1955 Volume 20 Issue 2-3 Pages 59-64
The results in the previous paper suggested that the accelerated metabolism resulting in acceleration of protein synthesis accompanies the resistant reaction of potato tuber to the infection by P. infestans. In the present studies, several experiments were designed to ascertain the facts in respect to this problem.
Cut surface of potato tuber of interspecific hybrid “Hokkai No. 10” was inoculated with zoospore suspension of incompatible strains of P. infestans, H1 and H2, to which the variety examined is highly resistant, and with that of compatible strains, H3 and H7, to which the variety is susceptible (Table 1). Then physiological changes in the infected tissue were examined.
Ten, 15, 20 and 35hrs. after inoculation remarkable increase in O2 uptake had taken place in the tissue infected with H1 and H2, but not in the tissue infected with H3 and H7. At the same time increase in water soluble protein-N, and polyphenol content was observed in case of resistart reaction
It may be concluded that the increase in soluble protein and polyphenol compounds indicates the actual synthesis that has been resulted from excited metabolism induced by infection with P. infestans.
The present studies suggest that the resistance of plants to pathogen may be understood as a general reaction of living organisms to the injury, the process of which is given diagramatically in Fig 2.
