Loblolly pine (Pinus taedu L.) seedling height, root collar diameter (RCD) and the specific activities of three sucrose metabolizing enzymes, namely, sucrose spthase (SS), acid invertase, and neutral invertase, were measured to assess seedling responses to transplant stress. Bare-root nursery-grown loblolly pine seedlings were lifted and transplanted immediately into nearby nursery beds in Febr...

The effect of a short period of elevated temperature, or heat shock, on protein synthesis was investigated in 2-day-old seedlings of jack pine (Pinus banksiana Lamb.), loblolly pine (P. taeda L.), lodgepole pine (P. contorta Dougl.), black spruce (Picea mariana (Mill.) BSP), and white spruce (P. glauca (Moench) Voss.). In all species, heat shock led to increased [(35)S]methionine incorporation ...

mately 7 to 10% of the area available for loblolly pine production (Schultz, 1997), optimum nutrition may beCommercial timber production is increasingly reliant on long-term come strategically important to meet global demand for fertilization to maximize stand productivity, yet we do not understand loblolly derived forest products (Albaugh et al., 1998). the extent to which this practice homoge...

We installed a field experiment to support the development of protocols to restore longleaf pine (Pinus palustris Mill.) to existing mature loblolly pine (P. taeda L.) stands at Camp Lejeune, NC. Seven canopy treatments included four uniform and three gap treatments. The four uniform treatments were defined by target residual basal area (BA) [control (uncut), BA9, BA4.5, and BA0 (clearcut) m2/h...

A 1.21-ha plot was established in a mature pine–hardwood forest (Hyatt’s Woods) along a low stream terrace in southeastern Arkansas. Compositionally, this stand had considerable arboreal richness, with 26 different tree species ‡9 cm in diameter. Loblolly pine (Pinus taeda) contributed 42% of the stand’s 37.1 m/ha of basal area; the remaining fraction included baldcypress (Taxodium distichum) a...

To determine the effects of shade on biomass, carbon allocation patterns and photosynthetic response, seedlings of loblolly pine (Pinus taeda L.), white pine (Pinus strobus L.), red maple (Acer rubrum L.), and yellow-poplar (Liriodendron tulipifera L.) were grown without shade or in shade treatments providing a 79 or 89% reduction of full sunlight for two growing seasons. The shade treatments r...

The Nantucket pine tip moth, Rhyaciona frustrana (Comstock), a common regeneration pest of loblolly pine, Pinus taeda L., has been shown to reduce tree volume yields through larval feeding. Chemical applications can be effective in protecting trees from the growth losses associated with this feeding, and optimum spray timing values are commonly used to reduce the number of necessary application...

From 1962 through 1998,20prescribed burns were applied in a natural stand of longleafpine (Pinus palustris Mill.) to determine the ejfects of variousfire regimes on theforestplant community. The original longleaf seedlings regeneratedfrom the 1955 seed crop and were growing in a grass-dominated cover when the study began. By 1999, prescribed burning in March and May resulted in a significantly ...

Novel lignin is formed in a mutant loblolly pine (Pinus taeda L.) severely depleted in cinnamyl alcohol dehydrogenase (E.C. 1.1.1.195), which converts coniferaldehyde to coniferyl alcohol, the primary lignin precursor in pines. Dihydroconiferyl alcohol, a monomer not normally associated with the lignin biosynthetic pathway, is the major component of the mutant's lignin, accounting for approxima...