Journal article Open Access
Wael M. Semida; P. Hadley; W. Sobeih; N. A. El-Sawah; M. A. S. Barakat
Photoselective plastic films with thermic properties
are now available so that greenhouses clad with such plastics exhibit
a higher degree of “Greenhouse Effect” with a consequent increase in
night time temperature. In this study, we investigate the potential
benefits of a range of thermic plastic films used as greenhouse cover
materials on the vegetative and reproductive growth and development
of Iceberg lettuce (Lactuca sativa L). Transplants were grown under
thermic films and destructively harvested 4, 5, and 6 weeks after
transplanting. Thermic films can increase night temperatures up to 2
⁰C reducing the wide fluctuation in greenhouse temperature during
winter compared to the standard commercial film and consequently
increased the yield (leaf number, fresh weight, and dry weight) of
lettuce plants. Lettuce plants grown under Clear film respond to cold
stress by the accumulation of secondary products (phenolics, and
D. T. Krizek, H. D. Clark, and R. M. Mirecki, Spectral properties of selected uv-blocking and uv-transmitting covering materials with application for production of high-value crops in high tunnels. Photochemistry and Photobiology, 81, (2005) 1047-1051.
D. W. Robinson, Developments in plastic structures and materials for horticultural crops. Extension Bulletin - ASPAC Food and Fertilizer Technology Center, 331, (1991) 1-12.
E. Espi, A. Salmeron, A. Fontecha, Y. Garcia-Alonso, and A. I. Real, New ultrathermic films for greenhouse covers. Journal of Plastic Film & Sheeting, 22, (2006)59-68.
E. Tsormpatsidis, R. G. C. Henbest, F. J. Davis, N. H. Battey, P. Hadley, and A. Wagstaffe, Uv irradiance as a major influence on growth, development and secondary products of commercial importance in lollo rosso lettuce 'revolution' grownunder polyethylene films. Environmental and Experimental Botany, 63, (2008) 232-239.
E. Tsormpatsidis, R. G. C. Henbest, N. H. Battey, and P. Hadley, The influence of ultraviolet radiation on growth, photosynthesis and phenolic levels of green and red lettuce: Potential for exploiting effects of ultraviolet radiation in a production system. Annals of Applied Biology, 156, (2010)357-366.
F. M. Del Amor, J. Lopez, and A. Gonzalez, Effect of photoselective sheet and grafting technique on growth, yield, and mineral composition of sweet pepper plants. Journal of Plant Nutrition, 31, (2008)1108-1120.
G. Szeicz, J. L. Monteith, and J. M. Dos Santos, A tube solarimeter to measure radiation among plants. Jorunal of Applied Ecology, 1, (1964)169-174.  K. Maxwell and G. N. Johnson, Chlorophyll fluorescence-a practical guide. Journal of Experimental Botany, 51, (2000) 659-668.  A. J. Clark, W. Landolt, J. B. Bucher, and R. J. Strasser, Beech (Fagus sylvatica) response to ozone exposure assessed with a chlorophyll a fluorescence performance index. Environmental Pollution, 109, (2000)501-507.  I. Voipio and J. Autio, Responses of red-leaved lettuce to light intensity, uv-a radiation and root zone temperature. Acta Horticulturae, 399, (1995)183-187.  V. L. Singleton, R. Orthofer, R. M. Lamuela-Raventos, and P. Lester, "Analysis of total phenols and other oxidation substrates and antioxidants by means of folin-ciocalteu reagent Methods in enzymology, (Academic Press)," (1999) pp. 152-178.  S. Y. Wang and H. S. Lin, Antioxidant activity in fruits and leaves of blackberry, raspberry, and strawberry varies with cultivar and developmental stage. Journal of Agricultural and Food Chemistry, 48, (2000) 140-146.  K. J. Meyers, C. B. Watkins, M. P. Pritts, and R. H. Liu, Antioxidant and antiproliferative activities of strawberries. Journal of Agricultural and Food Chemistry, 51, (2003) 6887-6892.  G. Connellan, Greenhouse covering properties and selection. In Proceeding for the national protected cropping exportation (1998).  G. Papadakis, D. Briassoulis, G. Scarascia Mugnozza, G. Vox, P. Feuilloley, and J. A. Stoffers, Review paper (se--structures and environment): Radiometric and thermal properties of, and testing methods for, greenhouse covering materials. Journal of Agricultural Engineering Research, 77, (2000) 7-38.  D. C. E. Wurr and J. R. Fellow, The Growth of 3 Crisp Lettuce Varieties from Different Sowing Dates. J. Agri. Sci., 102: (1984)733-745.  R. J. Dufault, B. Ward, and R. L. Hassell, Dynamic relationships between field temperatures and romaine lettuce yield and head quality. Scientia Horticulturae, 120: (2009)452-459.  N. Gruda, Impact of environmental factors on product quality of greenhouse vegetables for fresh consumption. Critical Reviews in Plant Sciences, 24: (2005) 227-247.  D. C. E. Wurr, J. R. Fellow, and A. J. Hambridge, Environmental- Factors Influencing Head Density and Diameter of Crisp Lettuce cv. Saladin. J. Hort. Sci., 67: (1992)395-401.  L. F. M. Marcelis and L. R. B. Hofmaneijer, Effect of Temperature on the Growth of Individual Cucumber Fruits. Physiologia Plantarum, 87: (1993) 321-328.  H. C. Kohl and Y. Mor, Producing Pot Chrysanthemums at Low Night Temperature. J. Amer. Soc. Hort. Sci. 106: (1981) 89-91.  R. H. Merritt, and H. C. Kohl, Crop Productivity Efficiency of Petunias in the Greenhouse. J. Amer. Soc. Hort. Sci., 108: (1983) 544-548.  A. Edreva, V. Velikova, T. Tsonev, S. Dagnon, A. Gürel, L. Aktaş, and E. Gesheva, Stress-Protective Role of Secondary Metabolites: Diversity of Functions and Mechanisms. Gen. Appl. Plant Physiology, 34: (2008) 67-78.  J. Guo, W. Han, and M. Wang, Ultraviolet and environmental stresses involved in the induction and regulation of anthocyanin biosynthesis: A review. Afr. J. Biotech., 7: (2008) 4966-4972.</p>
I. V. Pollet and J. G. Pieters, Par transmittances of dry and condensate covered glass and plastic greenhouse cladding. Agricultural and Forest Meteorology, 110, (2002) 285-298.
Y. Ashkenazi, Improving the properties of polyethylene films for agricultural uses. Acta Horticulturae, 434, (1996) 205-212.