Previous research shows that high night temperatures between 70 to 80 °F increased soybean plants’ respiration, and reduced soybean’s photosynthesis, N content, biomass and yield. This project studies if there is genotypic variation in response to high night temperatures, and if so, which soybean characteristics are responsible for that tolerance. During the night temperature stress, research will assess cultivar’s physiological status by measuring plant’s photosynthesis, respiration, nitrogen content, nitrogen fixation and chlorophyll content, to relate them with yield loss at high night temperatures. A future goal is to extrapolate the project to the field.

Key Benefactors:
farmers, agronomists, Extension agents, soybean breeders, seed companies