Genetically improved, container loblolly pine (Pinus taeda L.) seedlings were compared to natural ly es tabl ished loblol ly seedl ings on a cutoverpine s i te . Crop pines on 6 of 12plots were releasedfrom woody and herbaceous competition within a 2 ft radius of each stem. On release plots, woody competition was controlled by hand-cutting for 5 consecutive yr and herbaceous competition was con...

"Department of Aquatic Ecology and Environmental Biology, University of Nijmegen, 6525 ED Nijmegen, The Netherlands #Department of Forest Science, Oregon State University, Corvallis, OR 97331, USA $Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR 97331, USA %Plant and Microbial Biology, 111 Koshland Hall, University of California, Berkeley, CA ...

J. Entomol. SC!. 38(4): 621-630 (October 2003) Abstract The widespread application of intensive forest management practices throughout the southeastern U.S. has increased loblolly pine, f inus faeda L., yields and shortened conventional rotation lengths. Fluctuations in Nantucket pine tip moth, Rhyacionia frustrana (Comstock), population density and subsequent damage levels have been linked to ...

Background:  Cisplatin has cytotoxic effects through free radical generation. Reports indicate that various members of Pinaceae family may have antioxidant properties. In this study we investigated the cytoprotective effects of needle volatile oil and bark extract of Pinus eldarica in hepatoma G2 (HepG2) cell line.  Methods: Using the maceration technique, we obtained the ethanolic extract of ...

Aggregated female cones were found in 192 Pinus halepensis trees growing in 54 populations in Israel, in habitats of vastly differing ecological conditions. All of these trees also carried normal (1-5 in a whorl) female cones. The number of aggregates per tree varied from one to several dozen. Some of the trees formed aggregates every year, after the first year of aggregate formation, while oth...

Longleaf pine (Pinus palustris) woodlands and savannas are among the most frequently burned ecosystems in the world with fire return intervals of 1-10 years. This fire regime has maintained high levels of biodiversity in terms of both species richness and endemism. Land use changes have reduced the area of this ecosystem by >95%, and inadequate fire frequencies threaten many of the remnants tod...

Production of container longleaf pine (Pinus palustris Mill.) seedlings for reforestation and restoration exceeds that of bare-root production, but information on container production techniques has been slow to develop. Because outplanting success requires quality seedlings, interim guidelines were proposed in 2002 to assist nursery managers and tree planters in developing and using the best s...

We examined the effects of structural and physiological acclimation on the photosynthetic efficiency of Scots pine (Pinus sylvestris L.) shoots. We estimated daily light interception (DLI) and photosynthesis (DPHOT) of a number of sample shoots situated at different positions in the canopy. Photosynthetic efficiency (epsilon) was defined as the ratio of DPHOT to the potential daily light interc...

The effect of repeated prescribed burning on long term growth of Pinus ponderosa in northern Arizona wasexamined. Fire treatments for hazard reduction were initiatedin 1976,and growth was evaluated in 1988 for fire rotations of 1, 2, 4, 6, 8, and 10 years. Dendroecological analysis shows that there were only small changes in treegrowth (compared tocontrols) in the first few years after the init...