Location: Crop Genetics ResearchTitle: Effects of drought and elevated atmospheric carbon dioxide on seed nutrition and 15N and 13C natural abundance isotopes in soybean cultivars under controlled environments
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 7/21/2016
Publication Date: N/A
Technical Abstract: Climate change resulting from global warming is expected to affect crop production and seed quality. The objective of this research was to evaluate the response of soybean cultivars to the effect of drought and elevated temperature on seed composition and mineral nutrition. In a repeated growth chamber experiment, soybean cultivars Williams 82, maturity group, (MG) III and Hutchesson (MG V) were grown under greenhouse conditions until the beginning of seed-fill stage (R5), then trasferred to growth chambers until full maturity (R8). The plants were subjected to the following four treatments (T): T1= plants were grown irrigated and subjected to 360 µmol mol-1 CO2 concentration (ambient concentration); T2= plants were grown irrigated and subjected to 700 µmol mol-1 CO2 concentration; T3= plants were grown under drought and subjected to 360 µmol mol-1 CO2 concentration; T4=plants were grown under drought and subjected to 700 µmol mol-1 CO2 concentration. The drought treatment was imposed by growing plants at a soil water potential of about -150 to -199 kPa. For irrigated plants, soil water potential was kept at about -15 to -20 kPa. Soil water potential was monitored by using soil water potential sensors read by Soil Moisture Meter (WaterMark Company, Inc., Wisconsin, USA). For CO2 treatment, CO2 concentration was supplied by a CO2 cylinder located outside the growth.