Martin, N. E. 1972. Influence of blister rust on inorganic 

 solute concentrations in western white pine. Phytopa- 

 thology. 62(2): 226-229. 



Martin, N. E.; Welch, B. J. 1975. Single dimension, multi- 

 ple development thin-layer chromatography of sugars for 

 densitometric quantification. Res. Note INT-192. Ogden, 

 UT: U.S. Department of Agriculture, Forest Service, 

 Intermountain Forest and Range Experiment Station. 

 7p. 



Parker, J. 1959. Seasonal changes in white pine leaves: a 

 comparison of cold resistance and free-sugar fluctua- 

 tions. Botanical Gazette. 121: 46-50. 



Sbragia, R. J. 1975. Chemical control of plant diseases: an 

 exciting future. Annual Review of Phytopathology. 13: 

 257-269. 



Schoeneweiss, D. F. 1975. Predisposition, stress, and plant 

 disease. Annual Review of Phj-'topathology. 133: 193-211. 



Siddiqui, M. Q.; Manners, J. G. 1971. Some effects of 

 general yellow rust {Puccinia striiformis) infection on 

 14-carbon assimilation, translocation, and growth in a 

 spring wheat. Journal of Experimental Botany. 22(73): 

 792-799. 



Snedecor, G. W. 1956. Statistical methods. Ames, lA: 

 Iowa State University Press. 534 p. 



Steinhoff, R. J.; Hoff, R. J. 1972. Chilling requirements 

 for breaking dormancy of western white pine seedlings. 

 Res. Note INT-153. Ogden, UT: U.S. Department of 

 Agriculture, Forest Service, Intermountain Forest and 

 Range Experiment Station. 6 p. 



Welch, B. L.; Martin, N. E. 1972. Quantitative analysis of 

 sugars by densitometric inspection of thin-layer chrom- 

 atograms: analysis of method. Journal of Chromatog- 

 raphy. 72: 395-364. 



Welch, B. L.; Martin, N. E. 1974. Evidence of pectinase 

 activity between CronaHium Hbicola and Pinus mon- 

 ticola. Phytopathology. 64: 1287-1289. 



Welch, B. L.; Martin, N. E. 1975. Effects of Cronartium 

 ribicola on soluble sugars in Piniis monticola bark. 

 Phytopathologj'. 65: 1025-1026. 



Wicker, E. F.; Harvey, A. E. 1969. Dormancy and aecia 

 production by Cronartium ribicola. PhJ^opatholog}^ 

 59: 1057. Abstract. 



Wicker, E. F.; Mosher, D. P.; Wells, J. M. 1976. Organic 

 constituents of Cronartium ribicola pycnial fluid. 

 Phytopathologische Zeitschrift. 87: 97-106. 



Zimmerman, M. H. 1974. Storage, mobilization, and cir- 

 culation of assimilates. In: Zimmerman, M. H.; Brown, 

 C. L., eds. Trees: structure and function. New York: 

 Springer-Verlag: 307-324. 



Martin, Neil E. 1987. Soluble sugar concentrations in needles and bark of western 

 white pine in response to season and blister rust. Res. Pap. INT-379. Ogden, UT: 

 U.S. Department of Agriculture, Forest Service. Intermountain Research Station. 

 6 p. 



Amounts of soluble sugars in certain tissues of 12- to 16-year-old western white 

 pine {Pinus monticola) trees with blister rust cankers were compared with rust-free 

 trees. The host's seasonal growth cycle induced changes in sugar concentrations in 

 current, 1-, and 2-year needles, but the bole cankers did not. Amounts of bark sugars 

 characterized the activities of the rust fungus {Cronartium ribicola) as well as the fall, 

 winter, and summer seasons. The greatest differences in amounts of sugars in rusted 

 and nonrusted bark tissues were found in February. 



KEYWORDS: host-parasite physiology, Cronartium ribicola, Pinus monticola, soluble 

 carbohydrates, disease influences, host responses, forest tree pathology 



USDA policy prohibits discrimination because of race, 



^ color, national origin, sex, age, religion, or handicapping 



'^tlfe"i?te d « condition. Any person who believes he or she has been 



y&?t% ^ discriminated against in any USDA-related activity shoufd 



immediately contact the Secretary of Agriculture, 



Washington, DC 20250. 



6 



