外源Ca^(2+)对盐胁迫下唐古特白刺气孔形态的影响  

Effect of Exogenous Ca^(2+) on Stomatal Morphology of Nitratia tangutorum Under Salt Stress

作　　者：宣亚楠 刘威[1] 高彦博 杜玉玲[1] 闫永庆[1] 

机构地区：[1]东北农业大学园艺学院,黑龙江哈尔滨150030

出　　处：《北方园艺》2015年第6期62-67,共6页Northern Horticulture

基　　金：东北农业大学博士启动基金资助项目(2012RCB63);黑龙江省教育厅科学技术研究资助项目(11551052);黑龙江省自然科学基金面上资助项目(C2011427)

摘　　要：以盐生植物唐古特白刺为试材,研究了不同浓度外源Ca2+(0、5、10、15、20mmol/L)对不同浓度NaCl(100、200、300、400mmol/L)胁迫下唐古特白刺的气孔形态变化的影响。结果表明:唐古特白刺气孔长度和宽度随盐浓度的升高均降低,NaCl浓度为200mmol/L处理下,气孔长度和宽度在Ca2+浓度为10mmol/L时出现最大值,NaCl浓度≥300mmol/L处理下,气孔长度和宽度在Ca2+浓度为15mmol/L时出现最大值。唐古特白刺表皮气孔密度随NaCl浓度升高,逐渐降低;随外源Ca2+浓度升高,气孔密度先增加后降低,NaCl浓度≤300mmol/L时,各盐处理在Ca2+浓度为5mmol/L时气孔密度达到最大值,NaCl浓度为400mmol/L时,虽然气孔密度增大,但是部分气孔发育不成熟,有些变形严重,不能行使其功能,说明唐古特白刺的最大耐盐浓度为300mmol/L。With Nitraria tangutorum as experimental material,effect of the different concentrations（0,5,10,15,20mmol/L）of exogenous Ca^2＋on stomatal morphology characteristics of Nitratia tangutorum under different concentrations（100,200,300,400 mmol/L）of salt stress were researched.The results showed that the Nitraria tangutorumstomatal length and width were both lower with the increase of NaCl concentration,there was a maximum of stomatal length and width under NaCl concentration for 200mmol/L and Ca^2＋concentration of 10mmol/L,when Ca^2＋concentration was 15mmol/L and salt stress（NaCl≥300mmol/L）,there was a maximum of stomatal length and width.Along with the increase of NaCl concentration,stomatal density of Nitratia tangutorumepidermis decreased gradually,as the exogenous Ca^2＋concentration increasing,stomatal density of Nitratia tangutorumhypodermis under different salt processing showed decreasing after increasing first,each treatment reached maximum with the Ca^2＋concentration（5mmol/L）and NaCl concentration（≤300mmol/L）;stomatal density of Nitratia tangutorumincreased under NaCl concentration（400mmol/L）,but part of porosity development was not mature,some deformation was serious,unable to exercise its function,it indicated that Nitratia tangutorumsuffered the maximum concentration（NaCl 300mmol/L）to salt stress.

关 键 词：盐胁迫 CA^2+ 白刺 气孔 

分 类 号：S793.9[农业科学—林木遗传育种]