| Baldcypress, Montezuma cypress, and T302 (a baldcypress X Montezuma cypress cross) were evaluated for salt tolerance at four levels of salt rates (0, 1, 3.5, and 6 ppt for 13 weeks and then 0, 2, 7, and 12 ppt for another 12 weeks). The salinity treatments did not have a significant effect on growth rate. There were significant differences of growth rate among the genotypes. T302 produced higher wet weights than the others. However, Montezuma cypress exhibited the greatest increase in height. Na concentration in Taxodium leaves increased as sea salt concentrations increased. Of three genotypes, baldcypress exhibited the highest leaf content of Na, Ca, S, and Fe; Montezuma cypress had the lowest leaf content of Na, Ca, S, and Fe; and the cross T302 was in between.;Seventeen Taxodium genotypes were evaluated for growth performance. The results indicated T302 had the greatest growth rate of all genotypes.;Cutting propagation of T302 was investigated with different treatments - (1) wounding, (2) rates of rooting hormone, and (3) RegalCrown ®. Results indicated rooting ability improved with increasing root hormone rates and wounding. RegalCrown® treatments had no significant effect on rooting capacity of the cuttings. |
