Changes in Nucleic Acid Fractions of Seed Components of Red Pine (Pinus resinosa Ait.) during Germination.

Winter water relations of New England conifers and factors influencing their upper elevational limits. I. Measurements.

The upper elevational limits of tree species are thought to be controlled by abiotic factors such as temperature and the soil and atmospheric conditions affecting plant water status. We measured relative water contents (RWC), water potentials (Psi) and cuticular conductances (g(c)) of shoots of four conifer species-eastern hemlock (Tsuga canadensis (L.) Carr.), eastern white pine (Pinus strobus...

Cadmium Uptake by Pinus resinosa Ait. Pollen and the Effect on Cation Release and Membrane Permeability.

Cadmium uptake by red pine (Pinus resinosa Ait.) pollen from a graded series of Cd(2+) solutions (0 to 2.88 microequivalents per 50 milligrams pollen) and its effect on membrane integrity were examined by atomic absorption spectroscopy. Uptake was strongly dependent on Cd(2+) concentration and was limited to adsorption and cation exchange in pollen walls during a 3-hour measurement period. Good...

Seasonal differences in freezing stress resistance of needles of Pinus nigra and Pinus resinosa: evaluation of the electrolyte leakage method.

Seasonal changes in freezing stress resistance of needles of red pine (Pinus resinosa Ait.) and Austrian pine (Pinus nigra Arnold) trees were measured by an electrolyte leakage method and by visual observation. During most of the year, freezing stress resistance determined by the two methods gave similar results. The electrolyte leakage method provided a good estimate of seasonal changes in fre...

Chloroplast microsatellites reveal population genetic diversity in red pine , Pinus resinosa Ait

Microsatellite analysis reveals genetically distinct populations of red pine (Pinus resinosa, Pinaceae).

Red pine (Pinus resinosa Ait.) is an ecologically and economically important forest tree species of northeastern North America and is considered one of the most genetically depauperate conifer species in the region. We have isolated and characterized 13 nuclear microsatellite loci by screening a partial genomic library with di-, tri-, and tetranucleotide repeat oligonucleotide probes. In an ana...