Influence of ozone stress on soybean response to carbon dioxide enrichment. III. Yield and seed quality

• Published in: Crop science 1998-01, Vol.38 (1), p.128-134
• Main Authors: Heagle, A.S, Miller, J.E, Pursley, W.A
• Format: Article
• Language: English
• Subjects: ACEITES VEGETALES; ACIDE LINOLEIQUE; ACIDE LINOLENIQUE; ACIDE OLEIQUE; ACIDE PALMITIQUE; ACIDE STEARIQUE; ACIDO ESTEARICO; ACIDO LINOLEICO; ACIDO LINOLENICO; ACIDO OLEICO; ACIDO PALMITICO; Agricultural and forest climatology and meteorology. Irrigation. Drainage; Agricultural and forest meteorology; Agricultural production; Agronomy. Soil science and plant productions; Biological and medical sciences; CALIDAD; Carbon dioxide; CARBON DIOXIDE ENRICHMENT; CHEMICAL COMPOSITION; Climatology, meteorology; COMPOSICION QUIMICA; COMPOSITION CHIMIQUE; CONTENIDO PROTEICO; CRECIMIENTO; CROISSANCE; CROP YIELD; CULTIVARS; ENRICHISSEMENT EN GAZ CARBONIQUE; ENRIQUECIMIENTO EN GAS CARBONICO; ESTRES; Experiments; FRUIT; FRUTO; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; Generalities. Techniques. Climatology. Meteorology. Climatic models of plant production; GLYCINE MAX; GRAINE; GROWTH; HUILE VEGETALE; LINOLEIC ACID; LINOLENIC ACID; Non agrochemicals pollutants; OLEIC ACID; OZONE; OZONO; PALMITIC ACID; PESO; PESO DE LAS SEMILLAS; Phytopathology. Animal pests. Plant and forest protection; PLANT OILS; PODS; POIDS; POIDS DES SEMENCES; Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors; Pollution effects. Side effects of agrochemicals; PROTEIN CONTENT; QUALITE; QUALITY; RENDEMENT DES CULTURES; RENDIMIENTO DE CULTIVOS; SEED OILS; SEED WEIGHT; SEEDS; SEMILLA; Soybeans; STEARIC ACID; STEMS; STRESS; TALLO; TENEUR EN PROTEINES; TIGE; Troposphere; VARIEDADES; VARIETE; VARIETIES; WEIGHT
• ISSN: 0011-183X; 1435-0653
• DOI: 10.2135/cropsci1998.0011183X003800010022x

Ozone in the troposphere can cause plant stress, whereas elevated CO2 generally causes positive responses. Little is known of how these gases interact to affect plant response. Interactive effects on yield and seed quality of soy bean [Glycine max (L.) Merr.] grown in 14-L pots were measured in open-top field chambers. Essex was tested in 1993, and Essex, Holladay, and NK 6955 were tested in 1994. Plants were exposed from emergence to maturity to four CO2 levels (ambient and 1.3, 1.6, and 2.0 times ambient) and three O3 levels (0.4, 0.9, and 1.5 times ambient) in 12 combinations. Increasing O3 suppressed growth and yield, whereas CO2 enrichment stimulated growth and yield. Carbon dioxide-induced stimulation was greater for plants stressed by O3 than for non stressed plants. For example, CO2 at 2.0 times ambient increased 2-yr mean seed yield of Essex by 16, 24, and 81% at O3 levels of 0.4, 0.9, and 1.5 times ambient, respectively. Effects of O3 and CO2 on seed oil content were variable with numerous cultivar differences. Seed protein content was never affected. Elevated O3 suppressed oleic acid content in seeds, whereas CO2 increased it; the nature of the O3 X CO2 interaction for oleic acid was similar to that observed for most yield measures. Carbon dioxide-induced stimulation of plants stressed by O3 was apparently caused partly by amelioration of O3 stress. Interactions between O3 and CO2 must be considered for proper interpretation of cause-effect relationships in CO2 enrichment studies