Propagation of Loblolly, Slash, and Longleaf Pine from Needle Fascicles
A method of vegetatively propagating pine from needle fascicles, previously reported in China, was tested for its potential use in propagating loblolly (Pinus taeda L.), slash (P. elliottii var. elliottii Engelm.), and longleaf (P. palustris Mill.) pine. The method consists of a 16- to 20-hour auxin treatment, a 30- to 60-day rooting stage, and a 60- to 120-day shooting stage. All stages are completed under greenhouse conditions, the first two in water solutions and the third in potting soil. The results of two experiments are reported here. In experiment 1, four auxins were tested with loblolly and slash pine on two collection dates. Overall, slash pine rooted better than loblolly, but loblolly shooted better. Indole-3-acetic (IAA) and indole-3-butyric (IBA) acids were effective at promoting roots and shoots with both species, while a-naphthaleneacetic (NAA) and indole-3-propionic (IPA) acids were effective at promoting roots with slash pine only. Several treatment combinations produced regeneration rates above 25%. In experiment 2, needle fascicles from loblolly, slash, and longleaf pine stock plants of varying ages (1 to 10 years) were cultured. Rooting declined sharply between ages 1, 2, and 3 for loblolly and slash, with slash rooting better than loblolly and longleaf. Slash and longleaf rooted fascicles produced more shoots than loblolly, although relatively few shoots were formed in this experiment. It appears that this vegetative propagation method has potential for the rapid increase of selected loblolly, slash, and longleaf pine seedlings, and it may have special significance for longleaf pine, since the "grass stage" of this species severely limits the production of standard stem cuttings. Tree Planter's Notes 43(3):67-71: 1992.
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Author(s): C. Dana Nelson, Zeng Linghai, James M. Hamaker
Publication: Tree Planters' Notes - Volumes 43, Number 3 (1992)
Section: Peer-Reviewed Articles
Volume: 43
Number: 3
