The Role of UV Radiation Added to LED Lighting System in Growth Control of African Violet (Saintpaulia ionantha Wendl.)
الموضوعات : مجله گیاهان زینتیBehnaz Akbarian 1 , Mansour Matloobi 2 , Alireza Motallebi-Azar 3 , Mohamad Reza Dadpour 4
1 - Department of Horticulture Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
2 - Department of Horticulture Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
3 - Department of Horticulture Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
4 - Department of Horticulture Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
الکلمات المفتاحية: Ornamental plant, Light quality, Flowering, Photomorphogenesis, Ultra-violet Radiation,
ملخص المقالة :
Light Emitting Diodes (LEDs) can be used as a tool to control the quality of plants in order to meet the requirements of the market by accurately schedule uniform flowering based on a predetermined market date. The aim of this study was to investigate the effect of different light qualities of red (R), blue (B), and UV-A (UV) provided by LEDs, and white light produced by fluorescent lamps (FL) on growth, morphology and flowering characteristics of African violet (Saintpaulia ionantha Wendl.). An experiment was conducted in controlled environment growth chambers at 25 °C. Three ratios of R:B (1:0, 3:1, 0:1) and FL (14 h/d) were used as all-day treatments and UV LED (2 h/d) was supplemented for three ratios of R:B (1:0, 3:1, 0:1) and FL (14 h/d) as end of day (EOD) treatment. Statistical analysis showed addition of B to light spectrum inhibited abnormal leaf growth and promoted compactness. Flowering under FL treatment was distinctly inferior as measured by the number of floral buds, full blooms and inflorescences. However, addition of EOD UV plus R3B1 contributed to higher production of floral buds and full blooms in a short period of time. Supplementing UV light to LED treatments resulted in accelerated leaf expansion. Generally, supplemental UV plus R or B was an acceptable energy-efficient alternative for improving quality of African violet. Vegetative and reproductive phase of Saintpaulia were a function of light quality which could assist the predictability of flowering time in controlled environment systems.
Bourget, C.M. 2008. An introduction to light-emitting diodes. HortScience, 43:1944-1946.
Casal, J. J. 2013. Photoreceptor signaling networks in plant responses to shade. Annual Review of Plant Biology, 64(1): 403–427.
Chen, Y., Li, T., Yang, Q., Zhang, Y., Zou, J., Bian, Z. and Wen, X. 2019. UVA radiation is beneficial for yield and quality of indoor cultivated lettuce. Frontiers in Plant Science, 10(December): 1–10.
Faust, J.E. and Heins, R.D. 1993. Modeling leaf development of the African violet (Saintpaulia ionantha Wendl.). Journal of the American Society for Horticultural Science, 118(6): 747–751.
Faust, J.E. and Heins, R.D. 1994. Modeling inflorescence development of the African violet (Saintpaulia ionantha Wendl.). Journal of the American Society for Horticultural Science, 119(4): 727–734.
He, R., Zhang, Y., Song, S., Su, W., Hao, Y. and Liu, H. 2021. UV-A and FR irradiation improves growth and nutritional properties of lettuce grown in an artificial light plant factory. Food Chemistry, 345:128727.
Heo, J., Lee, C., Chakrabarty, D. and Paek, K. 2002. Growth responses of marigold and salvia bedding plants as affected by monochromic or mixture radiation provided by a Light-Emitting Diode (LED). Plant Growth Regulation, 38(3): 225–230.
Hooks, T., Masabni, J., Sun, L. and Niu, G. 2021. Effect of pre-harvest supplemental uv-a/blue and red/blue led lighting on lettuce growth and nutritional quality. Horticulturae, 7(4): 1–14.
Huché-Thélier, L., Crespel, L., Gourrierec, J. Le., Morel, P., Sakr, S. and Leduc, N. 2016. Light signaling and plant responses to blue and UV radiations-perspectives for applications in horticulture. Environmental and Experimental Botany, 121: 22–38.
Izzo, L.G., Mickens, M.A., Aronne, G. and Gómez, C. 2021. Spectral effects of blue and red light on growth, anatomy, and physiology of lettuce. Physiologia Plantarum, 172(4): 2191–2202.
Kang, S., Zhang, Y., Zhang, Y., Zou, J., Yang, Q. and Li, T. 2018. Ultraviolet-a radiation stimulates growth of indoor cultivated tomato (Solanum lycopersicum) seedlings. HortScience, 53(10): 1429–1433.
Keller, M.M., Jaillais, Y., Pedmale, U.V., Moreno, J.E., Chory, J. and Ballaré, C.L. 2011. Cryptochrome 1 and phytochrome B control shade-avoidance responses in Arabidopsis via partially independent hormonal cascades. Plant Journal, 67(2): 195–207.
Khoshimkhujaev, B., Kwon, J.K., Park, K.S., Choi, H.G. and Lee, S.Y. 2014. Effect of monochromatic UV-A LED irradiation on the growth of tomato seedlings. Horticulture Environment and Biotechnology, 55(4): 287–292.
Kim, H.M. and Hwang, S.J. 2019. The growth and development of ‘Mini Chal’ tomato plug seedlings grown under various wavelengths using light emitting diodes. Agronomy, 9(3): 1-19. doi:10.3390/agronomy9030157
Kim, J.K. and Sang, C.G. 1982. A study on the growth and flowering of Saintpaulia ionantha under controlled light intensities. Journal of Korean Society for Horticultural Science, 23: 323-331.
Kong, Y., Schiestel, K. and Zheng, Y. 2019. Pure blue light effects on growth and morphology are slightly changed by adding low-level UVA or far-red light: A comparison with red light in four microgreen species. Environmental and Experimental Botany, 157: 58–68.
Kreslavski, V.D., Los, D.A., Schmitt, F.J., Zharmukhamedov, S.K., Kuznetsov, V.V. and Allakhverdiev, S.I. 2018. The impact of the phytochromes on photosynthetic processes. Biochimica et Biophysica Acta - Bioenergetics, 1859(5): 400–408.
Kwack, B. and Kim, I. 1969. Growth and ornamental value of Saintpaulia and Hypoestes under the different light conditions. Journal of Korean Society for Horticultural Science, 6: 75-79.
Loconsole, D. and Santamaria, P. 2021. UV lighting in horticulture: A sustainable tool for improving production quality and food safety. Horticulturae, 7(1): 1–13.
McCree, K.J. 1971. The action spectrum, absorptance and quantum yield of photosynthesis in crop plants. Agricultural Meteorology, 9(C): 191–216.
Mockler, T.C., Guo, H., Yang, H., Duong, H. and Lin, C. 1999. Antagonistic actions of Arabidopsis cryptochromes and phytochrome B in the regulation of floral induction. Development, 126(10): 2073–2082.
O’Carrigan, A., Babla, M., Wang, F., Liu, X., Mak, M., Thomas, R., Bellotti, B. and Chen, Z.H. 2014. Analysis of gas exchange, stomatal behaviour and micronutrients uncovers dynamic response and adaptation of tomato plants to monochromatic light treatments. Plant Physiology and Biochemistry, 82: 105–115.
Reed, J.W., Nagpal, P., Poole, D.S., Furuya, M. and Chory, J. 1993. Mutations in the gene for the red/far-red light receptor phytochrome B alter cell elongation and physiological responses throughout Arabidopsis development. Plant Cell, 5(2): 147–157.
Takenaka, A. 1994. Effects of leaf blade narrowness and petiole length on the light capture efficiency of a shoot. Ecological Research, 9(2): 109–114.
Tesema, M., Asbjorn, K., Ragnar, H. and Elisabeth, J. 2013. A high proportion of blue light increases the photosynthesis capacity and leaf formation rate of Rosa × hybrida but does not affect time to flower opening. Physiologia Plantarum, 148 (1):146–159.
Verdaguer, D., Jansen, M.A.K., Llorens, L., Morales, L.O. and Neugart, S. 2017. UV-A radiation effects on higher plants: Exploring the known unknown. Plant Science, 255: 72–81.
Zhang, Y., Kaiser, E., Zhang, Y., Zou, J., Bian, Z., Yang, Q. and Li, T. 2020. UVA radiation promotes tomato growth through morphological adaptation leading to increased light interception. Environmental and Experimental Botany, 176: p.104073.
Zheng, L. and van Labeke, M.C. 2017. Long-term effects of red- and blue-light emitting diodes on leaf anatomy and photosynthetic efficiency of three ornamental pot plants. Frontiers in Plant Science, 8(May): 1–12.
