Ebner, K. E. 1970. A biological role for alpha-lactalbumin as a 

 component of an enzyme requiring two proteins. Accounts of 

 Chemical Research. 3:41-47. 



Tsai, C. M., N. Holmberg, and K. E. Ebner. 1970. Purification, 

 stabilization, and properties of bovine mammary UDP-galac- 

 tose 4-epimerase. Arch. Biochem. Biophys.. l'(6;2.33-244. 



Expansion and Improvement of Crop 

 Germplasm Resources 



The USDA plant introduction system acquires 

 7,500 to 10,000 new items annually. Sizeable ef- 

 fort is involved in the characterization, documen- 

 tation, and manipulation of the existing germ- 

 plasm bases into forms that are useful in crop- 

 breeding programs, the ultimate output of which 

 are the more than 200 improved breeding lines 

 and varieties released annually. Much basic effort 

 is involved in characterizing physiological, bio- 

 chemical, quality, and other attributes; determining 

 the nature of resistance to pests and stresses; de- 

 termining mechanisms of inheritance; and devis- 

 ing improved genetic techniques and evaluation 

 procedures to facilitate the germplasm effort. 



Bell, A. A 1976. Phytoalexin Production and Verticillium Wilt 

 Resistance in Cotton. Phytopathology, 59:1119-1127. 



Buckner, R. C. L. P. Bush, and P. B. Burrus. 1973. Variabili- 

 ty and hertiability of perloline in Festuca spp., Lolium spp.. 

 and Lo/ium-Fes^ucca hybrids. Crop Sci. 13:666-669. 



Burk, L. G. 1967. An interspecific bridge-cross: Nicotiana 

 Rapanda thru N. Sylvesths to N. Tobacum. Journal of Heredi- 

 ty, 58:215-218. 



Burton, Glenn W. and Wayne W. Hanna. 1976. Ethidium 

 bromide induced cytoplasmic male sterility in pearl millet. 

 Crop Sci. 16:731-732. 



Bush. 1.. P., C. Streeter and R. C. Buckner. 1970. Inhibition 

 of in vitro ruminal cellulose digestion by proline. Crop Sci. 

 10:108-109. 



Deahl, K L., R. J. Young, and S. L. Sinden. 1973. A study of 

 the relationship of late blight resistance to glycoalkaloid con- 

 tent in 15 potato clones. American Potato Journal, 50: 248-253. 



Pick, G. N., D. E. Zimmer, J. Dominguez Gimenez, and D. A. 

 Rehder. 1974. Fertility restoration and variability for plant and 

 seed characteristics in wild sunflowers. Proc. Sixth Inter. Sun- 

 flower Conf. 333-337, Bucharest, Romania. July 22-24. 



Pick, G. N. and D. E. Zimmer. 1975. Linkage tests among 

 genes for six qualitative characters in sunflowers. Crop Sci., 



15:777-779. 



Gimenez, Juan Dominguez and Gerhardt N. Pick. 1975. Fertil- 

 ity restoration of male-sterile cytoplasm in wild sunflowers. 

 Crop Sci. 15:724-726. 



Howell. R. K., T. E. Devine. and C H. Hanson. 1971. Resist- 

 ance of selected alfalfa strains to ozone. Crop. Sci., 11:114- 

 115. 



Jenkins, J. J. and W. L. Parrott. 1971. Effectiveness of Frego 

 Bract as a Boll Weevil resistance character in cotton. Crop. 

 Sci. 11:739-743. 



Legg, Paul D., James F. Chaplin, and Glenn B. Collins. 1969. 

 Inheritance of percent total alkaloids in Nicotiana Tobacum L. 

 Journal of Heredity, 60:213-217, 1969. 



Perdue, R. E., L. A. Spetzman and R. G. Powell. 1970. Ce- 

 phalotaxus - source of Harringtonine, a promising new anti- 

 cancer alkaloid. Amer. Horticultural Magazine 49:19-22. 



Snyder, F. W. and G. E. Carlson. 1976. Selecting for genetic 

 control of photosynthate partitioning in sugarbeet. Agronomy 

 Abstracts p. 77. 



-Stipanivic R. D.. A. A. Bell, M. E. Mace, and C. R. Howell. 

 1975. Antimicrobilia Terpenoids of Gossypium: 6-methoxy- 

 gossypol and 6,6-dimethoxygossypol. Phytochemistry 14:1077- 

 1081. 



Weibe, G. A. and R. T. Ramage. 1969. Hybrid barley. Second 

 Inter Genetics Symp. Barley Genetics 11:287-291. 



Photosynthesis 



All research on photosynthesis is necessarily 

 mission-oriented, since this process accounts di- 

 rectly or indirectly for all food production. Signif- 

 icant basic research contributions in the past dec- 

 ade have increased our understanding of impor- 

 tant enzymatic reactions, biochemical mecha- 

 nisms, interactions with respiration, the signifi- 

 cance of environmental and chemical variables, 

 energy balances, and canopy efficiencies under 

 field conditions. Computer models of photosyn- 

 thesis and respiration are now facilitating the 

 identification of important gaps in knowledge and 

 the evaluation of stochastic variables. 



Allen, L. H., Jr. 1974. Photosynthesis in plant canopies. Effect 

 of light response curves and radiation source geometry. Photo- 

 synthetica 8:29-40. 



Aston, A. R., R. J. Millington and D. B. Peters. 1973. The 

 energy balance of leaves. UNESCO Symp. on Plant Response 

 to Climatic Factors, Uppsala, Sweden Proc, pp. 37-44. 



Baker, D. N., J. D. Hesketh, and W. G. Duncan. 1972. Simu- 

 lation of growth and yield in cotton: I. Gross photosynthesis, 

 respiration and growth. Crop Sci. 12:431-435. 



Barnes, D. K.. R. B. Pearce, G. E. Carlson, R. H. Hart, and 

 C. H. Hanson. 1969. Specific leaf weight differences in alfalfa 

 associated with variety and plant age. Crop Sci. 9:421-423. 



Chatterton, N. J. 1972. Product Inhibition of photosynthesis in 

 alfalfa leaves as related to specific leaf weight. Crop Sci. 

 13:284-285. 



Chollet, R., and W. L. Ogren. 1973. Photosynthetic carbon 

 metabolism in isolated maize bundle sheath strands. Plant 

 Physiol. 51:787-792. 



Hesketh, J. D., J. M. McKinion, J. W. Jones, D. N. Baker, H. 

 C. Lane, A. C. Thompson, and R. F. Colwick. 1974. Problems 

 In building computer models for photosynthesis and respira- 

 tion. Proc. Environmental and Biological Control of Photosyn- 

 thesis Symposium, Hasselt, Belgium. Aug. 26-30. pp. 53-60. 



Irvine, J. E. 1972. Canopy characters and their relation to the 

 yield of sugarcane varieties. Proc. ASSCT 2:73-75. 



l.aing, W. A., W. L. Ogren and R. H. Hageman. 1974. Regula- 

 tions of soybean net photosynthetic COi fixation by the inter- 



AGRICULTURE 



