| 摘要: |
| [目的]探讨叶面喷施5-氨基乙酰丙酸(ALA)对红掌光合作用及叶绿素荧光参数的影响,为花卉植物上合理施用ALA奠定基础.[方法]选择3组红掌,每组60株,自2007-07-15～10-30,每15 d每组叶面分别喷施1次0(清水),200和400 mg/L的ALA,利用Li-6400光合测定系统和Li-6400-40荧光叶室分别测定不同质量浓度ALA处理对红掌叶片光合作用及叶绿素荧光参数指标的影响.[结果]与对照相比,200和400 mg/L ALA处理的红掌叶片叶绿素总量均极显著(P<0.01)提高,提高幅度分别为6.7%和8.5%;1 d中(8:00～18:00)的光合速率显著提升,在较高光辐射强度下,光合速率的提高更为明显;初始荧光(Fo)极显著(P<0.01)地降低,降低幅度分别为7.5%和10.4%; 最大荧光(Fm)、可变荧光(Fv)、最大光化学效率(Fv/Fm)、潜在光化学效率(Fv/Fo)、光能获取能力(1/Fo-1/Fm)依次提高0.3%和0.7%,2.5%和3.8%,2.2%和3.1%,10.7% 和15.8%,10.4%和15.0%,差异达极显著(P<0.01)或显著(P<0.05)水平;200和400 mg/L ALA处理对有效光化学速率(Fv′/Fm′)的影响不显著(P>0.05),但可使ФPSⅡ分别提高42.4%和66.7%,NPQ分别提高2.1%和3.3%,qP分别提高43.0%和67.7%,差异均达显著水平(P<0.05);可使PCR分别降低13.9%和40.0%,ETR分别提高37.1%和61.9%,差异均达极显著水平(P<0.01).[结论]喷施ALA 可以提高红掌叶片的光化学效率,对降低不良环境的胁迫有积极作用,因而其可以在红掌上施用. |
| 关键词: 红掌 5-氨基乙酰丙酸(ALA) 光合速率 叶绿素荧光 |
| DOI： |
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| 基金项目:日本COSMO公司资助项目 |
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| Effects of ALA treatment on photosynthetic and chlorophyII fluorescence dynamics of Anthurium andraeanum |
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| Abstract: |
| 【Objective】 The paper studied the effect of 5-aminolevulinic acid (ALA) on chlorophyll a, photosynthetic rate and chlorophyll fluorescence dynamics of Anthurium andraeanum.【Method】3 Anthurium andraeanumgroups including 180 plants were treated every 15 days with different content of ALA,0,200 and 400 mg/L,during 15,July to 30,October 2007.Photochemistry rate and chlorophyll fluorescence of its leaves were measured with Li-6400 photosynthetic measure system and Li-6400-40 chlorophyll fluorometer respectively.【Result】 ALA application with 200 and 400 mg/L ALA,compared with the control (0 mg/L ALA), decreased the minimal fluorescence (Fo) by 7.5% and 10.4%,the photochemistry rate (PCR) 13.9% and 40.0%,increased the content of chlorophyll a by 6.7% and 8.5%,photosynthetic rate by 11.8% and 18.4%,the maximal fluorescence (Fm) 0.3% and 0.7%,the variable fluorescence (Fv) 2.5% and 3.8%,the PSⅡ maximal photochemical efficiency (Fv/Fm) 2.2% and 3.1%, the potential photochemical efficiency (Fv/Fo) 10.7% and 15.8%,the ability of PSⅡ reaction center to trap energy from antenna pigment (1/Fo-1/Fm ) 10.4% and 15.0%,PSⅡ actual photochemical efficiency (PhiPS2) 42.4% and 66.7%,the electron transfer rate (ETR) 37.1% and 61.9%,the non-photochemical quench (NPQ)2.1% and 3.1%,photochemical quench (qP) 43.0% and 67.7% respectively.【Conclusion】 The data presented in the paper suggested that ALA treatment might increase photosynthetic rate and enhance the ability to adapt to adverse environment for Anthurium andraeanum. |
| Key words: Anthurium andraeanum 5-aminolevulinic acid (ALA) photosynthetic rate chlorophyll fluorescence |
