Septoria cytisi Desm., Annls Sci. Nat., Bot., sér. 3 8: 24 (1847)
Index Fungorum number: IF 241056; Facesoffungi number: FoF xxx, Fig. 1
Description: see Quaedvlieg et al. (2013).
Material examined: see Quaedvlieg et al. (2013).
Fig. 1. Septoria cytisi (BPI USO 378994, redrawn from Quaedvlieg et al. 2013) a, b Conidia and conidiogenous cells of Septoria cytisi. Scale bars: a, b = 10 µm.
Importance and role
Importance of genus to ecosystem
Species of Septoria are pathogenic and cause leaf spots on wide range of hosts (Crous et al. 2013; Bakshi et al. 2019).
Industrial relevance and applications
There are currently no industrial applications of Septoria. Further studies are needed.
Septoria is a promising biocontrol agent. S. cirsii is a potential biocontrol agent of Canada thistle and its phytotoxin—ß-nitropropionic acid (Hershenhorn et al. 1993). S. hodgesii is a biocontrol agent for Myrica faya in Hawai‘i (Gardner 1999). S. passiflorae is a biocontrol agent for Passiflora tarminiana in Hawaii (Smith 2002).
Biochemical importance of the genus, chemical diversity or applications
Septoria produces a wide range of chemicals and phytotoxins such as ethylene, carbon nonoxide amongst others (Brown-Skrobot 1985; Sugawara et al. 1998).
Diversity of the genus
Although there are 913 Septoria epithets in Index fungorum, the actual number of species is less as many has been synonymized and transferred to other genera such as Sphaerulina, Asteromella, Phloeospora, Asteroma, Asteroma, Cercospora, Cylindrosporium, Diplodina, Lecanosticta, Mycosphaerella, Ophiodothella, Phaeoramularia, Phaeoseptoria, Phaeoseptoria, Phloeospora, Phlyctema, Phomopsis, Plectosphaerella, Polystigma, Pseudocercospora, Rhabdospora, Stagonospora, Stagonospora, Synchytrium amongst others.
Septoria comprises more than 500 species and is distributed on wide range of hosts such as Asteraceae, Caprifoliaceae, Fabaceae, Rosaceae, Sapindaceae amongst others. Septoria is reported worldwide such as Denmark, Illinois, Kazakhstan, Kirgizstan, Maharashtra, New York, Northwest European Russia, Wisconsin amongst others. Septoria taxonomy was largely dependent on associated host data due to limited morphological characters causing many species to be described based on host plants. Hence, Septoria needs revision as it is a complex genus.