Evento
Genetic code change in at-rich plastid genomes of two holoperasitic plants (balanophoraceae)
Ceriotti, Luis Federico
; Roulet, Maria Emilia
; Garcia, Laura Evangelina
; Sánchez Puerta, María Virginia
Tipo del evento:
Congreso
Nombre del evento:
XVII Congreso Latinoamericano de Genética; XLVII Congreso Argentino de Genética; LII Reunión Anual de la Sociedad de Genética de Chile; VI Congreso de la Sociedad Uruguaya de Genética; V Congreso Latinoamericano de Genética Humana; V Simposio Latinoamericano de Citogenética y Evolución
Fecha del evento:
06/10/2019
Institución Organizadora:
Asociacion Latinoamericana de Genética;
Asociación Argentina de Genética;
Sociedad de Genética de Chile;
Sociedad Uruguaya de Genética;
Red Latinoamericana de Genética Humana;
V Slace;
Título de la revista:
Revista de la Sociedad Argentina de Genética
Editorial:
Sociedad Argentina de Genética
ISSN:
1852-6322
Idioma:
Inglés
Clasificación temática:
Resumen
The family Balanophoraceae (order Santalales) encompasses 14 genera of obligate root holoparasites (i.e. completely nonphotosynthetic and host-dependent plants). As in other nonphotosynthetic angiosperms, plastid genomes (ptDNA) in Balanophora spp. are characterized by a high degree of reduction in size and gene content, and low levels of GC content. In addition, a novel type of genetic-code change was discovered, in which the TAG codon codes for tryptophan instead of being a stop-codon. In this study, we sequenced and analyzed ptDNA regions of Lophophytum mirabile and Ombrophytum subterraneum (Balanophoraceae). Total DNA from both species was sequenced with Illumina technology. Also, RNAseq was performed for L. mirabile. The ptDNA assembly was carried out based on genomic and transcriptomic paired-end reads. Plastid contigs of L. mirabile and O. subterraneum had an average AT content of 79.55% and 81.75%, respectively. Ribosomal and protein coding genes showed high substitution rates, as in other members of the family. We identified a different change in the genetic code of both ptDNAs; in this case TGA (typically a stop codon) codes for tryptophan. It represents the second case of a genetic-code change in land-plant ptDNAs. RNA editing was not found in the sequenced plastid genes.
Palabras clave:
HOLOPARASITE
,
GENETIC CODE
,
PLASTID
,
GENOME
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Identificadores
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Eventos(IBAM)
Eventos de INST.DE BIOLOGIA AGRICOLA DE MENDOZA
Eventos de INST.DE BIOLOGIA AGRICOLA DE MENDOZA
Citación
Genetic code change in at-rich plastid genomes of two holoperasitic plants (balanophoraceae); XVII Congreso Latinoamericano de Genética; XLVII Congreso Argentino de Genética; LII Reunión Anual de la Sociedad de Genética de Chile; VI Congreso de la Sociedad Uruguaya de Genética; V Congreso Latinoamericano de Genética Humana; V Simposio Latinoamericano de Citogenética y Evolución; Mendoza; Argentina; 2019; 279-279
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