The influence of ozone on Pinusstrobus L. pollen germination

1983 ◽  
Vol 13 (1) ◽  
pp. 184-187 ◽  
Author(s):  
L. F. Benoit ◽  
J. M. Skelly ◽  
L. D. Moore ◽  
L. S. Dochinger
Keyword(s):  
Air Pollution ◽  
Pollen Germination ◽  
Symptom Expression ◽  
Pollen Production ◽  
Blue Ridge ◽  
White Pine ◽  
Eastern White Pine ◽  
Foliar Symptom ◽  
Percent Germination ◽  
Blue Ridge Parkway

Along the Blue Ridge Parkway in Virginia, branchlets and pollen were collected from native eastern white pine (Pinusstrobus L.) trees that were sensitive, intermediate, and tolerant to oxidant air pollution based on foliar symptom expression. Fumigation of branchlets with 0.10 ppm ozone (O3) for 4 or 8 h/day until anthesis did not affect pollen production or germinability. However, the percent germination was significantly (P ≤ 0.01) reduced in pollen exposed under wet conditions to 0.15 O3 for 4 h. The importance of this finding in the reproduction of pines is discussed.

Foliar injury air pollution surveys of eastern white pine (Pinus strobus L.): A review

1994 ◽  
Vol 30 (3) ◽  
pp. 247-274 ◽  
Author(s):  
James P. Bennett ◽  
Robert L. Anderson ◽  
Manfred L. Mielke ◽  
James J. Ebersole
Keyword(s):  
Air Pollution ◽  
Pinus Strobus ◽  
Foliar Injury ◽  
White Pine ◽  
Eastern White Pine

Radial growth reductions of Pinusstrobus L. correlated with foliar ozone sensitivity as an indicator of ozone-induced losses in eastern forests

1982 ◽  
Vol 12 (3) ◽  
pp. 673-678 ◽  
Author(s):  
L. F. Benoit ◽  
J. M. Skelly ◽  
L. D. Moore ◽  
L. S. Dochinger
Keyword(s):  
Radial Growth ◽  
Radial Increment ◽  
Blue Ridge ◽  
White Pine ◽  
Shenandoah National Park ◽  
Blue Ridge Mountains ◽  
Ozone Sensitivity ◽  
Blue Ridge Parkway ◽  
Increment Growth

A study of the radial increment growth of native eastern white pine (Pinusstrobus L.) evaluated the possible effects of oxidant air pollution (primarily ozone) in long-term growth of forest species in the Blue Ridge Mountains of Virginia. Ten plots of three white pines of reproducing age (one each classified as tolerant, intermediate, and sensitive to ozone on a foliar basis) were sampled. Plots were dispersed over 446 km from the northern end of the Skyline Drive in Shenandoah National Park to the southern most part of the Blue Ridge Parkway in Virginia. Mean annual radial increment growth of the ozone sensitive trees was significantly smaller (P = 0.01) than that of tolerant trees for the period 1955–1978. Mean increment growth of all trees, regardless of their sensitivity to ozone, decreased during the period. Precipitation was positively correlated with radial growth in all sensitivity classes prior to 1964, but negatively correlated after 1964.

The Differential Sensitivity of Eastern White Pine to Three Types of Air Pollution

1973 ◽  
Vol 3 (4) ◽  
pp. 543-547 ◽  
Author(s):  
Charles R. Berry
Keyword(s):  
Air Pollution ◽  
Power Plant ◽  
Sulfur Dioxide ◽  
Field Conditions ◽  
Differential Sensitivity ◽  
Vehicular Traffic ◽  
White Pine ◽  
Eastern White Pine ◽  
Fertilizer Plant ◽  
Resistant Lines

The possibility of selecting clones of eastern white pine (Pinusstrobus L.) with specific sensitivities to different air pollution regimes was investigated. Field screening was carried out by exposing potted seedlings to field conditions for 1 year or longer in each of three areas where a particular phytotoxicant was known to predominate. The areas were characterized by the following pollution sources and major phytotoxicants: (1) power plant, sulfur dioxide; (2) fertilizer plant, fluorides; and (3) vehicular traffic, oxidants. Selections were made of: (1) trees injured during only one season in one area; (2) trees injured during both the summer and winter, but only in one area; (3) trees resistant to air pollution in all three areas; and (4) trees sensitive to air pollution in all three areas. These selections are being propagated for use as specifically sensitive bioindicators of air pollution and as resistant lines for use in seed orchards of white pine.

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