We used differential display to identify chitosan responsive cDNAs in slash pine cell cultures. Two clones that showed increased mRNA abundance had sequence similarity to genes with roles in major plant defense responses, clone 18 to cinnamic acid 4-hydroxylase, and clone 30 to chitinase.

Protocylindrocorpus dendrophilus n. sp. is described from xylem samples taken from beetle infested slash pine (Pinus elliottii Engelmann var. elliottii) in Central Louisiana. It is similar to P. goodeyi (Rühm) Paramonov, but differs by the possession of a protuberant and more posteriorly located vulva and in the position of the caudal papillae. Morphometrics of the male and female are presented.

Wood quality attributes were examined in six stands of slash pine (Pinus elliottii Engelm. var. elliottii) and loblolly pine (P. taeda L.) in the lower Coastal Plain of Georgia and Florida. Several plots comprised each stand, and each plot was divided so that it received three fertilizer treatments: a control treatment with herbaceous weed control at planting and brush control at mid-rotation o...

A field study on the infertile and droughty Lakeland sands of west Florida indicated that bedding or fertilization (134 kg P /ha as ordinary superphosphate and 90 kg N/ha as ammonium nitrate) or both increased early growth of planted slash pine (Pinus elliottii Engelm.). Throughout the 6-year study, best growth was obtained when the treatments were combined, resulting in 6-year-old trees averag...

Intensive vegetation management alters seedling growth and development in southcm pine plantations. Adequate light, moisture. and nutrients stimulate seedling stem growth and crown development. Thus rapid stem growth could deplete nutrient and energy resources required for aggressive rcot growth. Early root system expansion within the available rooting zone is critical because structural root g...

The piñon (Pinus edulis Engelm.)-juniper [Juniperus monosperma (Engelm.) Sarg.] woodlands of Bandelier National Monument are experiencing accelerated erosion. Earlier studies suggest that causes of these rapidly eroding woodlands are related to an unprecedented rapid transition of ponderosa pine (Pinus ponderosa C. Lawson) savanna to piñon-juniper woodlands as a result of cumulative historical ...