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210 results found
Aluminum (Al) distribution among several cellular fractions was investigated in root tips of seedlings of one Al-resistant and one Al-sensitive family of slash pine (Pinus elliottii Engelm.) and loblolly pine (Pinus taeda L.) grown in nutrient solution containing 100 μM AlCl3 (pH 4) for 167 h.…
Author(s): Jaroslaw Nowak, Alexander L. Friend
Keywords: aluminum tolerance, aluminum toxicity, cellular Al, genetic variation, Pinus elliottii, Pinus taeda
Source: Tree Physiology
Year: 2005
Differences in root system structure attributable to stand origin were examined by pairing seeded and planted stands of loblolly (Pinus taeda L.) and shortleaf pine (P. echinata Mill.). The 17 paired stands were 3 to 9 years old and located in Arkansas, Oklahoma, and Texas on similar soil and site…
Author(s): Constance A. Harrington, John C. Brissette, William C. Carlson
Keywords: Pinus echinata, Pinus taeda, root system morphology
Source: Forest Science. 35(2): 469-480.
Year: 1989
Increasing atmospheric carbon dioxide concentration, [CO2], has profound effects on growth and development of trees. Adoubling of [C02] generally stimulates photosynthesis (Murray 1995; Saxe, Ellsworth & Heath 1998) and can lead to a substantial increase in tree growth (Poorter 1993). For…
Author(s): M. Hussain, M. E. Kubiske, K. F. Connor
Keywords: Pinus taeda, Seed germination, Carbon dioxide, Seedling growth, Growth effects, Growth chambers, Greenhouse gases, North Carolina
Source: Functional ecology. Vol. 15 (2001).:p. 344-350 : ill.
Year: 2001
Stand structure affects two key variables that affect biomass allocation to the stem: leaf area and height to the center of the crown. By translating wind forces into bending moment, these variables generate bending stress within a stem. The uniform stress axiom of stem formation can be used to…
Author(s): Thomas J. Dean
Keywords: Pinus taeda, uniform stress axiom, carbon allocation, fertilization
Source: Forest Science 47(2001):69-76
Year: 2001
We analyzed the hydraulic constraints imposed on water uptake from soils of different porosities in loblolly pine (Pinus taeda L.) by comparing genetically related and even-aged plantations growing in loam versus sand soil. Water use was evaluated relative to the maximum transpiration rate (Ecrit)…
Author(s): G. Hacke, J.S. Sperry, B.E. Ewers, D.S. Ellsworth, K.V.R. Schäfer, R. Oren
Keywords: Pinus taeda, xylem cavitation, soil water transport, root-shoot relations, stomatal regulation
Source: Oecologa (2000) 124:495-505
Year: 2000
Using loblolly pine, shortleaf pine, white oak, and northern red oak as examples, this paper considers the behavior of potential relative increment (PRI) models of optimal tree diameter growth under data uncertainity. Recommendations on intial sample size and the PRI iteractive curve fitting…
Author(s): Don C. Bragg
Keywords: Potential relative increment, ecological model, Pinus taeda, Pinus echinata, Quercus alba, Quercus rubra, Eastwide Forest Inventory Data Base (EFIDB)
Source: Environmental Modelling and Software 20 (2005) 1225-1238
Year: 2005
At Murder Creek Research Natural Area, Georgia, USA, we compared structural characteristics of late-successional pine-hardwood stands two to three years after infestation by southern pine beetle (Dendroctonus frontalis Zimmerman) to those of adjacent noninfested stands. Death of up to eight Pinus…
Author(s): Timothy B. Harrington, Mingguang Xu, M. Boyd Edwards
Keywords: Canopy gay dynamics, Dendroctonus frontalis, Pinus echinata, Pinus taeda, tree species diversity
Source: Natural Areas Journal 20:360-365
Year: 2000
Mixed pine (Pinus spp.)-hardwood forests are common in the southern United States (U.S.), but little quantitative information exists on the response of understory forage to reductions in basal area from thinning. We determined understory forage characteristics before thinning and 2 and 4 years…
Author(s): David G. Peitz, Michael G. Shelton, Philip A. Tappe
Keywords: Arkansas, basal area, biomass, browse, competition, coverage, forage, hardwoods, Pinus taeda, thinning
Source: Wildlife Society Bulletin 29(2):697-705
Year: 2001
While the effect of soil temperature and rnoisture on soil C02 efflux (Ec) has becn widely investigated, the relationship between Ec and soil carbon (C). root, and stand parameters has not been comprehensively examined or quantified across extensive spatial and temporal scales. Wle measured Ec in…
Author(s): Christopher M. Gough, John R. Seiler
Keywords: Soil CO2 efflux, soil respiration, loblolly pine, Pinus taeda, stand age, soil temperature, carbon, roots, coarse woody debris
Source: Forest Ecology and Management 191(2004) 353-363
Year: 2004
In response to concerns about aluminum and HCl exposure associated with rocket motor testing and launches, survival and growth of full-sib families of loblolly pine (Pinus taeda L.) and slash pine (Pinus elliottii Engelm.) were evaluated in a nursery bed experiment. Each species was exposed to a…
Author(s): Jaroslaw Nowak, Alexander L. Friend
Keywords: Acute acidity exposure, aluminum resistance, aluminum tolerance, aluminum toxicity, genetic variation, mycorrhizae, Pinus elliottii, Pinus taeda, Pisolithus tinctorius, soil acidity, solid rocket motor testing
Source: Tree Physiology
Year: 2006