Diurnal Rhythm of different plants


We test, if there is a diurnal rhythm in photosynthesis in different types of plants. Plants are exposed to a 12h/12h light/dark rhythm and continious light exposure by a LED grow lamp. Temperature is about 25°C/15°C day/night.

2 Leaves from every plant type are measured three times at different times of the day


Leaf Photosynthesis MultispeQ V1.0


Measures many photosynthesis-related parameters in <15 seconds, including:

  • Chlorophll Fluorescence: Phi2, PhiNPQ, PhiNO, NPQt, qL, LEF
  • Relative Chlorophyll: SPAD
  • Proton Motive Force: ECSt, vH+, gH+
  • Absorbance at: 450, 535, 605, 650, 730, 850, 880, and 940nm.
  • Leaf Thickness (in mm), angle, and cardinal direct...


  1. Plant type (Multiple Choice)
  2. Leaf Number (Multiple Choice)
  3. Measurement No. (Multiple Choice)
  4. Light type (Multiple Choice)



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