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Fig. 1 | Plant Methods

Fig. 1

From: An in situ approach to characterizing photosynthetic gas exchange of rice panicle

Fig. 1

A custom-built panicle photosynthesis chamber (P-chamber) for panicle gas exchange measurements. a An illustration of how the P-chamber works together with the gas analyzer Li-6400 to measure the photosynthetic and respiratory rates of a rice panicle. b The setting of a P-chamber in a paddy field. c An illustration of design of the P-chamber. d A top-down view of the inner part of the P-chamber. e The homogeneity of PFD in the chamber. f Spectrum of the LED light source. g The difference between the CO2 concentration in the P-chamber and the set CO2 concentration ([CO2R]) in the reference pipe at different time after closure of the P-chamber. h Recorded photosynthetic gas exchange rate of a rice panicle under a photon flux density (PFD) of 2000 μmol (photons) m−2 s−1 followed by dark treatment. Letters in panel (a) and (b): a Battery; b Wires; c Voltage adaptor; d Switch; e Mixing fan (inside the chamber body); f Digital displayed voltmeter; g Cooling fan; h LED array; i Chamber body; j Hasp; k Sealing strip; l Rice panicle; m Cooling fin; n Clamp. The horizontal lines in panel (g) represent mean values of the last 10 data points. The y-axis in panel (g) is log-scaled

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