Article Figures & Data
Figures
- Figure 1.
Photo of a propagule at the midpoint of the study (4 wk after striking). Cuttings were initially 3 nodes in length and frequently resumed growth via axillary bud break or re-initiating growth from apical meristem while in the propagation environment.
- Figure 2.
Photo of cutting block taken 3 wk after cuttings were struck.
- Figure 3.
Photo of cutting block taken 8 wk after cuttings were struck, at the time destructive harvesting occurred.
- Figure 4.
Effect of cutting maturity on rooting success with K-IBA. With 25 successful cuttings possible per repetition, comparisons among hormone concentrations and maturity are displayed. Lighter bars (left) indicate all juvenile cuttings at differing K-IBA (potassium salt of indole-3-butyric acid) concentrations. Dark bars (right) indicate mature cuttings at differing K-IBA concentrations. Cutting age is defined as propagules harvested from 2-y-old stock plants 6 wk after breaking dormancy (M: mature) and cuttings harvested from seedlings 14 wk after germination (J: juvenile). Bars represent means with standard error based on standard one-way ANOVA. Treatment groups (columns) not sharing a letter are significantly different at P = 0.05 level based on adjusted P values using Tukey’s HSD.
- Figure 5.
Effect of cutting maturity on rooting success with NAA. With 25 successful cuttings possible per repetition, comparisons among hormone concentrations and maturity are displayed. Lighter bars (left) indicate all juvenile cuttings at differing NAA (laboratory grade, 1-naphthaleneacetic acid) concentrations. Dark bars (right) indicate mature cuttings at differing NAA concentrations. Cutting age is defined as propagules harvested from 2-y-old stock plants 6 wk after breaking dormancy (M: mature) and cuttings harvested from seedlings 14 wk after germination (J: juvenile). Bars represent means with standard error based on standard one-way ANOVA. Treatment groups (columns) not sharing a letter are significantly different at P = 0.05 level based on adjusted P values using Tukey’s HSD.
Tables
- TABLE 1
Effect of hormone type (K-IBA or NAA) and concentration on the mean number of roots, root length, and plant height at harvest (8 wk after striking).
Treatment Mature cuttings Mean number of roots Mean root length Mean plant height Control 9.19±1.32 ab 9.43±0.82 a 3.71±0.37 c K-IBA-1000 ppm 7.5±1.35 ab 8.5±0.89 a 6.2±0.41 ab K-IBA-3000 ppm 11.94±1.35 a 8.34±0.91 a 7.94±0.42 a K-IBA-5000 ppm 11.1±1.35 ab 7.79±0.86 a 3.46±0.39 c K-IBA-8000 ppm 9.52±1.35 ab 8.15±0.86 a 4.4±0.39 bc K-IBA-50 ppm — — — NAA-500 ppm 5.75±1.35 b 8.18±0.84 a 4.74±0.38 bc NAA-1000 ppm 8.52±1.35 ab 5.75±0.91 a .28±0.42 c NAA-1500 ppm 9.87±1.35 ab 6.5±0.94 a 4.11±0.43 c NAA-2000 ppm 10.35±1.35 ab 8.11±0.84 a 4.23±0.38 c Significancea 0.0212 0.05 < 0.001 Notes: Results depicted apply only to propagules collected from mature (2-y-old) stock plants collected and struck 6 wk after breaking dormancy yet prior to floral initiation. All values are reported in cm: 1 cm = 0.4 in. Standard error of the means are reported in addition to means. K-IBA = indole-3-butyric acid; NAA = 1-naphthaleneacetic acid.
↵a Significance of treatment effects (P > F; ns = not significant at the 0.05 level). Means in same treatment group (columns) not sharing a letter are significantly different at P < 0.05 level based on adjusted P values using Tukey HSD and a standard one-way ANOVA.
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