title: Differential gene expression for Curvularia eragrostidis pathogenic incidence in crabgrass (Digitaria sanguinalis) revealed by cDNA-AFLP analysis.
abstract: Gene expression profiles of Digitaria sanguinalis infected by Curvularia eragrostidis strain QZ-2000 at two concentrations of conidia and two dew durations were analyzed by cDNA amplified fragment length polymorphisms (cDNA-AFLP). Inoculum strength was more determinant of gene expression than dew duration. A total of 256 primer combinations were used for selective amplification and 1214 transcript-derived fragments (TDFs) were selected for their differential expression. Of these, 518 up-regulated differentially expressed TDFs were identified. Forty-six differential cDNA fragments were chosen to be cloned and 35 of them were successfully cloned and sequenced, of which 25 were homologous to genes of known function according to the GenBank database. Only 6 genes were up-regulated in Curvularia eragrostidis-inoculated D. sanguinalis, with functions involved in signal transduction, energy metabolism, cell growth and development, stress responses, abscisic acid biosynthesis and response. It appears that a few pathways may be important parts of the pathogenic strategy of C. eragrostidis strain QZ-2000 on D. sanguinalis. Our study provides the fundamentals to further study the pathogenic mechanism, screen for optimal C. eragrostidis strains as potential mycoherbicide and apply this product to control D. sanguinalis.
authors.affiliation: Weed Research Laboratory, Nanjing Agricultural University, Nanjing, People's Republic of China ; Agricultural College, Hebei University of Engineering, Handan, People's Republic of China.
authors.forename: Jianshu
authors.initials: J
authors.lastname: Wang
authors.forename: Xuemin
authors.initials: X
authors.lastname: Wang
authors.forename: Bohua
authors.initials: B
authors.lastname: Yuan
authors.forename: Sheng
authors.initials: S
authors.lastname: Qiang
mesh_terms: D054458:Amplified Fragment Length Polymorphism Analysis; D001203:Ascomycota; D031746:Digitaria / Q000235:genetics* / Q000378:metabolism / Q000382:microbiology; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D015994:Incidence; D010935:Plant Diseases / Q000235:genetics* / Q000382:microbiology / Q000706:statistics & numerical data; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism
chemical_list: D012333:RNA, Messenger