Far-red light filtering by plastic film, greenhouse-cladding materials: effects on growth and flowering inPetuniaandImpatiens

Effects of light quality on the accumulation of phytochemicals in vegetables produced in controlled environments: a review

“…Similar positive effects of blue and green light on plant growth, such as photosynthetic capacity and phytochemical production, have been reported by Baroli et al and Hogewoning et al Furthermore, researchers are increasingly interested in the qualities of photosynthetically ineffective light, such as far‐red light and UV light, because such types of light may affect plant growth and phytochemical accumulation and metabolism . Therefore, light condition regulation can be used to optimise phytochemical accumulation in plants, and it provides a method for producing high‐quality horticultural products without chemical growth regulators …”

“…57 -59 Therefore, light condition regulation can be used to optimise phytochemical accumulation in plants, and it provides a method for producing high-quality horticultural products without chemical growth regulators. 60,61 Important recent reviews have detailed the effects of light quality on vegetable growth and development. These reviews have provided great help to related research.…”

Petunia × hybrida during transition to flowering as affected by light intensity and quality treatments

“…The time of flowering of Petunia 9 hybrida is a complex function of temperature, light integral and photoperiod; flowering can be hastened by high temperatures, high light intensity and long days (Adams et al 1999). Recently, results were obtained about the effect of red and far-red light deficiency on Petunia 9 hybrida growth and flowering (Kubota et al 2000;Fletcher et al 2005;Ilias and Rajapakse 2005a, b). Additionally, several studies have approached genetical and biochemical features of Petunia 9 hybrida transition to flowering (Souer et al 1998;Snowden and Napoli 2003;Ben-Nissan et al 2004).…”

Light-Quality Manipulation by Horticulture Industry

“…LIGHT AND PLANT DEVELOPMENT Photoselective plastic greenhouse films with far-red light absorbing dye pigments have been developed by greenhouse film manufacturers in Japan (Mitsui Chemicals Inc.) and the United Kingdom (BPI Agri) and tested on a wide range of crops, especially focusing on height control of bedding plants (vanHaeringen et al, 1998;Rajapakse et al, 1999;Runkle and Heins, 2003;Fletcher et al, 2005). Photoselective films, in general, reduced the transmission of both red (600-700 nm) and far-red (700-800 nm) light, but the reduction of far-red light is greater, therefore resulting in a higher R:FR of transmitted light (Figure 12.1).…”

“…Amongst the crops tested, watermelon and cucumber seedlings had the greatest response followed by bell peppers, tomatoes and chrysanthemums. Far-red light absorbing films, depending on the growing season, delayed anthesis by 7-13 days in snapdragon and petunia, both long-day plants (Kubota et al, 2000;Cerny et al, 2003;Runkle and Heins, 2003;Fletcher et al, 2005). Flowering of ornamental crops grown under far-red light absorbing photoselective films has been shown to vary, depending on the crop and the growing season.…”