Field Phenotyping and an Example of Proximal Sensing of Photosynthesis Under Elevated CO2

摘要

Field phenotyping conceptually can be divided in five pillars 1) traits of interest 2) sensors to measure these traits 3) positioning systems to allow high-throughput measurements by the sensors 4) experimental sites and 5) environmental monitoring. In this paper we will focus on photosynthesis as trait of interest, measured by remote active fluorescence in `BreedFACE', an infrastructure for field phenotyping under elevated CO<sub>2</sub> (eCO<sub>2</sub>). The sensor used is the Light Induced Fluorescence Transient (LIFT) device mounted on a manual operated field4cycle positioning system. In direct response to eCO<sub>2</sub> at 600ppm for winter wheat, NDVI and photosynthetic efficiency (Fq`/F_m') did not change whereas the QA reoxidation efficiency (F_r2/F_m) decreased at eCO₂. This study further demonstrates the completion of BreedFAce with an example of proximal sensing of photosynthetic traits by the LIFT.