To grow the high-quality potted plants preferred by consumers, many growers use chemical "regulators" designed to affect plant growth and development.
The use of chemical growth retardants is standard practice in the production of compact gardenia plants; the chemicals are used to reduce plants' internode length, and encourage the production of lateral shoots that create aesthetically pleasing, spherical plants with plentiful flower buds.
Chemical sprays are effective at reducing gardenia plant height, but need to be applied regularly—a practice that increases the cost of production and contributes to environmental pollution.
Dr. Constantinos Kittas and his colleagues from the University of Thessaly School of Agricultural Sciences and the Agricultural University of Athens (Greece) published a study in HortScience in which they report on experiments with the use of a photoselective polyethylene greenhouse covering film±a less expensive and more environmentally friendly alternative to chemical treatment—for production of compact potted gardenia (Gardenia jasminoides Ellis) plants.
Two types of experiments were performed on gardenia cuttings rooted in rooting benches and on young potted plants grown under low tunnels. In both experiments, two types of cover materials were used: a photoselective polyethylene (P-PE), filtering light within the wavelength range 600 to 750 nm and a common polyethylene film (C-PE) routinely used in greenhouse practice. The experiments were carried out in a commercial plastic-covered greenhouse located on the coastal area of eastern Greece.
The researchers recorded photosynthetically active radiation, cover materials' spectral properties, air temperature, and relative humidity inside the rooting benches and under the low tunnels. Plant growth indicators (including main shoot length and leaf area and lateral shoot number, leaf area, and fresh and dry weight) were determined along the growth cycle.
According to Kittas, "The research revealed that photoselective plastic films with high values and high B:R ratios are able to reduce the height of gardenia plants. However, continued development of gardenia plants under a P-PE film results in unmarketable, low-quality plants without lateral shoots and a resulting low number of flowers."
Although the study determined that the use of photoselective plastic films for the production of potted compact gardenia plants can contribute to the reduction of chemical use, Kittas added that more information about the effect of light quality and quantity as well as the necessary period of treatment on gardenia cuttings and transplanted plants is needed before this technology is used in commercial greenhouses for compact potted gardenia plant production.
The complete study and abstract are available on the ASHS HortScience electronic journal web site: http://hortsci.ashspublications.org/cgi/content/abstract/43/7/2027
Founded in 1903, the American Society for Horticultural Science (ASHS) is the largest organization dedicated to advancing all facets of horticultural research, education, and application.
Michael W. Neff | EurekAlert!
Further reports about: > ASHS > Agricultural > Agricultural Sciences > Chemical sprays > Gardenia jasminoides Ellis > HortScience > Horticultural Science > Photoselective film > Plant Growth > Pollution > chemical growth retardants > gardenia plant height > greenhouse practice > high-quality potted plants > photoselective polyethylene > plants' internode length > plastic film > plastic-covered greenhouse > plentiful flower buds > potted gardenia plants
Faba fix for corn's nitrogen need
11.04.2018 | American Society of Agronomy
Wheat research discovery yields genetic secrets that could shape future crops
09.04.2018 | John Innes Centre
Physicists at the Laboratory for Attosecond Physics, which is jointly run by Ludwig-Maximilians-Universität and the Max Planck Institute of Quantum Optics, have developed a high-power laser system that generates ultrashort pulses of light covering a large share of the mid-infrared spectrum. The researchers envisage a wide range of applications for the technology – in the early diagnosis of cancer, for instance.
Molecules are the building blocks of life. Like all other organisms, we are made of them. They control our biorhythm, and they can also reflect our state of...
University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.
Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
23.04.2018 | Physics and Astronomy
23.04.2018 | Physics and Astronomy
23.04.2018 | Trade Fair News