Physiological and Transcriptome Responses to Elevated CO2 Concentration in Populus

Global climate change is heavily affected by an increase in CO2. As one of several efforts to cope with this, research on poplar, a representative, fast growing, and model organism plants, actively underway. The effects elevated atmospheric CO2 the metabolism, growth, transcriptome poplar were investigated predict productivity environment where concentrations are increasing. Poplar trees grown at ambient (400 ppm) or (1.4× ambient, 560 ppm, 1.8× 720 for 16 weeks open-top chambers (OTCs). We analyzed differences transcriptomes Populusalba × Populus glandulosa clone “Clivus” euramericana “I-476” using high-throughput sequencing techniques elucidated functions differentially expressed genes (DEGs) various functional annotation methods. About 272,355 contigs 207,063 unigenes obtained from assembly Trinity package. Common DEGs identified which consistently regulated both concentrations. In Clivus 29, common found, most these correspond cell wall proteins, especially hydroxyproline-rich glycoproteins (HRGP), related fatty acid metabolism. Concomitantly, I-476, 25 identified, they heat shock protein (HSP) chaperone family, photosynthesis, nitrogen carbon addition, carbohydrate contents, including starch total soluble sugar, significantly increased response These data should be useful future gene discovery, molecular studies, tree improvement strategies upcoming increased-CO2 environments.