Growth and partitioning in Pascopyrum smithii (C3) and Bouteloua gracilis (C4) as influenced by carbon dioxide and temperature

This study investigated how CO2and temperature affect dry weight (d.wt) accumulation, total nonstructural carbohydrate (TNC) concentration, and partitioning of C and N among organs of two important grasses of the shortgrass steppe,Pascopyrum smithii Rydb. (C3) andBouteloua gracilis(H.B.K.) Lag. ex Steud. (C4). Treatment combinations comprised two temperatures (20 and 35�C) at two concentrations of CO2(380 and 750 ?mol mol-1), and two additional temperatures of 25 and 30�C at 750 ?mol mol-1CO2. Plants were maintained under favourable nutrient and soil moisture and harvested following 21, 35, and 49d of treatment. CO2-induced growth enhancements were greatest at temperatures considered favourable for growth of these...

Categories: Publication; Types: Citation, Journal Citation; Tags: Annals of Botany, Bouteloua gracilis, N uptake, Pascopyrum smithii, acclimation to CO2, All tags... blue grama, carbohydrate, climate change, global change, grass, growth, growth temperature optima, nitrogen, western wheatgrass, Fewer tags