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Germination of L. fungicola spores requires an external nutrient source. Even though spores of the pathogen can germinate in sterile water, germination and germ tube growth are greatly stimulated by the addition of nutrients. It was proposed that carbon is the stimulating factor. [5]
O. clavigignenti-juglandacearum produces its spores asexually; its sexual form of reproduction has never been observed. Pycnidiospores are released during rainy periods. When the spores make contact with wounds or broken branches, they germinate and penetrate deep into the tree to produce cankers.
Pneumonia-like symptoms or meningitis may occur with a deeper or systemic infection. [2] Fungi are everywhere, but only some cause disease. [13] Fungal infection occurs after spores are either breathed in, come into contact with skin or enter the body through the skin such as via a cut, wound or injection. [3]
The fungal spores germinate at the anthesis and grow down the pollen tube without branching any hyphae outward. When the fungus reaches the bottom of the ovary, it leaves the pollen tube path and enters the vascular tissues where it branches its hypha. Approximately seven days into the infection, the mycelium produces conidia. The conidia are ...
The final stage is a fruiting body which pumps new spores out into the surrounding air. In other fields, the term has been applied to the decay of crop plants by fungi. In health and safety , the term is used to describe the deterioration of rubber , for example the cracking of rubber hoses.
It enters through small cuts in the skin to cause a fungal infection. [1] In cases of sporotrichosis affecting the lungs, the fungal spores enter by inhalation. [1] Sporotrichosis can be acquired by handling cats with the disease; it is an occupational hazard for veterinarians. [1] Treatment depends on the site and extent of infection. [1]
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The primary inocula are the ascospores, sexual spores which are produced in the perithecia. [4] Spores are forcibly discharged and can germinate within six hours upon landing on the plant surface. The scab disease is monocyclic; after one cycle of infection with ascospores, the fungus produces macroconidia by asexual reproduction. [5]