||Ozone Decreases Spring Root Growth and Root Carbohydrate Content in Ponderosa Pine the Year Following Exposure.
Andersen, C. P. ;
Hogsett, W. E. ;
Wessling, R. ;
Plocher., M. ;
||Corvallis Environmental Research Lab., OR. ;NSI Technology Services Corp., Corvallis, OR.
Air pollution effects(Plants) ;
Pine trees ;
Root development ;
Plant physiology ;
Seasonal variations ;
Period of growth ;
Plant growth ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Storage carbohydrates are extremely important for new shoot and root development following dormancy or during periods of high stress. The hypothesis that ozone decreases carbohydrate storage and decreases new root growth during the year following exposure was investigated. The results suggest that (1) ponderosa pine seedlings exposed to 122 and 169 ppm hrs ozone for one season have significantly less root starch reserves available just prior to and during bud break the following year, and (2) spring root growth is decreased following ozone exposure. The carry-over effects of ozone stress may be important in long-lived perennial species which are annually subjected to ozone.
||Pub. in Canadian Jnl. of Forest Research, v21 p1288-1291 1991. Prepared in cooperation with NSI Technology Services Corp., Corvallis, OR.
|NTIS Title Notes
||Reprint: Ozone Decreases Spring Root Growth and Root Carbohydrate Content in Ponderosa Pine the Year Following Exposure.
||68A; 57C; 48D
||PC A02/MF A01