The Q-Box CO650 Plant CO2 Analysis Package has been designed for measurements of photosynthesis, respiration and transpiration in attached or detached leaves placed in a flow-through leaf chamber. The Plant CO2 Analysis Package can be used in both the lab or field (with optional battery pack). When combined with the 4 channel Qubit Gas Switching System Q-Box CO650 can monitor photosynthesis, respiration and transpiration on up to 3 leaves (channel 1 is a reference).
Operation of the Q-Box CO650 Plant CO2 Analysis Package employs the use of an infrared CO2 gas analyzer (Q-S151) to measure, at different times, the concentration of CO2 in a gas entering a leaf chamber, and the concentration of CO2 in the same gas after it leaves the chamber. The difference between influx and efflux CO2 concentrations (differential CO2) when the leaf is exposed to light, plus a measurement of the flow of gas through the chamber, allow calculation of photosynthetic CO2 fixation rate. The method can also be used to measure CO2 evolution from the leaf in the dark (dark respiration).
The Q-Box CO650 includes a Humidity/Temperature sensor (Q-S161) which measures relative humidity of the air before and after it has passed through the leaf chamber plus temperature at the RH sensor. The RH differential between influx and efflux gas, the temperature, and the flow rate through the leaf chamber, allow calculation of leaf transpiration rates.
An LED Light Source (A113) supplies photosynthetically active radiation to the leaf with minimum heat load. The LED light source can deliver approximately 1200 µmol photons/m2/s at maximum output and it is supplied calibrated (in the software) so light intensity can be accurately set without the use of a light meter. For calculations of leaf conductance, leaf temperature measurements are required and these are obtained by the S173 Leaf Thermistor that is fitted in the bottom portion of the leaf chamber for measurements of leaf temperature during experiments. The same thermistor can also measure air temperature inside the leaf chamber when not touching the leaf. Analog signals from all of the sensors are converted to digital signals via two integrated LabQuest mini interfaces (6 channels). Data is displayed, recorded and manipulated on a PC or Macintosh computer using Logger Pro software.
For Multichannel measurements of photosynthesis and transpiration consider adding QUBIT GAS SWITCHING SYSTEM to Q-Box CO650 Plant CO2 Analysis Package
Modular Gas Exchange Measuring System
Components interchangeable with other Q-Box Packages
Housed in rugged box for easy transport and set up
Use in a lab or Field (with optional battery pack)
Photosynthetic CO2 Exchange Rate
Water Use Efficiency
Dark Respiration Rate
Leaf, Root and Whole Plant Studies
Q-A101 laboratory stand (free standing or integrated into Q-Box)
A113 LED Light Source
Q-P103 Gas pump (1L/min no load)
G112 Flow Through Leaf Chamber
G122 Large Gas Bags (2)
Q-G266 Flow Monitor (0-1L/min)
Q-S151 CO2 Analyzer (0-2000ppm) (Includes CO2 and H2O scrubbers)
Q-S161 RH/temperature sensor
S173 Leaf Thermister
C610 two integrated LabQuest Mini data interfaces
C901 Logger Pro Software
C404 Customized Setup Files
Q-Box Accessory Kit
Rugged Water-proof case housing the sensors and analyzers
individual power supplies for stand alone use of the sensors and analyzers