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  • Author or Editor: R. J. Henny x
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This paper reports a method of propagating Peperomia ‘Red Ripple’ from leaf discs in vitro.

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Pollen of Spathiphyllum floribundum (Linden & Andre) N. E. Br. ‘Mauna Loa’ and Vriesea malzinei E. Morr. was stored at 7° and 23°C at relative humidities of 10, 35, 65 and 90%. Optimum pollen germination of both species occurred after storage at 7°C and 65% relative humidity. Germination decreased rapidly at 23°C regardless of relative humidity.

Open Access
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Four Dieffenbachia species produced a low percentage of pollen grains with mean diameters 3244% larger than normal-sized grains.

Open Access
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Pollen of Dieffenbachia maculata (Lodd.) G. Don ‘Perfection’ remained viable for 5 days when stored at 5°C and 90% relative humidity. Pollen germination declined rapidly when stored for more than 1 day at 5 or 25° without controlled humidity. Freezing of pollen was an unsuccessful storage method.

Open Access
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Germination of Maranta leuconeura E. Morr. embryos was 65% in Linsmaier and Skoog culture medium and increased to 100% with the addition of N6-[Δ2-isopentenyl] - adenine (2iP).

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Dieffenbachia maculata (Lodd.) G. Don ‘Perfection’ sprayed with GA3 in September flowered within 105 days or less. Inflorescence number per plant was greater at 500 and 1000 mg/liter than at the 250 mg/liter treatment.

Open Access
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Homalomena lindenii (Rodigas) Ridley treated with a single foliar spray of gibberellic acid (GA3) at 100, 200, or 400 mg·liter–1 flowered within an average of 137 days after treatment whereas untreated plants did not flower. In a second experiment, plants treated with GA3 at 25, 50, 75, or 100 mg·liter–1 did not. Blooms displayed no structural abnormalities.

Open Access
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Autotetraploid (4n) plants of Dieffenbachia maculata (Lodd.) G. Don ‘Perfection’ flowered poorly, compared to diploids (2n), following treatment with 250 or 500 mg foliar spray of gibberellic acid (GA3)/liter. GA3-treated 4n plants produced bracts that normally precede flowering but remained vegetative and produced additional distal shoots instead of flowers.

Open Access
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Abstract

Previous reports have shown that Aglaonema can be induced to bloom with gibberellic-acid treatment (2), and seed set can be increased by maintaining flowers at 100% RH for 24 hr following pollination (1). Both techniques have greatly aided the production of Aglaonema hybrids. Occasionally, however, desirable crosses cannot be made due to unavailability of sufficient pollen or receptive pistillate flowers. In such cases, it would be helpful if pistillate flowers could be pollinated 1 or 2 days after anthesis, because Aglaonema pollen cannot be stored more than 1 day.

Open Access