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植物胁迫测量套件

简要描述:Y(II)或ΔF/Fm’ 或 (Fm’ – Fs )/Fm’) 是经受时间考验的光适应测量参数,比Fv/Fm对更多类型的植物胁迫更加敏感。已有的大量证据表明Fv/Fm对许多种植物胁迫和健康植物的光系统II的测量十分出色,而Y(II)或光量子产额则可测量实际光照下光适应环境和生理状况的光系统II的效率。

  • 产品型号:PSK
  • 厂商性质:生产厂家
  • 更新时间:2024-01-12
  • 访  问  量:597

详细介绍

  应用
 
  Y(II)或ΔF/Fm’ 或 (Fm’ – Fs )/Fm’) 是经受时间考验的光适应测量参数,比Fv/Fm对更多类型的植物胁迫更加敏感。已有的大量证据表明Fv/Fm对许多种植物胁迫和健康植物的光系统II的测量十分出色,而Y(II)或光量子产额则可测量实际光照下光适应环境和生理状况的光系统II的效率。
 
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        原理
 
  采用调制饱和脉冲原理,测量植物的叶绿素荧光,测量参数包括植物的光量子产额Y(II)及相对电子传递速率ETR,最大光化学效率Fv/Fm,同时还可测量PAR、叶温、相对湿度和叶片吸光率等环境参数。
 
  特点
 
  叶片吸光率测量:提供叶片吸收测量及随环境变化导致的叶片吸收变化。根据Eichelman (2004) 叶片吸收在健康植物的变化范围在0.7~0.9 之间。因此,为获得准确的ETR或“J”,Y(II)测量仪提供了一个可靠的测量方法,
 
  Fv/Fm测量单元:用于暗适应测量。
 
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  先进的PAR叶夹:采用底部叶夹打开装置,防止测量时误操作打开叶夹。对传感器进行余弦校正,确保叶片相对测量光的角度不变。
 
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  Fm’校正:对于具有高光照强度历史的植物,*关闭光反应中心是一个问题,Y(II)测量仪使用Loriaux &Genty 2013的方法进行Fm’ 校正,确保可以测得准确的Fm’ 。
 
  自动调制光设定:快速准确自动的调整合适的调制光强,避免人工操作的误差。
 
  先进算法避免饱和脉冲NPQ:采用25ms内8点的平均值确定Fm、Fm’、Fo、Fs,消除饱和脉冲NPQ的影响和电子噪音。
 
  更精确的叶温测量:采用非接触式红外测量,测量精度可达±0.5℃。
 
  直接测量相对湿度:含有测量气体交换使用的固态传感器,可测量相对湿度。
 
  降低叶片遮挡的设计:倾斜的角度减少对叶片的遮挡,可以测量拟南芥等小叶。
 
  系统组成
 
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标配:
  Y(II)光量子产额测量仪,Fv/Fm测量仪及10个暗适应叶夹,2个电池,2个充电器,一个便携箱,文件U盘。
 
  技术指标
 
  测量参数
 
  Y(II)或ΔF/Fm‘、ETR、PAR、Tleaf、相对湿度、Fms或Fm’、Fs、α(叶片吸收率)、FV/FM、FV/FO,FO, FM, FV。
 
  监测模式:允许长时间监测
 
  技术参数
 
  Y(II): 光适应测量, 稳态光合作用下的环境光
 
  光源
 
  饱和脉冲: LED白光源,使用PAR叶夹时可达7000μmols
 
  调制光:红光,LED 660nm,具有690nm窄通过滤器。
 
  光化光源:环境光
 
  检测方法:脉冲调制法
 
  PAR:测量400-700nm,余弦校正 ±2umols
 
  Fv/Fm:暗适应测量
 
  光源:LED红光饱和光闪,可达6000umols;
 
  调制光:660nmLED 红光,690nm滤波器
 
  调制光可以根据实际测量自动调节到合适的强度,减少手动调节误差,
 
  相对湿度:0%~100%,±2%。
 
  检测器&过滤器:具有700~750nm带通过滤的PIN光电二极管
 
  可选配三脚架。
 
  显示:132 X 30 pixel 液晶显示屏
 
  取样速率:1~10000点/秒自动切换。
 
  测量时间:最短3s或也可设置长期监测模式
 
  存储空间:2GB
 
  输出:USB下载数据,用Excel查看,无需安装其他专用软件
 
  供电:USB锂离子电池(普通充电宝),可用8小时
 
  尺寸:便携箱尺寸为14”x 11”x 6”,仪器为9’’长
 
  质量:Y(II) 测量仪0.45 kg
 
  Fv/Fm测量仪0.36 kg.
 
  加便携箱和附件总重1.95 kg.
 
  工作温度:0℃ ~ 50℃
 
  产地
 
  美国
 
  文献
 
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  Eichelman H., Oja V., Rasulov B., Padu E., Bichele I., Pettai H., Niinemets O., Laisk A. (2004) Development of Leaf Photosynthetic Parameters in Betual pendula Roth Leaves: Correlation with Photosystem I Density, Plant Biology 6 (2004):307-318
 
  Eyodogan F., Oz M. T. (2007) Effect of salinity on antioxidant responses of chickpea seedlings. Acta Physiol Plant (2007) 29:485-493
 
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  Flexas 2000 – “Steady-State and Maximum Chlorophyll Fluorescence Responses to Water Stress In Grape Vine Leaves: A New Remote Sensing System”, J. Flexas, MJ Briantais, Z Cerovic, H Medrano, I Moya, Remote Sensing Environment 73:283-270 Physiologia Plantarum, Volume 114, Number 2, February 2002 , pp. 231-240(10)
 
  Gonias E. D. Oosterhuis D.M., Bibi A.C. & Brown R.S. (2003) YIELD, GROWTH AND PHYSIOLOGY OF TRIMAX TM TREATED COTTON, Summaries of Arkansas Cotton Research 2003
 
  Hendrickson L., Furbank R., & Chow (2004) A simple alternative approach to assessing the fate of absorbed Light energy using chlorophyll fluorescence. Photosynthesis Research 82: 73-81
 
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  Krause G.H., Weis E. (1984) Chlorophyll fluorescence as a tool in plant physiology. II. Interpretation of fluorescence signals. 5, 139-157.
 
  Krupa Z., Oquist G., and Huner N., (1993) The effects of cadmium on photosynthesis of Phaseolus vulgaris – a fluorescence analysis. Physiol Plant 88, 626-630
 
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