Aspen Bibliography
Nitrogen supply as a limiting factor determining the sensitivity of Populus tremuloides Michx. to ozone stress
Document Type
Article
Journal/Book Title/Conference
New Phytologist
Volume
130
Issue
3
First Page
437
Last Page
446
Publication Date
1995
Abstract
Seedlings of trembling aspen {Populus tremuloides Michx.) were grown at six rates of supplemental nitrogen (N). Five of the N rates were sub-optimal to optimal for growth, whilst the sixth provided an excess of N with no additional growth benefit. T h e biomass of plants stressed b y ozone (O3) in open-top chambers was significantly reduced at optimal rates of N. Plants which received sub-optimal or excess N showed no significant effects of O., on hiomass accumulation. Ozone induced two compensatory responses; increased shoot/root ratio and accelerated senescence, at all N rates. Growth rate was strongly influenced by the amount o f N supplied, and O.,-induced reductions in total biomass were highly correlated with growth rate. W e concluded that when growth rate was small as a result of N limitation, compensatory responses to O,, stress were sufficient to prevent detectable losses in biomass.
Recommended Citation
Pell, E.J.; Sinn, J.P.; and Johansen, C.V., "Nitrogen supply as a limiting factor determining the sensitivity of Populus tremuloides Michx. to ozone stress" (1995). Aspen Bibliography. Paper 1881.
https://digitalcommons.usu.edu/aspen_bib/1881