206 CEOWN-GALL OF PLANTS. 



Page. 



Crown-gall, effect of, on host plant 176 



growth of 159 



history of work on 13 



injury caused by 176, 183 



occurrence of, on wounds or grafts 165 



resemblance to animal tumors 161, 162 



club root 159 



structure of 159 



tissues primarily affected by 159 



Crown-gall organism, discussion of the question of species, varieties, and races of. 157 



organisms from various sources, cultural characters 140 



differences in 127 



Crystals, production of 125, 140 



Cuboni, work on rogna by 13, 14 



Cultural characters of Bacterium beticolum 194 



Bacterium tumefaciens from daisy 108, 140 



crown-gall organisms 140 



Culture media, vitality on 120 



Daisy, Bacterium tumefaciens from, capsules 107 



colonies, description of 110 



cultural characters 108, 140 



description of 105, 128 



fiagella 106,128 



inoculations 25 



involution forms 107, 128 



measurements 105, 128 



morphological characters 105, 128 



spores 106, 128 



stains, behavior toward 105, 107, 128 



vegetative cells 105, 128 



zooglcese 107 



Daisy, effect of crown-gall on 183 



immunity tests 177 



Daisy gall, description of 21 



isolations from 22, 24 



Decay of tumor, causes of 161, 175 



Delacroix, grape, injury due to crown-gall 190 



Dendrophagus globosus 19 



Description of Bacterium tumefaciens from daisy 105 



Dextrose and glycocoU in river water, growth in 153 



urea in river water, growth in 153 



in peptone water, growth in •- . . . 112, 115 



Diastasic action 110, 146 



Differential tests 115 



Distribution of crown-gall in Europe 13 



South Africa 20 



South America 19 



the United States 19, 183 



Dormant tissues, lesser susceptibility of 158 



Drying, susceptibility to 123 



Dwarfing of plants due to crown-gall 176 



Earle, peach trees, injury due to crown-gall 184 



213 



