Next Article in Journal
Use and Effects of Different Brassica and Other Rotation Crops on Soilborne Diseases and Yield of Potato
Next Article in Special Issue
Serianthes nelsonii Seed Germination and Seedling Behavior are Minimally Influenced by Chemical and Light Treatment
Previous Article in Journal
Growth Responses and Root Characteristics of Lettuce Grown in Aeroponics, Hydroponics, and Substrate Culture
Open AccessFeature PaperArticle

The Effect of Light Intensity and Temperature on Flowering and Morphology of Potted Red Firespike

1
Coastal Research and Extension Center, Mississippi State University, Poplarville, MS 39470, USA
2
Department of Plant and Soil Sciences, Mississippi State University, Starkville, MS 39759, USA
3
Department of Sustainable Bioproducts, Mississippi State University, Starkville, MS 39759, USA
*
Author to whom correspondence should be addressed.
Horticulturae 2018, 4(4), 36; https://doi.org/10.3390/horticulturae4040036
Received: 26 September 2018 / Revised: 16 October 2018 / Accepted: 20 October 2018 / Published: 25 October 2018
(This article belongs to the Special Issue Light Management for Ornamental Plants)
Red firespike (Odontonema strictum) is a tropical flowering plant that was selected as a potential flowering potted plant for its attractive red floral spikes. The objective of this study was to evaluate how light intensity, photoperiod, and temperature affect the growth and flowering of firespike. In Experiment 1, plants were grown under 0%, 45%, or 65% shade and two photoperiod conditions; long-day (LD = ≥14 h) and short-day (SD = 9 h), for 16 weeks. Plants grown under 45% shade + LD were tallest at 35.9 cm, while plants grown under 65% shade + SD were shortest at 22.8 cm. During the finishing stage, the number of inflorescences increased when plants were grown under 45% shade + SD, 45% shade + LD, and no shade, with 6, 7, and 9 inflorescences, respectively. In addition, the first open flower was observed in the 0% shade group (control) 92 days after starting the experiment. The time to first open flower increased when the plants were grown under 65% shade, either under SD or LD. In Experiment 2, plants were grown in controlled environment growth chambers with average daily temperatures of 15, 25, or 35 °C and an irradiance of 200 µmol·m−2·s−1 for 9 h per day. Plants grown at 25 °C were the tallest and had the largest leaf area. Plants grown at 15 and 35 °C had 28% and 22% less leaf area, respectively. The average number of inflorescences in plants grown at 25 °C was 1.6, while no inflorescence development was observed in plants grown at 15 or 35 °C by the termination of the experiment. There were no differences between plant growth index or branch number in response to temperature. Under the experimental conditions tested, the most rapid and uniform flowering of firespike occurred when plants were grown under no shade or at 25 °C. View Full-Text
Keywords: Odontonema strictum; short-day; photoperiod; irradiance; shade Odontonema strictum; short-day; photoperiod; irradiance; shade
MDPI and ACS Style

Rezazadeh, A.; Harkess, R.L.; Telmadarrehei, T. The Effect of Light Intensity and Temperature on Flowering and Morphology of Potted Red Firespike. Horticulturae 2018, 4, 36.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop