Abstract
Investigations using the Ouchtlerlony double-diffusion technique and immuno-electrophoretic analysis showed a much greater number and diversity of antigens amongst the North American species of Solomon than had been found previously amongst the South American ones. Double diffusion against antisera to S. tuberosum, S. acaule, S. iopetalum, S. bulbocastanum, and S. cardiophyllum subsp. ehrenbergii, showed a difference between the species in series Bulbocastana and Pinnati-secta, and those in series Longipedicellata and Demissa. This technique did not provide much information on the similarities or differences between the species within these two groups. However, immuno-electrophoretic analysis of the same species with the antisera to S. bulbocastanum and to S. iopetalum gave results which were easier to analyse, and provided much greater resolution of the individual species. At least one identical antigen was found in all the species studied. Some antigens were consistently present in all species in certain series, while others had no apparent significance in their occurrence. Three fast-moving antigens were found to have different, but characteristic, relative mobilities in different species in the series Bulbocastana and Pinnatisecta. The relative mobilities of these three components were similar in the two subspecies of S. cardiopkyllum and in S. sam-budnum which is considered to be a hybrid of subsp. ehrenbergii with S. pinnatisectum. A separate study on S. moreUiforme and S. clarum emphasized the distinctness of S. moreUiforme from all other potatoes, but indicated that S. clarum was more closely related to S. bulbocastanum and subsp. ehrenbergii than to S. tuberosum. With antisera to S. tuberosum and S. iopetalum on the one hand, and to S. bulbocastanum on the other, extracts of S. polyadenium were found to react more strongly than the species in series Bulbocastana and Pinnatisecta with the first two antisera, and more strongly than those in Longipedicellata and Demissa with the other antiserum. This indicated that S. polyadenium had some of the group-specific antigens from both groups, and therefore, that it may be in some intermediate position between these two major groups of species. Problems of evolutionary relationship between Mexican species and series are discussed in the light of serological, morphological, arid cytogenetical evidence.
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Claims 9
Claim · model-written summary
North American tuber-bearing Solanum species show a greater number and diversity of antigens than South American species.
Verbatim
t0“Tuber-bearing Solanums”
e1“Investigations using the Ouchtlerlony double-diffusion technique and immuno-electrophoretic analysis showed a much greater number and diversity of antigens amongst the North American species of Solomon than had been found previously amongst the South American ones”
Claim · model-written summary
Immuno-electrophoretic analysis gave much greater resolution of individual Solanum species than the double-diffusion technique.
Verbatim
t0“Tuber-bearing Solanums”
e3“immuno-electrophoretic analysis of the same species with the antisera to S. bulbocastanum and to S. iopetalum gave results which were easier to analyse, and provided much greater resolution of the individual species”
e1“Investigations using the Ouchtlerlony double-diffusion technique and immuno-electrophoretic analysis showed a much greater number and diversity of antigens amongst the North American species of Solomon than had been found previously amongst the South American ones”
Claim · model-written summary
At least one identical antigen was found in all Solanum species studied.
Verbatim
t0“Tuber-bearing Solanums”
e4“At least one identical antigen was found in all the species studied”
Claim · model-written summary
Some antigens were consistently present in all species of certain series.
Verbatim
t0“Tuber-bearing Solanums”
e5“Some antigens were consistently present in all species in certain series”
Claim · model-written summary
Three fast-moving antigens had different but characteristic relative mobilities among species of series Bulbocastana and Pinnatisecta.
Verbatim
t0“Tuber-bearing Solanums”
e6“Three fast-moving antigens were found to have different, but characteristic, relative mobilities in different species in the series Bulbocastana and Pinnatisecta”
Claim · model-written summary
Solanum moreUiforme is distinct from all other potatoes.
Verbatim
e7“emphasized the distinctness of S. moreUiforme from all other potatoes”
Claim · model-written summary
Solanum clarum is more closely related to S. bulbocastanum and subsp. ehrenbergii than to S. tuberosum.
Verbatim
e1“indicated that S. clarum was more closely related to S. bulbocastanum and subsp. ehrenbergii than to S. tuberosum”
Claim · model-written summary
Extracts of S. polyadenium reacted more strongly with the antisera than species of series Bulbocastana and Pinnatisecta (first two antisera) and Longipedicellata and Demissa (other antiserum).
Verbatim
e1“extracts of S. polyadenium were found to react more strongly than the species in series Bulbocastana and Pinnatisecta with the first two antisera, and more strongly than those in Longipedicellata and Demissa with the other antiserum”
Claim · model-written summary
Solanum polyadenium may hold an intermediate position between the two major species groups, having group-specific antigens from both.
Verbatim
e1“This indicated that S. polyadenium had some of the group-specific antigens from both groups, and therefore, that it may be in some intermediate position between these two major groups of species”