Phytopathology. 2001 Jul;91(7):659-64. doi: 10.1094/PHYTO.2001.91.7.659.
ABSTRACT The germination and sporulation of Colletotrichum acutatum were characterized over time on strawberry leaves (cv. Tristar) and plastic coverslips incubated at 26 degrees C under continuous wetness. Conidia germinated within 3 h after inoculation and formed melanized appressoria with pores by 9 h after inoculation. Host penetration was not observed up to 7 days after inoculation. Production of secondary conidia on conidial and hyphal phialides began within 6 h after inoculation. Secondary conidiation was responsible for up to a threefold increase in the total number of conidia within 7 days after inoculation. Primary conidia and hyphae began to collapse 48 h after inoculation, whereas melanized appressoria remained intact. These findings suggest that appressoria and secondary conidia of C. acutatum produced on symptomless strawberry foliage may be significant sources of inoculum for fruit infections.
摘要 在 26℃、持续湿润条件下，研究了草莓叶片（品系 Tristar）和塑料载玻片上炭疽菌（Colletotrichum acutatum）的萌发和产孢过程。接种后 3 小时内，分生孢子开始萌发，并在接种后 9 小时形成具孔的黑化附着胞。接种后 7 天内未观察到对宿主的穿透。接种后 6 小时内，在分生孢子和菌丝孢梗上开始产生次生分生孢子。在接种后 7 天内，次生产孢导致分生孢子总数增加了两倍多。接种后 48 小时，初生分生孢子和菌丝开始崩溃，而黑化附着胞仍然完整。这些发现表明，无症状草莓叶片上产生的炭疽菌附着胞和次生分生孢子可能是果实感染的重要接种体来源。
