length of P.talassica×P.euphratica by environment of 200-450 mmol/L NaCl was obvious,450 mmol/L NaCl environment significantly inhibited leaf width.The effect of 200-300 mmol/L NaCl environment on the net photosynthetic rate(Pn)of P.talassica×P.euphratica was not significant,and Pn decreased significantly in 400-450 mmol/L NaCl environment and in salt environment transpiration rate(Tr)and intercellular CO2 concentration(Ci)showed a first increase and then a decrease.【Conclusion】P.talassica×P.euphratica euphratica can grow well in medium and low concentration salt environment(0-350 mmol/L NaCl),but the leaf shape is narrow and small under high concentration salt environment(400-450 mmol/L NaCl)with high net photosynthetic rate and strong salt tolerance characteristics,which provides a reference for studying the response mechanism of stress in P.talassica×P.euphratica.

关 键 词：密胡杨 盐环境 叶片形态 光合特性 

分 类 号：S719[农业科学—林学]