scholarly journals Influences of Season and Cutting Week within a Propagation Cycle on Rooting of ‘Stained Glass’ Coleus Shoot Tip Cuttings Are Not Overcome by Rooting Compound Treatment

2016 ◽  
Vol 26 (5) ◽  
pp. 620-627 ◽  
Author(s):  
Brigitte D. Crawford ◽  
John M. Dole ◽  
Ben A. Bergmann
Keyword(s):  
Root Systems ◽  
Adventitious Rooting ◽  
Plant Age ◽  
Growth Chamber ◽  
Stock Plant ◽  
Stained Glass ◽  
Cycle Number ◽  
Solenostemon Scutellarioides ◽  
Plant Environment ◽  
Quality Ratings

Influence of season of the year, cutting week within a propagation cycle (number of weeks from which a stock plant has been harvested), stock plant age, and rooting compound on postpropagation cutting quality, and adventitious rooting was examined for ‘Stained Glass’ coleus (Solenostemon scutellarioides). Cuttings were of higher quality and produced more robust root systems when a propagation cycle started in summer vs. fall or spring even when cuttings were harvested from stock plants of the same age. Cutting week within a propagation cycle significantly influenced postpropagation cutting quality and rooting when cuttings were harvested over many weeks from the same stock plants and when cuttings were harvested for three propagation events using stock plants of different ages. When cuttings were harvested on the same days from stock plants of three distinct ages, cuttings harvested in the first week were larger with greater root weights but had more yellowed leaves and lower quality ratings compared with the two subsequent cutting weeks, but stock plant age had no effect on any observed parameter. Treatment with rooting compound did not overcome the significant influences of season and cutting week within a propagation cycle whether rooting was carried out in a greenhouse or growth chamber. Shoot and root fresh and dry weights were positively correlated with both daylength and midday instantaneous light of the stock plant environment.

scholarly journals Stock Plant Nutrition Influences the Adventitious Rooting of ‘Rotundifolia’ Holly Stem Cuttings

1991 ◽  
Vol 9 (2) ◽  
pp. 83-85
Author(s):  
William H. Rein ◽  
Robert D. Wright ◽  
Dale D. Wolf
Keyword(s):  
Adventitious Rooting ◽  
Stem Cuttings ◽  
Stock Plant ◽  
Fertilizer Rate ◽  
Percent Moisture ◽  
Growth Activity ◽  
Phosphorus And Potassium ◽  
Highly Correlated ◽  
Fertilizer Rates ◽  
Treatment Design

Abstract Containerized stock plants of Ilex crenata Thunb. ‘Rotundifolia’ were liquid-fertilized at least three times per week with nitrogen (N) at five rates (25, 50, 100,200, and 300 mg N/l) and in two forms (100% NH4NO3 or 50% NH4NO3 + 50% urea) in a factorial treatment design. Phosphorus and potassium were included in a constant ratio with N (100 N:15 P:50 K). Leaf and stem percent N levels were suboptimal at the lowest fertilizer rate and excessive at the highest fertilizer rate. Percent rooting of stem cuttings decreased linearly with fertilizer rate. With increasing fertilizer rates, total nonstructural carbohydrate (TNC) levels increased in leaves and remained constant in stems. Stem cutting percent moisture increased and was highly correlated with fertilizer rate. The form of N applied made no statistical difference in these trends. The decrease in percent rooting with increasing fertilizer rates was attributed to increases in shoot growth activity and decreased tissue maturation.

scholarly journals 105 Propagation of Taxodium mucronatum (Montezuma Cypress)

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 459D-459
Author(s):  
Rolston St. Hilaire
Keyword(s):  
New Mexico ◽  
Central America ◽  
Seedling Development ◽  
National Forest ◽  
Root Number ◽  
Stock Plant ◽  
Plant Environment ◽  
Sexual Propagation ◽  
Cold Hardy ◽  
Half Sibling

Indigenous stands of Taxodium mucronatum Ten. are found in North and Central America, but relatively little is known about the propagation of the species. Progeny from one tree in the Mesilla Valley near Las Cruces, N.M., and from two trees in the Gila National Forest, New Mexico, were observed to be relatively cold-hardy. I initiated this research to find the best conditions for asexual and sexual propagation of those three trees. Terminal softwood cuttings were collected on 16 Oct. 1998 from a half-sibling of the Mesilla Valley tree, and from two half-siblings from the trees in the Gila National Forest. Cuttings were treated with two concentrations of IBA and rooted under intermittent mist in the greenhouse for 13 weeks. Cuttings taken from the Mesilla Valley source and from one of the half-siblings from the Gila did not root. The other half-sibling plant from the Gila showed 82% rooting when cuttings were treated with 8 g IBA/kg. Fifty percent of cuttings rooted when they were treated with 3 g IBA/kg. Root number and root length were greatest for cuttings treated with 8 g IBA/kg. Replication over time will determine whether stock plant environment and the time of taking cuttings affect rooting. Strategies that optimize seed germination and seedling development of asexually and sexually propagated material are being evaluated.

scholarly journals Propagation Medium Moisture Level Influences Adventitious Rooting of Woody Stem Cuttings

1991 ◽  
Vol 116 (4) ◽  
pp. 632-636 ◽  
Author(s):  
William H. Rein ◽  
Robert D. Wright ◽  
John R. Seiler
Keyword(s):  
Water Uptake ◽  
Dry Weight ◽  
Adventitious Rooting ◽  
Moisture Level ◽  
Stem Cuttings ◽  
Stock Plant ◽  
Xylem Water Potential ◽  
Basal Rot ◽  
Species Incidence ◽  
Propagation Medium

Stem cuttings of Blue Rug juniper (Juniperus horizontalis Moench `Wiltonii'), `Hino-Crimson' azalea [Rhododendron (Lindl.) P1anch `Hino-Crimson'], and `Helleri' holly (Ilex crenata Thunb. `Helleri') were propagated in 1 peat: 1 perlite (v/v) at one of five moisture levels based on medium dry weight (125%, 250%, 375%, 500%, or 625%). Cutting survival and percentage of rooted cuttings were highest at the highest medium moisture level in all three species. Incidence of cutting basal rot was not directly related to medium moisture level, but more to the growth stage of the stock plant. Midday xylem water potential (ψ) of cuttings for each species was highest in the wettest propagation medium and lowest in the driest medium. During propagation, stem cutting ψ below - 2.0 MPa occurred even in the wettest medium tested, and frequently reached - 4.0 MPa in cuttings in the driest treatment (125%). Basal water uptake by cuttings was highest in the wettest medium moisture level. Water uptake was highest during the first few days after insertion, and thereafter decreased until root emergence.

Tumor Incidence and Shoot Morphology Differences in Rooted Cuttings from Rhododendron With and Without “Tissue Proliferation”

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 478d-478
Author(s):  
Mark H. Brand ◽  
Richard Kiyomoto
Keyword(s):  
Tissue Culture ◽  
Leaf Size ◽  
Plant Age ◽  
Tumor Incidence ◽  
Stock Plant ◽  
Rooted Cuttings ◽  
Shoot Morphology ◽  
Size And Shape ◽  
Tissue Proliferation ◽  
Leaf Size And Shape

Tissue proliferation (TP) occurs in Rhododendron and is characterized by basal tumors that often develop numerous dwarf shoots. Growers need to know if the TP condition will persist in plants grown from normal-appearing cuttings collected from plants with TP tumors. Cuttings of seven cultivars were collected from plants with TP [TP(+)] and without TP [TP(-)] and rooted. Plants were grown in containers outdoors for a minimum of 2 years. For all cultivars, plants grown from TP(+) cuttings had more leaves per growth flush than plants grown from TP(-) cuttings. Shoots of TP(+) plants were either similar in length to shoots of TP(-) plants, or were shorter, as was the case for `Boule de Neige', `Catawbiense Album', and `Montego'. `Montego' and `Scintillation' TP(+) leaves were shorter, narrower, had smaller leaf areas and larger length to width rations than leaves from TP(-) shoots. No difference in leaf size and shape were detected for other cultivars. TP tumors were not observed on any plants. Another study examined the effect of stock plant age from tissue culture on development of TP symptoms in rooted cuttings. `Montego' plants grown from cuttings collected from microplants, 3-year-old TP(+) plants, 6-year-old TP(+) plants and TP(-) plants were compared. Plants grown from 6-year-old TP(+) and TP(-) cuttings did not develop tumors. 83% of plants from microplant cuttings and 74% of plants from 3-year-old TP(+) cuttings formed tumors. Plants from microplant cuttings were more likely to develop large tumors that surround half or more of the stem than plants from 3-year-old TP(+) cuttings.

scholarly journals Antitranspirant Treatments of Stock Plants do not alter Growth and Adventitious Rooting of Shoots of ‘Montaigne’ Lilac and White Fringetree

2002 ◽  
Vol 20 (4) ◽  
pp. 240-244
Author(s):  
Susan M. Switras-Meyer ◽  
Jeffrey H. Gillman
Keyword(s):  
Root Length ◽  
Adventitious Rooting ◽  
Shoot Length ◽  
Root Number ◽  
Stock Plant ◽  
Significant Treatment ◽  
Acrylic Emulsion ◽  
Film Forming ◽  
Rooting Of Cuttings ◽  
Plant Treatment

Abstract Antitranspirants were evaluated for their effectiveness as a stock plant treatment to improve adventitious rooting of softwood cuttings of Syringa vulgaris L. ‘Montaigne’ (Montaigne lilac) and Chionanthus virginicus L. (white fringe tree). New shoots of S. vulgaris ‘Montaigne’ and C. virginicus were sprayed with one of two film-forming antitranspirants including Clear Spray® (aqueous acrylic emulsion) and sodium silicate; or Atrazine®, a herbicide that acts as a stomate-regulating antitranspirant. Shoot caliper of antitranspirant-treated lilacs increased more slowly than controls. Thirty days after treatment cuttings were taken from both taxa. All treatments resulted in 80 to 85% rooting of cuttings in lilac after 6 weeks, but cuttings from Clear Spray®-treated plants rooted more quickly. Chionanthus virginicus cuttings treated with Clear Spray® had significantly lower rooting (16%) than cuttings taken from Atrazine® treated plants (50%). In a subsequent experiment, antitranspirant treatment had no significant effect on shoot length or caliper of ‘Montaigne’ lilac. Photosynthetic rate, transpiration rate, and location of cutting on the stock plant were all positively correlated with shoot length, shoot caliper, and cutting diameter. Shoot length and caliper and cutting diameter, however, were all negatively correlated with root number and root length. There were no significant treatment effects on rooting percentage, root number or root length.

Genetic variation for adventitious rooting in response to low phosphorus availability: potential utility for phosphorusacquisition from stratified soils

2003 ◽  
Vol 30 (9) ◽  
pp. 973 ◽  
Author(s):  
Carter R. Miller ◽  
Ivan Ochoa ◽  
Kai L. Nielsen ◽  
Douglas Beck ◽  
Jonathan P. Lynch
Keyword(s):  
Lateral Root ◽  
Adventitious Roots ◽  
Root Systems ◽  
Adventitious Rooting ◽  
Phosphorus Availability ◽  
Root Density ◽  
Phosphorus Stress ◽  
Low Phosphorus ◽  
Basal Roots ◽  
Root Types

We hypothesized that adventitious roots may improve crop adaptation to low-phosphorus soils by enhancing topsoil foraging. In a tropical field study, phosphorus stress stimulated adventitious rooting in two phosphorus-efficient genotypes of common bean (Phaseolus vulgaris L.) but not in two phosphorus-inefficient genotypes. Although phosphorus availability had no consistent effects on the length or biomass of whole root systems, it had differential effects on adventitious, basal, and taproots within root systems in a genotype-dependent manner, resulting in increased allocation to adventitious roots in efficient genotypes. Adventitious roots had greater length per unit biomass than other root types, especially under phosphorus stress. Adventitious roots had less construction cost than basal roots, despite having similar tissue nitrogen content. Phosphorus stress reduced lateral root density, and adventitious roots had less lateral root density than basal roots. Lateral roots formed further from the root tip in adventitious roots compared with basal roots, especially under phosphorus stress. Field results were confirmed in controlled environments in solid and liquid media. Stimulation of adventitious rooting by phosphorus stress tended to be greater in wild genotypes than in cultivated genotypes. We propose that adventitious rooting is a useful adaptation to low phosphorus availability, because adventitious roots explore topsoil horizons more efficiently than other root types.

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