- 20 - 



Calif. 



Ind. 



Minn, 



N. Y. 



(Cornell) 



N. Dak. 



Va. 



Wis. 



Biochemical and Physiological Aspects of Disease Resistance 

 Inherited by Plants . To study intensively chemical composition 

 of selected strains and varieties of important crop plants relative 

 to resistance of specific diseases. 



Agron., PI. Path., Bot. 1552 



Disease Resistance Mechanisms in Plants , Learn (l) changes 

 in chemical composition of various plant tissues after inoculation 

 with selected pathogenic or non-pathogenic fungi; (2) effect of 

 compounds produced by plants in response to inoculation on invading 

 organisms and other organisms; (3) difference in extra-cellular 

 products of fungi grown on different plant tissues and extracts of 

 such tissues. 



Biochem., Bot. & PI. Path. 977 



Physiology of Plant Pathogens and Host-Parasite Relationships . 

 To determine (1) the role of hormonal mechanisms in sexual 

 processes of certain. fungi and also the role of hormones in certain 

 plane diseases; (2) the physiological nature of certain plant host- 

 parasite relationships; (3) the physical and chemical needs of 

 certain fungi for growth and reproduction. 



PI. Path., Bot. 2226 



Breeding and Testing Crop Plants . — A-Breeding Wheat, Oats, 

 and Barley for Yield, Quality, Winter Hardiness, Disease Resist- 

 ance and Stiff Straw. — B- Breeding Corn for Grain and Silage. 



PI. Brdg. 116 Coop. ARS 



Biochemical Differences in Relation to Rust Reaction . To 

 determine biochemical differences between varieties which may 

 lead to resistance of the host plant to the invasion of rust 

 parasite, particularly, to examine these factors which may affect 

 the nutrition of the invading parasite. 



Agr. Chem., PI. Path., Agron., Bot. 2-2 Coop. ARS 



Physiology of Disease Resistance of Corn and Tobacco . To 

 (1) work out biochemical or biological laboratory method to test 

 tobacco for resistance to black shank disease and corn for 

 resistance to certain fungus diseases; (2) correlate, if possible, 

 resistance of corn to certain fungus pathogens with physiological 

 processes which are initiated by specific genes; (3) undertake 

 comprehensive study of physiology of pathogens which cause black 

 shank disease of tobacco and corn leaf blight; and (k) obtain 

 better understanding of causes of disease resistance and physiology 

 of parasitism. 



PI. Path. & Physiol. 86019 



Nature of Disease Resistance in Plants . To determine nature 

 of the differences which commonly exist between individuals, 

 strains, varieties, and species of plants in their susceptibility 

 or resistance to disease. 



Biochem., PI. Path. 269 



