Vegetative propagation of Cupressus sempervirens L. of Cretan origin by softwood stem cuttings
1997
Stankova, T. | Panetsos, K.
One winter and 2 spring experiments were conducted testing the influence of genotype, auxin treatment, duration of the rooting period, time of cuttings collection and preliminary hedging on the rooting percentage and root quality of Cupressus sempervirens softwood stem cuttings. In total, 15 hedged and 7 nonhedged 4-year-old seedlings from 7 Cretan provenances of the species were used as cutting donors. The duration of the rooting period (3 months vs. 4 months) significantly affected the rooting and callus formation One month extension of the rooting period resulted in a 41.73% increase of rooted cuttings. The genotype was a major factor influencing the percentage of rooting, number of roots and length of the main root. Neither the treatment application, nor the time extension were able to offset the variation among the genotypes. The auxin treatment enhanced rooting and its positive effect was more pronounced during shorter rooting periods. However, the optimal IBA concentration for rooting differed among the genotypes and treatment x rooting duration interaction was present. The comparative results between the effect of the season and the preliminary rejuvenation showed that the cuttings obtained from slowly growing shoots (either from the lower part of nonhedged donors or those collected in winter) demonstrate higher capability to survive and to root than those from intensively growing shoots (from hedged donors, collected during the spring). Statistically significant genotype x season interaction was also found.
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