The effect of cyclic moisture stress on gas exchange processes of juvenile loblolly pine seedlings from East Texas (mesic) and 'Lost Pines' (xeric) seed sources at different stages of growth and development.

摘要

Two Experiments were carried out to determine the effect of cyclic moisture stress on the gas exchange processes, growth and development of the "Lost pines" (xeric) and East Texas (mesic) seed sources. Loblolly pine seeds from both East Texas and Lost Pines seed sources were stratified, and planted in preassembled pots according to a predetermined schedule and method. The experimental plants were grown for two months under favorable environmental conditions in a growth chamber. The seedlings were then randomly assigned to one of eight moisture regimes (;The results of this study indicated higher rates of CO