Transcriptional response of two citrus species (Citrus sinensis and Poncitrus trifoliata) to SA treatment

Citrus Huanglongbing (HLB) caused by Candidatus Liberibacter is a calamitous disease. Salicylic acid (SA) is a vital phytohormone in plant innate immunity enhancement. To determine the relationship between SA response and HLB tolerance in citrus, the gene expression patterns in leaves from HLB-sensitive sweet orange (C. sinensis) and HLB-tolerant trifoliate orange (P. trifoliata) after SA treatment were investigated using Affymetrix microarrays.