应用

Y(II)�?#916;F/FM� � (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、�/p>

原理

采用调制饱和脉冲原理，测量植物的叶绿素荧光，通过相关文献的研究成果，计算植物的光量子产额及相对电子传递速率，同时可测量PAR、叶温、相对湿度等环境参数、�/p>

特点

叶片吸收测量：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�?.7~0.9 之间。因此，为获得准确的ETR或‛�em>J”，Y(II)测量仪提供了一个可靠的测量方法＋�/p>

FV/FM测量单元：可额外选配FV/FM测量仪，用于暗适应测量、�/p>

具有暗适应叶夹

阳光下屏幕可�?/p>

图形显示FV/FM曲线

2GB存储空间

USB通讯

数据Excel查看

先进皃�/strong>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、�/p>

FM’校止�/strong>：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，确保误差*小、�/p>

自动调制光设宙�/strong>：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、�/p>

先进算法避免饱和脉冲NPQ：采�?5ms�?点的平均值确定FM’，消除饱和脉冲NPQ的影响、�/p>

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℃、�/p>

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、�/p>

降低叶片遮挡的设讠�/strong>：倾斜的角度减少对叶片的遮挡，可以测量拟南芥等小叶、�/p>

系统组成

标配９�/p>

Y(II)光量子产额测量仪、充电器、USB电缆、便携箱�?个吸收测量单元、U盘（包含说明书）、�/p>

可选：

FV/FM测量仪及10个暗适应叶夹、三脚架、�/p>

技术指栆�/strong>

测量参数９�/p>

Y(II)�?#916;F/Fm‘、ETR、PAR、T、FMS或FM’、Fs�?#945;(叶片吸收)、�/p>

监测模式：可使用电脑，长时间监测Y(II)、ETR、叶片吸收、PAR、叶温、相对湿度、及计算NPQ、�/p>

相对湿度�?%~95%�?#177;2%、�/p>

可选参数：F_V/F_M、F_V/F_O，F_O� F_M� F_V、�/p>

可使用AC或USB供电，可配三脚架、�/p>

技术参�?/strong>９�/p>

光源

饱和脉冲：白色LED具有PAR�?000��mols

调制光：红色LED 660nm，具�?90nm短波过滤、�/p>

光化光源：仅可使用外部光溏�/p>

检测方法：调制脉冲泔�/p>

检测器&过滤器：具有700~750nm带通过滤的PIN光电二极箠�/p>

取样速率�?~10000�?秒自动切换、�/p>

测量时间�?s或长期监浊�/p>

存储空间�?GB

输出：USB

尺寸：便携箱尺寸�?4”x 11”x 6”，仪器�?’’长

质量：Y(II) 测量�?.45 kg

FV/FM测量�?.36 kg.

总重1.95 kg.

产地

美国

文献

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