Flowering Foliage Plants: Anthurium × ‘Red Hot’
1. Pn of Individual Leaves in Shaded Greenhouse and Interior Conditions. Tissue
cultured liners of Anthurium × ‘Red Hot’ (Henny, 1999) were potted in 15-cm diameter
containers filled with Vergo Mix A and grown in a shaded greenhouse with a light level
of 300 µmol/m2
/s. Each container was topdressed with 5 g of an eight-month formulation
Osmocote 17-7-12 and watered twice a week. The main shoot leaves were numbered as
one to five with one as the youngest expanded leaf. After measuring the Pn of each leaf,
five plants were maintained in the shaded greenhouse and the other five were placed in
interior rooms under a light intensity of 16 µmol/m2
/s. The Pn of each leaf of plants in
both locations were measured daily for 17 days.
2. Responses to Interior Low Light Conditions. Tissue cultured Anthurium × ‘Red Hot’
liners were potted in 15-cm diameter containers filled with Vergo Mix A and cultured in a
shaded greenhouse as described above. Plants flowered eight months after transplanting.
Number of new leaves, senesced leaves, flower count, senesced flowers, flower longevity,
and ratio of canopy widths to heights were determined monthly. Three months later, the
plants were paced in interior evaluation rooms with a light intensity of 16 µmol/m2
/s.
Plant canopy width to height ratios, numbers of new leaves, senesced leaves and flowers,
and new flowers were recorded monthly after placement indoors. Flowers with any
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discoloration on either spadix or spathe were considered senesced flowers.