|Title:||Curvularia lunata菌之生理性質及其對水稻病原性之研究||Other Titles:||Physiological Study of Curvularia Lunata and Its Pathogenicity to Rice Plant||Authors:||朱啟魯
|Issue Date:||5-Sep-1973||Publisher:||農業試驗所||Journal Volume:||22||Journal Issue:||3||Start page/Pages:||213-220||Source:||農業研究||Abstract:||
4.最易為C. lunata菌利用之碳素源為Glucose, Fructose, Dextrin, Sucrose及Maltose，其次為Galactose, Lactose, Xylose及Raffinose，不易利用之碳素源有Inulin, Mannitol, Sorbose及Cellulose。
5.供試之氮素源中，Peptone, Asparagine, Asparticacid，及Glutamine對C. lunata菌之生長係良好之氮素源，其次為Urea及Leucine。最差之氮素源為NaNO3，Methionine及(NH4)2 SO4。
1. The fungus, Curvularia lunata, was pathogenic to rice plant. The lesion caused by this fungus on rice plant was similar to which caused by Pyricularia oryzae. Its conidia are dark, more or less fusiform, 4 celled, end cell lighter, typically bent or curved, with one of the central cell enlarged. The size of the fungus measured 24.3 x 10.8 in the average of 100 spores.
2. The effect of temperature on development of the fungus showed that its optimum temperature being around 30°C and there were no development of the fungus when the temperature were at 5°C and 40°C. Simultaneously, this fungus was shown to be highly tolerable to high temperature as its thermal death point was as high as 62°C.
3. The effect of the pH value on development of Curvularia lunata showed that the optimum and maximum value for the fungus were pH 8.0 and 12.3, respectively.
4. The ability of C. lunata to utilize certain carbon compounds were in many patterns. This fungus well utilized glucose, fructose, dextrin, sucrose and maltose. The carbon compounds such as inulin, mannitol, sorbose and cellulose were poor carbon sources for the development of the fungus.
5. Among the various nitrogen compounds tested, peptone, asparagine, aspartic acid and glutamine were the good sources for the development of C. lunata while the sources of NaNO3, methionine, and [(NH4)2 SO4] were the poor ones for the fungus.
6. So far as the inoculation concerned, wound infection showed high percentage of infection indicating that the main pathway of infection of the fungus to rice plant might be through the wounding of the plant.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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