Arboriculture & Urban Forestry 36(5): September 2010 Lichtenthaler, H.K., and A.R. Wellburn. 1983. Determinations of total carotenoids and chlorophylls a and b of leaf extracts in different sol- vents. Biochemistry Society Transmycology 11:591–593. McKay, H. 1992. Electrolyte leakage from fine roots of conifer seed- lings: a rapid index of plant vitality following cold storage. Canadian Journal Forest Research 22:1371–1377. Manivannan. P., C.A. Jaleel, A. Kishorekumar, B. Sankar, R. Somasun- daram, R. Sridharan, and R. Panneerselvam. 2007. Propiconazole in- duced changes in antioxidant metabolism and drought stress amelio- ration in Vigna unguiculata (L.) Walp. Colloids surf. B: Biointerfaces 57:69–74. Marshall, J.G., R.G. Rutledge, E. Blumwald, and E.B. Dumbroff. 2000. Reduction in turgid water volume in jack pine, white spruce and black spruce in response to drought and paclobutrazol. Tree Physiology 20:701–707. Martin, U., S.G. Pallardy, and Z.A. Bahari. 1987. Dehydration tolerance of leaf tissues of six woody angiosperm species. Physiol Plantarum 69:182–186. Maxwell, K., and G.N. Johnson. 2001. Chlorophyll fluorescence – A practical guide. Journal Experimental Botany 51:659–668. Ort, D.R., and J.S. Boyer. 1985. Plant productivity, photosynthesis, and environmental stress. In Changes in Gene Expression in Response to Environmental Stress. B.C. Atkinson and D.B. Walden (Eds.). Aca- demic Press: New York. pp. 279–311. Percival, G.C., and C. Sheriffs. 2002. Identification of drought tolerant woody perennials using chlorophyll fluorescence. Journal Arborici- culture 28:215–224. Percival, G.C. 2005. Identification of foliar salt tolerance of woody peren- nials using chlorophyll fluorescence. Hortscience 40(6):1892–1897. Percival, G.C., and S. Boyle. 2005. Evaluation of microcapsule trunk in- jections for the control of apple scab and powdery mildew. Annals of Applied Biology 147:119–127. Percival, G.C. 2008. Paclobutrazol soil drenches provide partial reduc- tions in symptoms of apple scab of ornamental trees and Guignardia leaf blotch of horse chestnut. Journal of Environmental Horticulture 26(2):81–87. Percival, G.C., I.P. Keary, and A.L. Habsi Sulaiman. 2006. An assess- ment of the drought tolerance of Fraxinus genotypes for urban land- scape plantings. Urban Forestry Urban Greening 5:17–27. Percival, G.C., and K. Noviss. 2008. Triazole induced drought toler- ance in horse chestnut (Aesculus hippocastanum) Tree Physiology. 28(11):1685–1692. Pinhero, R., and R. Fletcher. 1994. Paclobutrazol and ancymidol protect corn seedlings from high and low temperature stress. Plant Growth Regulators 15:47–53. 219 Pregitzer, K.S., D.L. Dickmann, R. Hendrick, and P.V. Nguyen. 1990. Whole-tree carbon and nitrogen portioning in young hybrid poplars. Tree Physiology 7:79–93. Schnabel, G., and L. Parisi. 1997. Sensitivity of Venturia inaequalis to five DMI fungicides, including the new triazole fluquinconazole, and to pyrimethanil. Journal Plant Disease Protection 104:36–46. Sprugel, D.G., T.M. Hinckley, and W Schaap. 1991. The Theory and Prac- tice of Branch Autonomy – Annual Review of Ecology 22: 309–334. Still, J.R., and W.G. Pill. 2004. Growth and stress tolerance of tomato seedlings (Lycopersicon esculentum Mill.) in response to seed treat- ment with paclobutrazol. Journal Horticultural Science Biotechnol- ogy 79:197–203. Tyree, M.T., H. Cochard, P. Cruiziat, B. Sinclair, and T. Ameglio. 1993. Drought-induced leaf shedding in walnut: evidence for vulnerability segmentation. Plant Cell Environment 16:879–882. Von Caemmerer, S., and G.D. Farquhar 1981. Some relationships be- tween the biochemistry of photosynthesis and the gas exchange of leaves. Planta 153:376–387. Watson, G.W. 2001. Soil application paclobutrazol affects root growth, shot growth, and water potential of American elm seedlings. Environ- mental Horticulture 19:119–122. Willits, D.H., and M.M. Peet. 2001. Using chlorophyll fluorescence to model leaf photosynthesis in greenhouse pepper and tomato. Acta Horticulturae 507:311–315. Yamane, Y., T. Shikanai, Y. Kashino, H. Koike, and K. Satoh. 2000. Re- duction of QA in the dark: Another cause of fluorescence Fo increas- es by high temperatures in higher plants. Photosynthesis Research 63:23–34. Glynn C. Percival (corresponding author) Bartlett Tree Research Lab University of Reading - Biological Sciences 2 Earley Gate Whiteknights Berkshire, Reading RG6 6AU United Kingdom Kelly Noviss Bartlett Tree Research Lab University of Reading - Biological Sciences Reading, United Kingdom ©2010 International Society of Arboriculture
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