Artículo
Multichromosomal structure and foreign tracts in the Ombrophytum subterraneum (Balanophoraceae) mitochondrial genome
Roulet, Maria Emilia
; Garcia, Laura Evangelina
; Gandini, Carolina Lia
; Sato, Hector Arnaldo
; Ponce, Gabriela Alejandra; Sánchez Puerta, María Virginia
Fecha de publicación:
08/2020
Editorial:
Springer
Revista:
Plant Molecular Biology
ISSN:
0167-4412
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Horizontal gene transfer (HGT) is frequent in parasitic plant mitochondria as a result of vascular connections established in host-parasite relationships. Recent studies of the holoparasitic plant Lophophytum mirabile (Balanophoraceae) revealed the unprecedented acquisition of a large amount of mitochondrial sequences from its legume host. We focused on a close relative, the generalist holoparasite Ombrophytum subterraneum, to examine the incidence of HGT events in the mitochondrial genome (mtDNA). The mtDNA of O. subterraneum assembles into 54 circular chromosomes, only 34 of which contain the 51 full-length coding regions. Numerous foreign tracts (totaling almost 100 kb, ~ 14% of the mtDNA), including 12 intact genes, were acquired by HGT from the Asteraceae hosts. Nine chromosomes concentrate most of those regions and eight are almost entirely foreign. Native homologs of each foreign gene coexist in the mtDNA and are potentially functional. A large proportion of shorter regions were related to the Fabaceae (a total of ~ 110 kb, 15.4%), some of which were shared with L. mirabile. We also found evidence of foreign sequences donated by angiosperm lineages not reported as hosts (Apocynaceae, Euphorbiaceae, Lamiaceae, and Malvales). We propose an evolutionary hypothesis that involves ancient transfers from legume hosts in the common ancestor of Ombrophytum and Lophophytum followed by more recent transfer events in L. mirabile. Besides, the O. subterraneum mtDNA was also subjected to additional HGT events from diverse angiosperm lineages, including large and recent transfers from the Asteraceae, and also from Lamiaceae.
Palabras clave:
EVOLUTION
,
HOLOPARASITE
,
HORIZONTAL GENE TRANSFER
,
LOPHOPHYTUM
,
MTDNA
,
SANTALALES
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IBAM)
Articulos de INST.DE BIOLOGIA AGRICOLA DE MENDOZA
Articulos de INST.DE BIOLOGIA AGRICOLA DE MENDOZA
Citación
Roulet, Maria Emilia; Garcia, Laura Evangelina; Gandini, Carolina Lia; Sato, Hector Arnaldo; Ponce, Gabriela Alejandra; et al.; Multichromosomal structure and foreign tracts in the Ombrophytum subterraneum (Balanophoraceae) mitochondrial genome; Springer; Plant Molecular Biology; 103; 6; 8-2020; 623-638
Compartir
Altmétricas