Johnsongrass rhizome tissue can be infected by Colletotrichum sublineola. (September 2022)

• Record Type: Journal Article
• Authors: Ahn, Ezekiel; Fall, Coumba; Fan, Farrell; Prom, Louis K.; Magill, Clint
• Is Part Of: Physiological and molecular plant pathology. Volume 121(2022)
• Publication Date: 2022-09
• Subjects: Colletotrichum sublineola -- Johnsongrass -- Rhizome; Plant diseases -- Periodicals; Diseased plants -- Physiology -- Periodicals; Phytopathogenic microorganisms -- Host plants -- Periodicals; 632
• DOI: 10.1016/j.pmpp.2022.101860
• Languages: English
• ISSNs: 0885-5765

Abstract

Abstract: Four isolates of Colletotrichum sublineola were inoculated on excised leaf blades and rhizomes of nine Johnsongrass accessions and leaf blades of two sorghum accessions, BTx623 (+) and SC748-5 (−). Successful acervuli formations were observed in seven Johnsongrass accession- C. sublineola isolate combinations. Although infection leading to pathogen reproduction was rarely observed, this is the first study that confirmed Johnsongrass rhizomes can be colonized by C. sublineola . Highlights: Johnsongrass rhizome tissue could be infected by Colletotrichum sublineola. Acervulus formation was rare, even in positive cultivar by isolate inoculations. Johnsongrass cultivar SH1247 was infected by all 4 isolates tested. Three Johnsongrass cultivars were positive only with one isolate.