404 



SUBJECT INDEX 



Phloem cells, tobacco mosaic virus and, 



26-27 

 Phlox drummondii, plant viruses and, 89- 



90 

 Photoreactivation 

 kinetics of, 371-372 

 reactivable sector and, 371 

 Photorestoration, induction reversal, lyso- 



genic bacteria and, 330 

 Phyllotreta sp., see Turnip flea beetle 

 Pinto bean, tobacco mosaic virus and, 5 

 Plantago lanceolata; ribgrass virus and, 91, 



131 

 Plant-insect viruses, evolution of, 182-183 

 Plant leaves, organization of, 2-3 

 Plant viruses, see also specific virus disease, 

 severity of, 35 

 genetics and, 130 

 mutation 



frequency of, 129-130 

 significance of, 130 

 terminology of, 128-129 

 nucleic acids, 51-53 



deoxyribonucleic acids and, 60 

 fine structure of, 55-60 

 general structure of, 53-54 

 physical properties of, 60-61 

 ribonucleic acids and, 54-55 

 nucleic acid analogs and, 115-119 

 nucleic acid studies of, 35, 36 

 Phlox drummondii and, 89-90 

 protein components 



polj'peptide chain structure methods 



and, 48-51 

 polypeptides and, 44-45 

 protein composition determination 

 and, 45-48 

 protein, studies of, 35, 36 

 purification 



centrifuge separation techniques and, 



40-42 

 clarification and, 39-40 

 course of, 42-43 

 growing host plants and, 37-38 

 handling virus-containing sap and, 38 

 number purified and, 36 

 requirements for, 36-37 

 ribonucleic acid composition of, 55 

 Plant virus multiplication, in insect 

 vectors, 161-173 



Plant virus strains 



characteristics of, 130-131 

 chemistry 



nucleic acids and, 146-150 

 protein components and, 139-145 

 relationship criteria 



chemical property coincidence and, 



134, 137-138 

 cross-protection tests and, 133, 135- 



136 

 destruction resistance similarity and, 



134, 137 

 evaluation of, 138-139 

 host genetic change similarity and, 



133, 136-137 



host range similarity and, 133, 136 

 physical property coincidence and, 



134, 137-138 



serological cross reactions and, 133, 



134-135 

 transmission similaritj^ and, 133, 136 

 securing methods 



different host passage and, 1 32 

 distinctive spot isolation and, 131- 



132 

 elevated temperature exposure and, 



132-133 

 local lesion isolation and, 133 

 naturally segregated strains and, 131 

 Plaque-type mutants, bacteriophage and, 



282-284 

 Poliomyelitis virus, 8 

 Polypeptide chains 

 viral proteins 



amino acid composition determina- 

 tion and, 48 

 chain end determination and, 49 

 sequence determination and, 49-51 

 Potato latent mosaic virus, see Potato X 



virus 

 Potato spindle tuber virus, 158-159 

 Potato X virus, 55, 63, 145, 146, 147, 148, 

 149 

 Cyphomandra betacea and, 113 

 host transfer and, 113 

 purification of, 114-115 

 Potato yellow-dwarf virus 



Aceratagallia sanguinolenta and, 171 

 New Jersey, transovarial passage and, 

 172 



