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文章摘要
引用本文:
缺氮对槟榔幼苗叶片光合特性的影响
Effects of Nitrogen Deficiency on the Photosynthetic Characteristics of Areca catechu L Seedling Leaves
投稿时间:2020-04-23  修订日期:2020-07-09
DOI:
中文关键词: 缺氮胁迫  槟榔苗  生长状态  叶绿素含量  光合特性  
英文关键词: nitrogen deficiency stress  Areca catechu L seedling  growth state  chlorophyll content  photosynthetic characteristics
基金项目:国家自然科学基金(31960064),海南省科技重大专项研究基金(ZDKJ201817),海南大学热带农林学院农学研究生创新项目(ZWCX2018006)。
作者单位E-mail
崔闯 海南大学 热带作物学院 1605133602@qq.com 
吴娇 海南大学 热带作物学院  
刘东峻 海南大学 热带作物学院  
黄书怡 海南大学 热带作物学院  
万迎朗 海南大学 热带作物学院 ylwan@hainanu.edu.cn 
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中文摘要:
      本文以槟榔苗为实验材料,通过缺氮处理,观测槟榔苗生长状态;测定生物量、叶绿素含量、叶绿素荧光参数,并结合气体交换指标,分析了缺氮胁迫对槟榔幼苗叶片光合特性的影响。结果表明,与对照(CK)相比,缺氮胁迫下,槟榔苗地上部矮小,叶片发黄,生物量降低但差异不显著;而地下部根系发达,根冠比显著升高。缺氮处理的槟榔苗各叶序叶片叶绿素a、b含量均显著低于对照,且叶绿素b含量降低幅度更大。缺氮胁迫还导致槟榔苗各叶序叶片的光合速率、蒸腾速率、气孔导度、最大光化学效率(Fv/Fm)、实际光化学效率Y(Ⅱ)、光化学淬灭参数qP均显著下降,而细胞间CO2浓度、非光化学淬灭参数NPQ显著上升。缺氮胁迫还导致槟榔苗各叶序叶片的叶肉细胞密度显著低于对照。本研究将为今后深入研究供氮水平对槟榔光合特性影响等相关问题提供一定基础。
英文摘要:
      SThe growth status and leaf microstructure of areca palm seedlings were observed by nitrogen deficiency treatment.The effects of nitrogen deficiency stress on photosynthetic characteristics of areca palm seedling leaves were analyzed by measuring biomass, chlorophyll content, chlorophyll fluorescence parameters and gas exchange index. The results showed that compared with CK, the growth status of areca seedlings under nitrogen deficiency stress was significantly affected.The phyllotaxis leaf chlorophyll content decreased significantly, photosynthetic rate, transpiration rate, stomatal conductance and the maximal photochemical efficiency (Fv/Fm), actual photochemical efficiency Y (Ⅱ) and photochemical quenching coefficient qP have dropped significantly, and the intercellular CO2 concentration, the non-photochemical quenching coefficient NPQ increase significantly; The density of mesophyll cells in leaf order leaves of areca seedlings was significantly lower than that of the control group. The results showed that the synthesis of chlorophyll, the activity of PSII reaction center, the photosynthetic efficiency and the biomass of areca seedlings were inhibited by nitrogen deficiency. This study will provide a basis for further study on the effects of nitrogen supply on the photosynthetic characteristics of areca.
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