Ficus benjamina L. and Dracaena marginata Lam. were grown in a modified Hoagland's nutrient solution containing either 0, 0.22 or 5.52 mg Fe3+/liter (HEEDTA or EDTA). F. benjamina grew well at all Fe levels and showed mild chlorosis only at 0 mg Fe/liter. For D. marginata, growth decreased and chlorosis increased as solution Fe level decreased. F. benjamina exhibited a high capacity for Fe3+ reduction, which increased as Fe level decreased, reaching a maximum below 0.06 mg·liter-1 D. marginata exhibited a low capacity for Fe3+ reduction, which was slightly enhanced at 0.1 to 0.15 mg·liter-1. In both species, reduction occurred in the presence of roots, with minimal reduction in their absence. This result indicates that Fe3+ is reduced at the root surface and not by reductants released into the solution. F. benjamina increasingly lowered pH as solution Fe decreased, and always lowered pH more than D. marginata at all Fe levels. Total and extractable Fe concentration of leaves did not correlate well with chlorosis, whereas total Fe content per plant correlated highly with chlorosis. Chemical names used: N-hydroxyethyl-ethylenediamine-triacetic acid (HEEDTA), ethylenediamine tetraacetic acid (EDTA).
Harvey J. Lang, Claire-Lise Rosenfield, and David Wm. Reed
Alicia Rihn, Hayk Khachatryan, Benjamin Campbell, Charles Hall, and Bridget Behe
A rating-based conjoint experiment combined with eye-tracking analysis was used to investigate the effect of plant attributes on consumer purchase likelihood for indoor foliage plants. The experiment assessed the effects of plant type (Dracaena marginata Lam., Guzmania lingulata, or Spathiphyllum wallisii Regel), volatile organic compound (VOC) removal capacity (high, low, or none specified), price ($10.98–14.98/plant), production method [certified organic, organic production (not certified), or conventional], and origin (in-state, domestic, or imported) on consumer preferences. An ordered logit model was used to analyze the data. Organic production methods, in-state origin, domestic origin, and high VOC removal increased participants’ purchase likelihood. Visually attending to the highest price point ($14.98) increased consumers’ purchase likelihood. Age, gender, child (<12 years), pet, relationship status, education, and ethnicity affected participants’ purchase likelihood for indoor foliage plants. Purchasing barriers for indoor foliage plants are also discussed. Results have implications for indoor foliage plant growers and retailers as they produce, promote, and sell their products.
Kalpana Sharma, Joyce L. Merritt, Aaron Palmateer, Erica Goss, Matthew Smith, Tim Schubert, Robert S. Johnson, and Ariena H.C. van Bruggen
. dracaenophilum were downloaded from GenBank for comparison across the entire region. Host range experiment. Three varieties of Dracaena marginata var. ‘Tarzan’, ‘Magenta’, and ‘Colorama’, and one variety of lucky bamboo obtained from Delray Plants Co., Venus
Andrew J. Macnish, Ria T. Leonard, and Terril A. Nell
’, Dracaena marginata ‘Bicolor’ and ‘Magenta’, Euphorbia splendens ‘Short and Sweet’, Spathiphyllum ‘Ty's Pride’). Ethylene treatment also accelerated senescence (i.e., browning) of the spadix and the surrounding spathe on Anthurium scherzerianum ‘Red
Kent D. Kobayashi, Andrew F. Kawabata, and Joanne S Lichty
Photoselective shadecloths that manipulate light quality may enable nursery growers to achieve desired plant growth. This ability to manage plant habit could give growers an additional nonchemical tool to improve potted plant quality. The objective of this study was to determine growth and flowering responses of potted Dracaena and Anthurium plants to four shadecloths. Dracaena deremensis `Janet Craig' and Dracaena marginata `Colorama' cane top-cuttings were placed in 70% black cinder: 30% peat moss media. Anthurium `Lola' liners were transplanted into 100% black cinder medium. Plants were grown in a greenhouse under 70% shadecloths: black, gray, red, and blue. Four months after planting, Dracaena `Janet Craig' had more new leaves under red shadecloth (10.4) compared to other shadecloths (8.9–9.3). Leaf area was less with red shadecloth (340 cm2) than other treatments (380-388 cm2). Plants under the red shadecloth had the lowest grower evaluation scores (5.4; 1 = poor, 10 = excellent) than those under other shadecloths (7.2–8.2), but all plants were considered marketable. Dracaena `Colorama' plants under red shadecloth had the greater plant height increase (20.1 cm) than those under other shadecloths (10.1–13.2 cm). Red shadecloth resulted in more new leaves (26.2) compared to other treatments (18.0–21.4). Anthurium `Lola' flower height 9 months after transplanting was less under red shadecloth (23.0 cm) than under black (33.0 cm). The number of flowers/pot was greater under red shadecloth (3.17) compared to those under other shadecloths (0.50–1.33). Flower size was greater (35.2 cm2) under red shadecloth than under black (20.0 cm2). Photoselective shadecloths may be used to nonchemically manipulate plant growth and improve the quality of potted Dracaena and Anthurium plants.
Kalpana Sharma, Erica Goss, and Ariena H.C. van Bruggen
complex. Host range experiment. One variety of Hawaiian Ti ‘Tipsy Pink’ obtained from Agri-Starts, Inc., Apopka, FL; three varieties of Dracaena marginata var. ‘Tarzan’, ‘Magenta’, and ‘Colorama’ and one variety of lucky bamboo ( D. sanderiana ) obtained
Svoboda V. Pennisi and Marc W. van Iersel
June 2010, to accommodate the number of species and cultivars used. Consecutive shipments of finished plant material ( Spathiphyllum ‘Sweet Chico’ Aglaonema spp., Sanseveria trifasciata ‘Hahnii’, Chamaedorea elegans , Dracaena marginata
Juanxu Liu, Min Deng, Richard J. Henny, Jianjun Chen, and Jiahua Xie
408 414 Chua, B.U. Kunisaki, J.T. Sagawa, Y. 1981 In vitro propagation of Dracaena marginata ‘Tricolor’ HortScience 16 494 Cui, J. Liu, J. Deng, M. Chen, J
Yaser Hassan Dewir, Abdulhakim A. Aldubai, Rashid Sultan Al-Obeed, Salah El-Hendawy, Mayada Kadri Seliem, and Khadija Rabeh Al-Harbi
Chua, B.U. Kunisaki, J.T. Sagawa, Y. 1981 In vitro propagation of Dracaena marginata ‘Tricolor’ HortScience 16 494 Compton, M.E. 1994 Statistical methods suitable for the analysis of plant tissue culture data Plant Cell Tissue Organ Cult. 37 217 242
Shu-Ting Fan, Der-Ming Yeh, and Tsu-Tsuen Wang
ethylene exhibited reduction in SPAD-502 value from 25 to 8 ( Fig. 1A ). Similar ethylene injury symptom expressed as leaf yellowing was reported for other potted foliage plants, including Dieffenbachia maculata G. Don ‘Marianne’, Dracaena marginata Lam