Ритисмовые - Rhytismatales 10/1/10—4/23/23
The Rhytismatales is an order of fungi within the class Leotiomycetes of the Ascomycota phylum. This diverse group of fungi is characterized by its members' ecological roles as plant pathogens, saprobes, or endophytes, and their unique fruiting bodies, which often display conspicuous structures.
Fungi within the Rhytismatales order produce fruiting bodies known as apothecia, which are typically disk- or cup-shaped structures that vary in size, color, and morphology. These apothecia produce asci, the spore-producing cells characteristic of the Ascomycota phylum. Each ascus generally contains eight spores, although this may vary depending on the species.
Members of the Rhytismatales order exhibit diverse host preferences, with some species having a narrow host range while others are more generalist in nature. They often cause leaf spot diseases, needle blights, and other foliar infections in a wide variety of plants, including trees, shrubs, and herbaceous plants. Some species, however, function as saprobes or endophytes, decomposing dead plant material or living within plant tissues without causing harm, respectively.
Notable families within the Rhytismatales order include the Rhytismataceae and Melogrammataceae families. Rhytismataceae contains species like Rhytisma acerinum, which causes the distinctive tar spot disease on maple and sycamore trees, while Melogrammataceae includes fungi like Melogramma campylosporum, a saprobe found on decaying wood.
While the diseases caused by Rhytismatales fungi can be unsightly and sometimes result in reduced growth or premature leaf drop, they rarely cause significant long-term damage to the host plants. In most cases, control measures, such as the removal of infected leaves or the use of fungicides, are not necessary.
The Rhytismatales order is a fascinating group of fungi that contribute to the intricate relationships between plants and fungi within ecosystems. These fungi serve as important subjects of study for plant pathologists, mycologists, and naturalists who seek to understand their role in plant health and disease dynamics. Additionally, the Rhytismatales order offers insights into the complex world of fungal diversity and the various ecological roles fungi play in nature.
