Couteaudier Y, Alabouvette C
Institut national de la recherche agronomique, Station de recherches sur la flore pathogène dans le sol, Dijon, France.
Can J Microbiol. 1990 Aug;36(8):551-6. doi: 10.1139/m90-096.
The kinetics of survival and inoculum potential of Fusarium oxysporum f.sp. lini were studied in soil. Two types of inoculum were compared: microconidia freshly harvested from a laboratory-grown culture and microchlamydospores produced in sterilized soil. Introduced at the same inoculum densities into a natural soil, the two types of inoculum showed similar behavior; the inoculum densities changed little with time, at least during 100 days. However, the two types of inoculum did differ in disease potential. A higher percentage of microchlamydospores than microconidia germinated in the rhizosphere of flax seedlings, and the heterotrophic fluorescein diacetate hydrolysing activity of the microchlamydospores was 100 times higher than that of microconidia. Moreover, the microchlamydospores produced more disease on flax than the microconidia even at a much lower inoculum density.
在土壤中研究了尖孢镰刀菌亚麻专化型的存活动力学和接种体潜能。比较了两种接种体：从实验室培养物中新鲜收获的微分生孢子和在灭菌土壤中产生的微厚垣孢子。以相同的接种密度引入天然土壤中，两种接种体表现出相似的行为；接种密度随时间变化很小，至少在100天内如此。然而，两种接种体在致病潜能上确实存在差异。在亚麻幼苗根际，微厚垣孢子萌发的比例高于微分生孢子，且微厚垣孢子的异养荧光素二乙酸酯水解活性比微分生孢子高100倍。此外，即使接种密度低得多，微厚垣孢子对亚麻造成的病害也比微分生孢子更多。
