Responses to elevated atmospheric CO₂ concentration and nitrogen supply of Quercus ilex L. seedlings from a coppice stand growing at a natural CO₂ spring

Abstract

-Quercus ilex acorns were collected from a population of trees with a lifetime exposure to elevated atmospheric CO 2 concentration (CO 2 ), and after germination seedlings were exposed at two [

Gas exchange and carbon metabolism in two Prosopis species (Fabaceae) from semiarid habitats: effects of elevated CO2, N supply, and N source

“…A major challenge in predicting plant responses to elevated CO 2 is understanding the complex relationships between these effects and other factors, especially nutrient availability, which plays a central role (Long et al, 2004). For example, numerous observations show that growth responses to elevated CO 2 are lessened or even eliminated under low N nutrition (e.g., Cure et al, 1989;Jackson and Reynolds, 1996;Drake et al, 1997;Stitt and Krapp, 1999;Tognetti and Johnson, 1999;Paul and Foyer, 2001;Ainsworth and Long, 2005;Hu et al, 2005). This effect is the result of the coordination that exists between C and N regulatory systems in the plant (Rufty, 1997).…”