时间:2018-11-14
作者:易科泰
点击量:
简介:
LCi-T 便携式光合仪是最小巧、轻便的便携式光合作用测定仪,用以测量植物叶片的光合速率、蒸腾速率、气孔导度等与植物光合作用相关的参数。仪器应用IRGA(红外气体分析)原理,精密测量叶片表面CO2浓度及水分的变化情况来考察叶片与植物光合作用相关的参数。特殊的设计可在高湿度、高尘埃环境使用。既可在研究中使用,又是很好的教学仪器。
上图左为全套光合仪主机配件及便携箱等,上图中为光合仪主机和手柄,上图右为操作人员进行野外实验
应用领域
技术特点
上图为英国剑桥大学植物科学系M. Davey博士在南极洲对藻类光合作用研究时的工作图片,因LC系列光合仪轻便小巧,坚固耐用,续航持久等特点被列为首选。
技术指标
1)测量参数包括F0、Ft、Fm、Fm’、QY_Ln、QY_Dn、NPQ、Qp、Rfd、RAR、Area、M0、Sm、PI、ABS/RC等50多个叶绿素荧光参数,及3种给光程序的光响应曲线、2种荧光淬灭曲线、OJIP曲线等
2)高时间分辨率,可达10万次每秒,自动绘出OJIP曲线并给出26个OJIP-test测量参数包括F0、Fj、Fi、Fm、Fv、Vj、Vi、Fm/F0、Fv/F0、Fv/Fm、M0、Area、Fix Area、Sm、Ss、N、Phi_P0、Psi_0、Phi_E0、Phi-D0、Phi_Pav、PI_Abs、ABS/RC、TR0/RC、ET0/RC、DI0/RC等
1)宽叶叶室:长×宽为2.5×2.5cm,适用于阔叶及大多数叶片类型
2)窄叶叶室:长×宽为5.8×1cm,适用宽度小于1cm的条形叶
3)针叶叶室:长约69mm,直径47mm,适用于簇状针叶(白光光源)
4)小型叶叶室:叶室直径为16.5mm,测量面积2.16cm2
5)土壤呼吸/小型植物室:测量测量土壤呼吸,或者高度低于55mm的整株草本植物光合作用,底面直径为11cm
6)多功能测量室:长×宽×高为15×15×7cm,分为上下两部分,上部测量小型植物光合作用,下部分测量土壤呼吸
7)果实测量室:上下两部分组成,上部透明,下部为金属,可测量果实最大直径为11cm,最大高度为11.5cm
8)冠层测量室:底面直径12.7cm,高12.2cm,适用于地表冠层
9)荧光仪联用适配器:适用于连接多种叶绿素荧光仪
上图从左到右依次为针叶室、果实测量室、土壤呼吸室、多功能测量室、冠层室
典型应用
Leaf life span optimizes annual biomass production rather than plant photosynthetic capacity in an evergreen shrub, Marty C. et al. 2010, New Phytologist, 187(2): 407-416
本文研究了Rhododendron ferrugineum(高山玫瑰杜鹃,杜鹃属模式种)净光合能力与叶片寿命的关系,发现有更多较老叶片的种群其光合能力更强(图中深色区域为一年叶片和二年叶片)。
产地:英国
选配技术方案
参考文献(仅列出部分代表性文献)
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