Browsing by Author "Muller, Onno"
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- Common bean (phaseolus vulgaris l.) mineral profile is negatively affected by elevated atmospheric carbon dioxide (CO2)Publication . Duarte, Rafael D. C.; Silva, Marta Nunes da; Quirós-Vargas, Juan; Muller, Onno; Vasconcelos, Marta W.
- Common bean (Phaseolus vulgaris L.) nutritional profile & soil microbiome community is affected by elevated atmospheric carbon dioxide (CO2)Publication . Duarte, Rafael D. C.; Silva, Marta Nunes da; Quirós-Vargas, Juan; Muller, Onno; Vasconcelos, Marta W.
- Effects of short-term exposure to elevated atmospheric CO2 on yield, nutritional profile, genetic regulatory pathways, and rhizosphere microbial community of common bean (Phaseolus vulgaris)Publication . Duarte, Rafael D. C.; Silva, Marta Nunes da; Fortunato, Gianuario; Quirós-Vargas, Juan; Muller, Onno; Manaia, Célia M.; Vasconcelos, Marta W.Aim: Legumes are vital to agroecosystems and human nutrition, yet climate change is compromising their nutritional value. This study aims to assess how a one-month exposure to elevated CO2 (eCO2) impacts biomass yield, mineral profile, gene expression, and the soil microbiome of common bean plants (Phaseolus vulgaris L.). Methods: Phaseolus vulgaris L. was grown in field conditions under ambient CO2 (control, aCO2, 400 ppm) or eCO2 (600 pm) from the start of pod filling until plant maturity and analyzed for several morphophysiological and nutritional parameters. Results: Compared with aCO2, eCO2 exposure significantly increased plant and grain biomass, with fluctuations in mineral accumulation. Notably, it decreased grain iron and zinc concentrations, two essential microelements related to food security, by 59% and 49%, respectively. Additionally, grain phenolic content decreased by up to 41%. Genes involved in mineral uptake (such as FER1, ZIP1, and ZIP16), plant response to stress (TCR1, TCR2, and HLH54) and symbiosis with soil microorganisms (NRMAP7 and RAM2) seemed to regulate effects. Microbiome analysis supported these findings, with an increase in the relative abundance of Pseudomonadota by 10%, suggesting eCO2-induced alterations in microbial community structure. Conclusions: This research demonstrates how eCO2 impacts the nutritional quality of common beans regarding micronutrients and phenolic content, while also affecting soil microbiome composition. Highlighting the value of shorter term eCO2 treatments, the findings provide early insights into immediate plant responses. This underscores the need for crop improvement strategies to address nutrient deficiencies that may arise under future eCO2 conditions.
- Genotypic variation in the response of soybean to elevated CO2Publication . Soares, José C.; Zimmermann, Lars; Santos, Nicolas Zendonadi dos; Muller, Onno; Pintado, Manuela; Vasconcelos, Marta W.The impact of elevated CO2 (eCO2) on soybean productivity is essential to the global food supply because it is the world's leading source of vegetable proteins. This study aimed to understand the yield responses and nutritional impact under free-air CO2 enrichment (FACE) conditions of soybean genotypes. Here we report that grain yield increased by 46.9% and no reduction in harvest index was observed among soybean genotypes. Elevated CO2 improved the photosynthetic carbon assimilation rate, leaf area, plant height, and aboveground biomass at vegetative and pod filling stages. Besides the positive effects on yield parameters, eCO2 differentially affected the overall grain quality. The levels of calcium (Ca), phosphorous (P), potassium (K), magnesium (Mg), manganese (Mn), iron (Fe), boron (B), and zinc (Zn) grain minerals decreased by 22.9, 9.0, 4.9, 10.1, 21.3, 28.1, 18.5, and 25.9% under eCO2 conditions, respectively. Soluble sugars and starch increased by 9.1 and 16.0%, respectively, phytic acid accumulation increased by 8.1%, but grain protein content significantly decreased by 5.6% across soybean genotypes. Furthermore, the antioxidant activity decreased by 36.9%, but the total phenolic content was not affected by eCO2 conditions. Genotypes, such as Winsconsin Black, Primorskaja, and L-117, were considered the most responsive to eCO2 in terms of yield enhancement and less affected in the nutritional quality. Our results confirm the existence of genetic variability in soybean responses to eCO2, and differences between genotypes in yield improvement and decreased sensitivity to eCO2 in terms of grain quality loss could be included in future soybean selection to enable adaptation to climate change.
- Intraspecific effects of short-term elevated atmospheric co2 in yield and nutritional profile of phaseolus vulgarisPublication . Duarte, Rafael D. C.; Silva, Marta Nunes da; Quirós-Vargas, Juan; Muller, Onno; Vasconcelos, Marta WiltonLegumes are key contributors of essential nutrients for human health, namely iron (Fe) and zinc (Zn), but they are one of the most sensitive plant families to elevated concentrations of atmospheric CO2 (eCO2), a major threat to global agriculture and human nutrition. Therefore, unravelling the effects underlying eCO2 responses on biomass yield and nutritional value is of utmost importance to anticipate potential negative effects on human nutrition and expedite mitigation strategies.
- Leaf photosynthesis and yield components of several bean genotypes under free-Air CO2 enrichmentPublication . Soares, Jose; Deuchande, Teresa; Muller, Onno; Vasconcelos, Marta
- Phenotyping soybean and common bean for better growth and nutrition under elevated CO2Publication . Vasconcelos, Marta W.; Deuchande, Teresa; Soares, João; Nunes, Fábio; Muller, Onno; Pintado, M. E.