• Chemical Growth Retardant Effects on Easter Lilies

      Bailey, D. A.; Miller, W. B.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Plants of Lilium longiflontm Thunb. 'Nellie White' recei,yed the following treatments during forcing: 1) control; 2-3) gne or two sprays of 50 mg-liter ancymidol 4-9) one or two sprays of 5, la, or 15 mg-liter XE-1019; or 10) one spray of 20 mg-liter XE-1019. All growth retardant treatments reduced plant height compared to controls. Plant height decreased linearly with increasing concentration of XE-1019 for both one- and two-spray treatments. High concentrations of XE-1019 delayed anthesis; ancymidol treatments did not. Individual corolla length was not affected by treatments. Treatments did not affect daughter bulb depletion or new daughter bulb growth. Total leaf area and leaf dry weight decreased as XE-1019 concentration increased; ancymidol treatments did not affect leaf area, but did reduce leaf dry weight. Leaf total soluble carbohydrate decreased with increasing concentration of XE-1019.
    • Controlling Hybrid Lily Plant Height with Ancymicol and XE-1019

      Bailey, D. A.; Miller, W. B.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Plants of Lilium speciosum hybrids '101' and '298' received one 125 ml soil drench containing 1-3) 0, 0.125, or 0.25 mg ai. ancymidol per pot; or 4-6) 0.05, 0.10, or 0.15 mg a.i. XE-1019 per pot. Ancymidol treatments were less effective in controlling plant height (11 % and 16 % reduction of control plant height) than were XE-1019 treatments (18 %, 26 %, and 34 % reduction of control plant height). Treatments did not affect days from planting to visible bud; days from planting to anthesis of the first flower per inflorescence; the total number of flowers per inflorescence reaching anthesis; or the number of aborting buds per inflorescence. The treatments investigated allowed for rapid production of plants having a commercially acceptable height without a reduction in flowering quality.
    • Determining Optimum Length of Bulb Cold Storage for Oriental Hybrid Lilies in Arizona

      Miller, W. B.; Bailey, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Bulbs of three varieties of oriental hybrid lilies were stored at 4 °C for 6 to 12 weeks prior to greenhouse forcing at 18 °C night temperature. Increasing duration of storage reduced the number of days to shoot emergence, visible flower buck and anthesis for each variety. The number of days from planting to anthesis ranged from 70 to 102 and varied with cultivar and storage duration. Increasing durations of storage had no commercially significant effect on the number of flowers reaching anthesis, number of leaves or aborted flower buds. The varieties used in this study flower earlier than commercially established cultivars and may be successfully forced in Arizona for early spring holidays.
    • Identification of the Phloem Translocated Carbohydrate in Idria columnaris (Boojum tree)

      Miller, W. B.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Sucrose was identified by high performance liquid chromatography (HPLC) as the only phloem-mobile carbohydrate in the Boojum tree. This result has implications for carbohydrate metabolism in the desert adapted Boojum and ocotillo, as discussed below.
    • Localization of Reserve Remobilization During Scalet Formation on Lilium longiflorum Scales

      Miller, W. B.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      When Lilium longiflorum bulb scales we removed and placed in a moist environment, new bulbs ("scalets") arise from the base of the original scale, providing a practical means of clonal propagation. To determine which region of the scale is responsible for the early development of the new scalet, investigations were conducted on the localization of stanch hydrolysis and accumulation of soluble sugars in basal distal and central regions. Over a six week period starch concentration decreases initially in the distal regions, followed by the central region. Soluble sugars increased in distal areas over this same time period These findings indicate the distal regions of a lily scale are important in the early development of the new scalet, in contrast to the adjacen4 basal region.
    • Propogation and Nursery Production Studies With New Arid Land Species

      Miller, W. B.; Bailey, D. A.; Palzkill, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Several species of low -water requiring species have been successfully propagated through vegetative and sexual means. Auxin treatments and bottom healing were beneficial in many cases. Development of improved propagation schemes, and subsequent growing practices, will increase grower success and profitability, eventually increasing availability of new low water use plants to the Arizona consumer. The long-term result of this work will be the availability of new, low-water use plant species which may be utilized by the homeowner and landscape contractor. The addition of new and exciting plant materials to the consumer market, it is hoped will accelerate the use of arid species in the Arizona landscape, resulting in water savings throughout the state, particularly in urban areas.
    • Propogation of Baja Fairy Duster (Calliandra Californica) by Stem Tip Cuttings

      Bailey, D. A.; Miller, W. B.; Palzkill, D. A.; Kopec, David M. (College of Agriculture, University of Arizona (Tucson, AZ), 1988)
      Stem tip cuttings of Calliandra californica were treated, prior to rooting with 0, 4,000, 4000, 12,000 or 16,000 ppm IBA in a talc formulation. Rooting was enhanced by application of 12,000 and 16,000 ppm IBA. Root system fresh weight increased with increasing concentration of IBA. No treatment effected percent survival of cuttings.