Complete chloroplast genome and phylogenetic analysis of Amorphophallus ochroleucus Hett. & V.D.Nguyen 2001 (Araceae)

Amorphophallus ochroleucus Hett. & V.D.Nguyen 2001, a perennial herbaceous plant in the genus Amorphophallus (Araceae family), is characterized by a tuberous root system, and is renowned for its unique pale-colored inflorescence and distinctive leaves. It is utilized as an ornamental plant in gardens and indoors. However, the genetic and phylogenetic relationships of this species remain largely unknown, leaving unanswered questions about its evolutionary trajectory. For the first time, this study presents the complete chloroplast genome of A. ochroleucus. The results demonstrate that the chloroplast genome spans 172,779 bp with an overall GC content of 35.15%, comprising a large single-copy (LSC) region of 92,449 bp, a small single-copy (SSC) region of 15,596 bp, and two inverted repeat (IR) regions each 32,367 bp in length. A total of 130 functional genes were annotated, including 85 protein-coding genes, 37 tRNA genes, and 8 rRNA genes. Phylogenetic analysis revealed that all Amorphophallus species formed a highly supported monophyletic clade, with A. ochroleucus showing closer affinity to A. paeoniifolius and A. titanum. The chloroplast genomic data provide a valuable resource for future taxonomic and evolutionary studies in Amorphophallus.