| CO2加富对盐胁迫下黄瓜幼苗叶片光合特性及活性氧代谢的影响 |
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| 引用本文： | 厉书豪,李曼,张文东,李仪曼,艾希珍,刘彬彬,李清明.CO2加富对盐胁迫下黄瓜幼苗叶片光合特性及活性氧代谢的影响[J].生态学报,2019,39(6):2122-2130. |
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| 作者姓名： | 厉书豪 李曼 张文东 李仪曼 艾希珍 刘彬彬 李清明 |
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| 作者单位： | 山东农业大学园艺科学与工程学院;作物生物学国家重点实验室;农业部黄淮海设施农业工程科学观测实验站 |
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| 基金项目： | 国家自然科学基金项目（31471918）；"十二五"国家科技支撑计划项目（2014BAD05B03）；山东省重点研发计划项目（2017CXGC0201）；山东省农业重大应用技术创新项目（鲁财农指[2016]36号） |
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| 摘 要： | 以‘津优35号’黄瓜(Cucumis sativus L.)水培苗为试材,采用裂区设计,主区因素为CO_2浓度处理,设大气CO_2浓度(Symbol{B@400μmol/mol)和CO_2加富(800±40)μmol/mol]2个CO_2浓度水平,裂区因素为盐胁迫处理,用NaCl模拟盐胁迫,设对照(0 mmol/L NaCl)、盐胁迫(80 mmol/L NaCl)2个盐分水平,研究了CO_2加富对盐胁迫下黄瓜幼苗生长、光合特性及活性氧代谢的影响。结果表明:盐胁迫显著抑制黄瓜幼苗的生长,并降低了叶绿素含量、ETR、Φ_(PSII)、核酮糖-1,5-二磷酸羧化酶(RuBPCase)活性及净光合速率;盐胁迫增加了丙二醛及活性氧的累积,与此同时也提高了脯氨酸含量及超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性,但降低了过氧化物酶(POD)活性。CO_2加富显著提高了盐胁迫下黄瓜幼苗的株高、茎粗、叶面积及地上部鲜重,降低了叶绿素a、叶绿素b、类胡萝卜素及叶绿素(a+b)含量,但显著提高了净光合速率和RuBPCase活性,同时降低了气孔导度及蒸腾速率,并且使其具有较高的表观电子传递速率及PSII实际光化学效率;CO_2加富显著提高了盐胁迫下黄瓜幼苗叶片脯氨酸含量及SOD、POD、CAT活性,丙二醛、过氧化氢含量和超氧阴离子产生速率显著降低。综上所述,CO_2加富可通过提高幼苗叶片净光合速率、脯氨酸含量及抗氧化酶活性,降低蒸腾速率、减少丙二醛含量及活性氧的积累,从而缓解盐胁迫对黄瓜植株造成的伤害。
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| 关 键 词： | 黄瓜 盐胁迫 CO2加富 光合特性 活性氧代谢 |
| 收稿时间： | 2017/12/21 0:00:00 |
| 修稿时间： | 2018/10/15 0:00:00 |
Effects of CO2 enrichment on photosynthetic characteristics and reactive oxygen species metabolism in leaves of cucumber seedlings under salt stress |
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| LI Shuhao,LI Man,ZHANG Wendong,LI Yiman,AI Xizhen,LIU Binbin and LI Qingming.Effects of CO2 enrichment on photosynthetic characteristics and reactive oxygen species metabolism in leaves of cucumber seedlings under salt stress[J].Acta Ecologica Sinica,2019,39(6):2122-2130. |
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| Authors: | LI Shuhao LI Man ZHANG Wendong LI Yiman AI Xizhen LIU Binbin and LI Qingming |
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| Institution: | College of Horticulture Science and Engineering, Shandong Agricultural University, Tai''an 271018, China,College of Horticulture Science and Engineering, Shandong Agricultural University, Tai''an 271018, China,College of Horticulture Science and Engineering, Shandong Agricultural University, Tai''an 271018, China,College of Horticulture Science and Engineering, Shandong Agricultural University, Tai''an 271018, China,College of Horticulture Science and Engineering, Shandong Agricultural University, Tai''an 271018, China;State Key Laboratory of Crop Biology, Tai''an 271018, China,State Key Laboratory of Crop Biology, Tai''an 271018, China and College of Horticulture Science and Engineering, Shandong Agricultural University, Tai''an 271018, China;State Key Laboratory of Crop Biology, Tai''an 271018, China;Scientific Observing and Experimental Station of Environment Controlled Agricultural Engineering in Huang-Huai-Hai Region, Ministry of Agriculture, Tai''an 271018, China |
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| Abstract: | |
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| Keywords: | cucumber salt stress CO2 enrichment photosynthetic characteristics reactive oxygen species metabolism |
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