(测量)PSK植物胁迫测量套件

  • 2023-01-13 13:05:22
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今天,江南全站登陆 小敏给大家介绍一下(测量)PSK植物胁迫测量套件,以下(测量)PSK植物胁迫测量套件的内容是小敏网上整理,希望对您有用。

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,完全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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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,LED660nm,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0.45kg

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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