茶白紋羽病に関する研究(第 1 報)

概要

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1). The phytopathological characters of Rosellinia sp. causing root rot on tea were investigated using three cultural strains which differed some what in mycelial state and size of hyphae. 2). The optimum temperature for hyphal growth was about 24℃ for three cultural strains. At 0℃ all three cutural strains survived for 15 days, but after 35 days strain R2 was found dead. The other two strains were still found to be alive. At 32℃ all strains appeard to be die in 7 days. 3). Every cultural strains grown on media containing cellulose as a carbon source indicated reactions of cellulose decomposition. The optimum initial H-ion concentrations of these media to cellulose decomposition were pH 5.4 for R1 and R3,and 4.2 for R2. 4). The three cutural strains showed enzymes for lignin decomposition. The presence of tyrosinase was indicated slightly in R1 only. 5). Three cultural strains inoculated into soil inhibited germination of soya beans to about 45%. 6). From the results of inoculation to tea seedlings, it was found that the disease severity was in the order of mid-summer, early summer, and early winter. Some considerations were discussed on the factors causing seasonal differences in the disease severity.
京都府立大学の論文
1953-09-01