Plastomes of the subfamily Cactoideae (Cactaceae): genomic, structural and evolutionary aspects
type: CreativeWork
description: The family Cactaceae represents the greatest lineage of succulent plants, which contains a set of anatomical, morphological, and physiological modifications allowing adaptation and diversification in arid and semi-arid regions. Cactoideae is the richest subfamily in species diversity within Cactaceae. Representative species of this subfamily, such as Melocactus glaucescens, Lepismium cruciforme, and Schlumbergera truncata demonstrate interesting evolutionary aspects. They have different lifestyles and inhabit places with specific environmental conditions. Their distribution varies from a high degree of endemism and risk of extinction, to wide occurrence and status of extensive ornamental cultivation. Therefore, they are notable species to be used in studies related to plastid genomics. Plastid genomics allows analyzing and understanding phylogenetic and evolutionary relationships at the level of family/subfamily, as well as providing molecular markers that can help in conservation of natural resources. Although few cactus species with complete plastid sequences are available, many unusual features have been identified in the plastomes of the family. Thus, to expand the information concerning plastid evolution in Cactaceae, this study aimed at sequencing, assembling and analyzing the plastomes of M. glaucescens, L. cruciforme, and S. truncata. In addition, to provide complete plastome sequences, enabling analysis of plastome structures, frequency of codon usage, phylogeny, nucleotide diversity hotspots, gene divergence, signatures of positive selection, RNA editing sites and mapping of repetitive sequences. According to the data obtained, the plastomes showed several losses of genes and/or pseudogenization, including essential genes. Pseudogenization of the trnT-GGU gene in L. cruciforme was the first loss of gene functionality reported in the family. Moreover, M. glaucescens lost the trnV-GAC, trnV-UAC (common loss to the subfamily Cactoideae), and trnA-UGC genes, t…
abstract: The family Cactaceae represents the greatest lineage of succulent plants, which contains a set of anatomical, morphological, and physiological modifications allowing adaptation and diversification in arid and semi-arid regions. Cactoideae is the richest subfamily in species diversity within Cactaceae. Representative species of this subfamily, such as Melocactus glaucescens, Lepismium cruciforme, and Schlumbergera truncata demonstrate interesting evolutionary aspects. They have different lifestyles and inhabit places with specific environmental conditions. Their distribution varies from a high degree of endemism and risk of extinction, to wide occurrence and status of extensive ornamental cultivation. Therefore, they are notable species to be used in studies related to plastid genomics. Plastid genomics allows analyzing and understanding phylogenetic and evolutionary relationships at the level of family/subfamily, as well as providing molecular markers that can help in conservation of natural resources. Although few cactus species with complete plastid sequences are available, many unusual features have been identified in the plastomes of the family. Thus, to expand the information concerning plastid evolution in Cactaceae, this study aimed at sequencing, assembling and analyzing the plastomes of M. glaucescens, L. cruciforme, and S. truncata. In addition, to provide complete plastome sequences, enabling analysis of plastome structures, frequency of codon usage, phylogeny, nucleotide diversity hotspots, gene divergence, signatures of positive selection, RNA editing sites and mapping of repetitive sequences. According to the data obtained, the plastomes showed several losses of genes and/or pseudogenization, including essential genes. Pseudogenization of the trnT-GGU gene in L. cruciforme was the first loss of gene functionality reported in the family. Moreover, M. glaucescens lost the trnV-GAC, trnV-UAC (common loss to the subfamily Cactoideae), and trnA-UGC genes, t…
author: Dalla Costa, Tanara Pletsch
language: eng
keywords: Plantas suculentas - Evolução, Marcadores genéticos, Plastídeos, Ácido ribonucleíco - Síntese
date published: 2022-10-14
date modified: 2026-07-24T01:21:18Z
provider: Brazil UFV
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Universidade Federal de Viçosa

PropertyValue
property ID: DOI
value: 10.47328/ufvbbt.2023.003