静水圧で処理したイネいもち病菌およびイネごま葉枯病菌分生胞子の病原性 : 植物疾病に対する物理的要因の影響 V

概要

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When conidia of Pyricularia oryzae were compressed at 0, 500, 1,000, 1,500, and 1,800 kg/cm^2 for 10 minutes, the germination was reduced from 97% to 16%. The infectivity of these conidia to rice leaves was correspondingly reduced. At 0-1,000 kg/cm^2 the number of conidia with appressoria exceeded those with ordinary germ tubes, whereas at 1,500 and 1,800 kg/cm^2 conidia with appressoria were less than those with germ tubes. With increasing pressures (0-1, 800 kg/cm^2) the number of susceptible type lesions decreased from 7.5 to 0.5/10cm of rice leaf, whereas the number of resistant type lesions remained approximately constant at 1/10 cm. When conidia of Cochliobolus miyabeanus were exposed to increasing pressures as above, the germination and infection were reduced, but not as much as with P. oryzae. Conidia exposed to pressures above 1,500 kg/cm' formed smaller lesions on rice leaves than those exposed to lower pressures.
日本植物病理学会の論文
1972-03-20