If we have less than 500 genes, we can use the Plant BioMart link https://plants.ensembl.org/biomart/martview . For a larger list, we can use the R Package biomaRt ( https://bioconductor.org/packages/release/bioc/html/biomaRt.html ) as given by Dr. Barah.Here, we have to set the database as (host = "plants.ensembl.org") and parse the list of OS IDs