Comparative transcriptome profiling of resistant and susceptible rice genotypes in response to the seedborne pathogen Fusarium fujikuroi

BMC Genomics

Research Article

Ilenia Siciliano¹  Maria Lodovica Gullino²  Davide Spadaro²  Greice Amaral Carneiro²  Slavica Matić²  Chiara Biselli³  Paolo Bagnaresi³  Luigi Orru’³  Giampiero Valé⁴ 

[1] AGROINNOVA – Centre of Competence for the Innovation in the Agro-environmental Sector, University of Turin, Largo Paolo Braccini 2 (ex-Via L. da Vinci 44), 10095, Grugliasco, TO, Italy;AGROINNOVA – Centre of Competence for the Innovation in the Agro-environmental Sector, University of Turin, Largo Paolo Braccini 2 (ex-Via L. da Vinci 44), 10095, Grugliasco, TO, Italy;Department of Agricultural, Forestry and Food Sciences (DISAFA), University of Turin, Largo Paolo Braccini 2 (ex-Via L. da Vinci 44), 10095, Grugliasco, TO, Italy;Council for agricultural research and economics (CREA), Genomics Research Centre, via S. Protaso, 302 I −29017, Fiorenzuola d’Arda, PC, Italy;Council for agricultural research and economics (CREA), Rice Research Unit, S.S.11 to Torino, km 2,5, 13100, Vercelli, Italy;

关键词: Bakanae disease;    Fusarium fujikuroi;    Gibberellin;    Plant-fungus interaction;    Rice;    RNA-seq;    Transcriptome;   

DOI  :  10.1186/s12864-016-2925-6

 received in 2015-12-18, accepted in 2016-07-08,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundFusarium fujikuroi is the causal agent of bakanae, the most significant seed-borne disease of rice. Molecular mechanisms regulating defence responses of rice towards this fungus are not yet fully known. To identify transcriptional mechanisms underpinning rice resistance, a RNA-seq comparative transcriptome profiling was conducted on infected seedlings of selected rice genotypes at one and three weeks post germination (wpg).ResultsTwelve rice genotypes were screened against bakanae disease leading to the identification of Selenio and Dorella as the most resistant and susceptible cultivars, respectively. Transcriptional changes were more appreciable at 3 wpg, suggesting that this infection stage is essential to study the resistance mechanisms: 3,119 DEGs were found in Selenio and 5,095 in Dorella. PR1, germin-like proteins, glycoside hydrolases, MAP kinases, and WRKY transcriptional factors were up-regulated in the resistant genotype upon infection with F. fujikuroi. Up-regulation of chitinases and down-regulation of MAP kinases and WRKY transcriptional factors were observed in the susceptible genotype. Gene ontology (GO) enrichment analyses detected in Selenio GO terms specific to response to F. fujikuroi: ‘response to chitin’, ‘jasmonic acid biosynthetic process’, and ‘plant-type hypersensitive response’, while Dorella activated different mechanisms, such as ‘response to salicylic acid stimulus’ and ‘gibberellin metabolic process’, which was in agreement with the production of gibberellin A3 in Dorella plants.ConclusionsRNA-seq profiling was performed for the first time to analyse response of rice to F. fujikuroi infection. Our findings allowed the identification of genes activated in one- and three- week-old rice seedlings of two genotypes infected with F. fujikuroi. Furthermore, we found the pathways involved in bakanae resistance, such as response to chitin, JA-dependent signalling and hypersensitive response. Collectively, this provides important information to elucidate the molecular and cellular processes occurring in rice during F. fujikuroi infection and to develop bakanae resistant rice germplasm.

【 授权许可】

CC BY   
© The Author(s). 2016