イネ病原菌胞子の発芽力におよぼす静水圧の影響 : 植物疾病に対する物理的要因の影響 III

概要

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1. The conidia of Cochliobolus miyabeanus and the chlamydospores of Ustilaginoidea virens, and the conidia of Piricularia oryzae 1ost germinabi1ity by compression of 2,500 kg/cm^ 2 and 2,000 kg/cm^ 2, respectively,for 10 minutes. The germ-tubes of C. miyabeanus affected by hydrostatic pressure were slender and shorter than those of the normal. Conidia of C. miyabeanus compressed at 2,000 kg/cm^ 2 for 10 minutes, and those of P oryzae pressured at l,000 kg/cm^ 2 for 20-30 minutes, germinated bearing a 3-5-branched germ-tube. 2. The germination index of these fungi decreased with the length of time of compression at l,000, 1,500 and 2,000 kg/cm^ 2, except of that of C. miyabeanus which compressed at l,000 kg/cm^ 2. Tolerance of conidia to the pressure seemed to be largest in C. miyabeanus, though tolerance is variable with spore individuals. The conidia of Poryzae, however, were found to be 1owest in pressure tolerance among the fungi employed, and variation in tolerance due to spore individual was also restricted. 3. E1ongation of the germ-tubes of the conidia of C. miyabeanus and P. oryzae was restricted in parallel with increase of pressure.(Received August 8, 1966)
日本植物病理学会の論文
1967-06-30