The aeciospores are able to germinate on the cereal host but not on the alternative host ( they are produced on the alternative host, which is usually barberry ).
12.
This fungus produces four out of five of the spores known to be produced by the class Urediniomycetes during its life cycle . ( Teliospores, Basidiospores, Spermatia, and Aeciospores.
13.
Signs of pine-pine gall rust include the pale yellow aecia ( 1-8mm in diameter ) formed on galls in spring as well as the yellow-orange aeciospores contained within.
14.
Fungi that lack pycniospores and aeciospores in their life cycle are termed "'microcyclic "'and always have an autoecious life cycle . "'Demicyclic "'fungi delete the uredial ( repeating ) stage from the life cycle.
15.
Anton de Bary later conducted experiments to observe the beliefs of the European farmers regarding the relationship between the rust and barberry plants, and after successful attempts to connect the basidiospores of the basidia stage to barberry, he also identified that the aeciospores in the aecia stage reinfect the wheat host.
16.
When " C . umbellata " is infected by the rust aeciospores from the pine host, yellow, blister-like spots bearing urediniospores appear on the leaves of the plant within 20 days . In the following weeks, teliospores develop on brown, hairlike telia that germinate to produce basidiospores, the fungal life stage capable of infecting pines.
17.
In macrocyclic and demicyclic life cycles, the rust may be either host alternating ( heteroecious ), i . e ., the aecial state is on one kind of plant but the telial state on a different and unrelated plant, or non-host alternating ( autoecious ), i . e ., the aecial and telial states on the same kind of plant . "'Heteroecious "'rust fungi require two unrelated hosts to complete their life cycle, with the primary host being infected by aeciospores and the alternate host being infected with basidiospores.
