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- Aspinwall, Michael J.; Lowry, David B.; Taylor, Samuel H.; Juenger, Thomas E.; Hawkes, Christine V.; Johnson, Mari-Vaughn V.; Kiniry, James R.; Fay, Philip A.
- New phytologist 2013 v.199 pp. 966
- C4 plants; Panicum virgatum; aboveground biomass; carbon nitrogen ratio; chlorophyll; climate; climate change; ecosystems; flowering; genotype; grasses; grasslands; growing season; heritability; latitude; leaves; nitrogen; photosystem II; primary productivity; water use efficiency; Nebraska; Texas
- ... Growth and leaf functional trait variation among genotypes of a geographically widespread dominant species could provide insight into mechanisms of local adaptation and may be important for predicting species and ecosystem responses to environmental change. Under common garden conditions, we grew nine genotypes of the dominant C4-tallgrass prairie species Panicum virgatum L. (switchgrass) represen ...
- McDonald, Megan C.; Oliver, Richard P.; Friesen, Timothy L.; Brunner, Patrick C.; McDonald, Bruce A.
- New phytologist 2013 v.199 pp. 241
- Leptosphaeria nodorum; Phaeosphaeria; Triticum aestivum; Triticum turgidum subsp. durum; center of origin; cultivars; genes; genetic variation; genotype; interspecific hybridization; loci; phylogeny; wheat
- ... Population genetic and phylogenetic studies showed that Phaeosphaeria nodorum is a member of a species complex that likely shares its center of origin with wheat (Triticum aestivum and Triticum durum). We examined the evolutionary history of three known necrotrophic effectors (NEs) produced by P. nodorum and compared them to neutral loci. We screened over 1000 individuals for the presence/absence ...
- Rico, Christopher W.; Pittermann, Jarmila; Polley, H. Wayne; Aspinwall, Michael J.; Fay, Philip A.
- New phytologist 2013 v.199 pp. 956
- Helianthus annuus; carbon dioxide; carbon dioxide enrichment; climate change; evolution; gas exchange; leaves; plant development; plant response; shoots; stomata; stomatal conductance; stomatal movement; translocation (plant physiology); xylem
- ... Plant gas-exchange is regulated by stomata, which co-ordinate leaf-level water loss with xylem transport. Stomatal opening responds to internal levels of CO2 in the leaf but changing CO2 can also lead to changes in stomatal density that influence transpiration. Given that stomatal conductance increases under sub-ambient levels of CO2 and conversely, that plants lose less water at elevated levels, ...