Red spruce (Picea rubens Sarg.) growth and reproduction is declining in many areas of the eastern United States (Klein and Perkins, Bot. Rev. 54, 1-43, 1988). An often cited cause of this decline is air pollution. In this study simulated acid rain was used to examine the effects of low pH on the female reproductive structures of five red spruce trees showing no signs of pollution damage. Cone scale weight, seed weight, number of seeds per cone, and per cent germination of filled seed did not differ significantly among the acid rain treatments. The percentage of filled seed per cone was significantly reduced as the pH of the simulated rain solutions declined. © 1990
The purpose of this research was to test the effect that acid rain had on the growth of plants. With...
Two-year-old spruce (Picea rubens Sarg.) seedlings were exposed to acid mists containing equimolar a...
The pollens of apple flowers have been treated with simulated acid rain solutions in range of pHs 2....
Red spruce (Picea rubens Sarg.) growth and reproduction is declining in many areas of the eastern Un...
Acid deposition, a side effect of human advances in industrial and agricultural technology, is now k...
Two stands of red spruce (Picea rubens Sarg.) trees growing in close proximity to each other on Whit...
Two-year-old red spruce seedlings [Picea rubens Sarg. syn. P. rubra (Du Roi) Link] were subjected to...
Acidified precipitation may affect the productivity of forests by altering the availability of plant...
Widespread forest decline has been documented in Europe and NE-U.S.A. (Johnson,1987; Woodman, 1987)....
Artificial acid rain (pH 2,3,4, and 5) was treated on the seeds of six woody species to examine its...
Successful fruit set depends on several reproductive processes including pollen germination and lube...
Successful fruit set depends on several reproductive processes including pollen germination and lube...
Mature trees of a single clone of Sitka spruce (Picea sitchensis (Bong.) Carr.) growing in the field...
Acid rain is a growing problem with the continued industrialization of the better part of the world,...
151 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987.Simulated acid rain has been ...
The purpose of this research was to test the effect that acid rain had on the growth of plants. With...
Two-year-old spruce (Picea rubens Sarg.) seedlings were exposed to acid mists containing equimolar a...
The pollens of apple flowers have been treated with simulated acid rain solutions in range of pHs 2....
Red spruce (Picea rubens Sarg.) growth and reproduction is declining in many areas of the eastern Un...
Acid deposition, a side effect of human advances in industrial and agricultural technology, is now k...
Two stands of red spruce (Picea rubens Sarg.) trees growing in close proximity to each other on Whit...
Two-year-old red spruce seedlings [Picea rubens Sarg. syn. P. rubra (Du Roi) Link] were subjected to...
Acidified precipitation may affect the productivity of forests by altering the availability of plant...
Widespread forest decline has been documented in Europe and NE-U.S.A. (Johnson,1987; Woodman, 1987)....
Artificial acid rain (pH 2,3,4, and 5) was treated on the seeds of six woody species to examine its...
Successful fruit set depends on several reproductive processes including pollen germination and lube...
Successful fruit set depends on several reproductive processes including pollen germination and lube...
Mature trees of a single clone of Sitka spruce (Picea sitchensis (Bong.) Carr.) growing in the field...
Acid rain is a growing problem with the continued industrialization of the better part of the world,...
151 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987.Simulated acid rain has been ...
The purpose of this research was to test the effect that acid rain had on the growth of plants. With...
Two-year-old spruce (Picea rubens Sarg.) seedlings were exposed to acid mists containing equimolar a...
The pollens of apple flowers have been treated with simulated acid rain solutions in range of pHs 2....