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irradiated iceberg lettuce increased by 33% higher than the control. The mechanism responsible for the increased irradiation-induced respiration not well understood. Gunes et al. (2001) postulated that irradiation-stimulated catabolism of acetate may have

levels of phenolic compounds ( Caldwell, 2003 ). Phenolic composition and content of lettuce significantly vary among types, including loose leaf, oak leaf, iceberg, butterhead, and romaine, with iceberg lettuce tending to be the lowest ( Caldwell, 2003

Plant Physiol. 132 1272 1282 O'Brien, R.D. van Bruggen, A.H.C. 1990 Soil fumigation with dazomet and methyl bromide for control of corky root of iceberg lettuce Plant Dis. 74 1022 1025 Patterson

method to control the insects. Four romaine and three iceberg lettuce varieties were evaluated for responses to the insects using natural infestations in the field experiments. Lu et al. (p. 773) observed significant differences in responses to insect

recommended ( Waycott and Ryder, 1992 ). Modern Imperial-type iceberg lettuce cultivars were developed for the cool-climate production areas of California and Arizona ( Ryder, 1999 ) and are more susceptible to bolting and development of puffy heads than the

Biochemical changes and sensory quality of shredded and MA-packaged iceberg lettuce J. Food Sci. 60 1265 1276 Kim, J.G. Luo, Y. Tao, Y. Saftner, R.A. Gross, K.C. 2005 Effect of initial oxygen

in crisphead (iceberg) lettuce. However, the yield of red and green leaf lettuce in hot conditions is controlled by this genotype × environment (G × E) interaction and must be considered during the breeding process ( Lafta et al., 2017

. Sci. 133 228 233 Hayes, R.J. Maruthachalam, K. Vallad, G.E. Klosterman, S.J. Simko, I. Luo, Y. Subbarao, K.V. 2011a Iceberg lettuce breeding lines with resistance to verticillium wilt caused by race 1 isolates of Verticillium dahliae HortScience 46

’ lime ( Citrus latifolia Yu. Tanaka) ( Jomori et al., 2003 ); reduced disorders in carrot ( Daucus carota L.) ( Fan and Mattheis, 2000a ) and ‘Iceberg’ lettuce ( Lactuca sativa L.) ( Fan and Mattheis, 2000a ); and delayed lignin deposition and

romaine lettuce cultivar Okeechobee as evaluated by feeding incidents per plant and serpentine leafminer on susceptible iceberg lettuce cultivar Raleigh recorded as mines per plant. Cultivars were planted on 22 Oct. 2010 at Belle Glade, FL. Vertical bars