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Preliminary photosynthesis measurements of selected wheat cultivars prior to inoculation

Preliminary photosynthesis measurements of selected wheat cultivars prior to inoculation. Dr. Ferenc Horváth Dr. Barnabás Wodala. The LI-6400 Portable Photosynthesis System. The LI-6400 Portable Photosynthesis System. The LI-6400 Portable Photosynthesis System. An open system.

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Preliminary photosynthesis measurements of selected wheat cultivars prior to inoculation

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  1. Preliminary photosynthesis measurements of selected wheat cultivars prior to inoculation Dr. Ferenc HorváthDr. Barnabás Wodala

  2. The LI-6400 Portable Photosynthesis System

  3. The LI-6400 Portable Photosynthesis System

  4. The LI-6400 Portable Photosynthesis System

  5. An opensystem In an open system, photosynthesis and transpiration are computed from the differences in CO2 and H2O between in-chamber conditions and pre-chamber conditions.

  6. Schematicwithout a CO2 mixer

  7. Schematicwith a CO2 mixer

  8. IRGA (InfraRed Gas Analizator) CO2measurement: 4,26 μm H2O measurement: 2,59 μm Infraredlightsource (widespectrum) Gasinlet Gasoutlet Filter Detector Measuringbox Signalprocessing Indicator

  9. Matching

  10. Incoming concentrations must be stable breath, for example, is typically 30000 μmol CO2 (mol air)-1 Ambient air contains360μmol CO2 (mol air)-1

  11. Light Reflectedlight Mehlerreaction ETR PSI PSII ΦPSII Photosynthesis Transmittedlight Photorespiration Chlorophyll a fluorescence Heatdissipation

  12. Settinguptheinstrument (Licor 6400, an openpathgasexchangesystem) 4 selectedwheatgenotypes (1 weekbeforetheinfection) PARout: sunny, dependsonangle, 600 – 1800 µmolphoton m-2 s-1 PARin: fixed, 1000 µmolphoton m-2s-1 (10% blue, 90% red) Tair: 27-29 °C Tleaf: 25-27 °C preliminary measurements

  13. Calculatedparameters

  14. Thankyouforyourattention!

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