Measurement of Gas Exchange Characteristics of Developing Wheat in the Biomass Production System

2000-01-2292

07/10/2000

Event
International Conference On Environmental Systems
Authors Abstract
Content
The PESTO (Photosynthesis Experiment and System Testing and Operation) spaceflight experiment is designed to directly measure gas exchange of developing stands of wheat (Triticum aestivum L.) on the International Space Station (ISS). Gas exchange measurements will characterize photosynthesis and transpiration in microgravity at different stages of development. The Biomass Production System (BPS), a double middeck-sized plant growth will be the plant growth hardware used to support this experiment on-board ISS. This report presents results from a 10-day functional test of PESTO protocols in the BPS.
Wheat canopy CO2 assimilation rate for 14-24 day-old plants grown in the BPS chambers was 6-7 μmol m-2 s-1 during this test. Plant responses to CO2 and photosynthetic photon flux (PPF) response curves were obtained at different stages of development by altering CO2 and light conditions. PPF response curves were linear (r2=0.99) over the range evaluated, and the estimated light compensation point was 103 μmol m-2 s-1. The CO2 compensation point was between 95 and 125 μmol mol-1. Transpiration rates of approximately 3.8 L m-2 day-1 were estimated for 20-day-old plants from water additions to the plant root zone.
Meta TagsDetails
DOI
https://doi.org/10.4271/2000-01-2292
Pages
8
Citation
Stutte, G., Monje, O., Goins, G., and Chapman, D., "Measurement of Gas Exchange Characteristics of Developing Wheat in the Biomass Production System," SAE Technical Paper 2000-01-2292, 2000, https://doi.org/10.4271/2000-01-2292.
Additional Details
Publisher
Published
Jul 10, 2000
Product Code
2000-01-2292
Content Type
Technical Paper
Language
English