Evolution and classification of hornworts new insights from the first plastome-based phylogeny

Evolution and classification of hornworts : new insights from the first plastome-based phylogeny

© 2025 The Author(s). New Phytologist © 2025 New Phytologist Foundation.

Détails bibliographiques
Publié dans:The New phytologist. - 1979. - (2025) vom: 21. Okt.
Auteur principal: Xu, Hao (Auteur)
Autres auteurs: Shen, Chao, Huang, Wen-Zhuan, Cargill, D Christine, Villarreal A, Juan Carlos, Chantanaorrapint, Sahut, Promma, Chatchaba, Wei, Yu-Mei, Ho, Boon Chuan, Quandt, Dietmar, Peng, Tao, Xiang, You-Liang, Zielman, H Rudi, Bakalin, Vadim A, Shu, Lei, Zhu, Rui-Liang
Format: Article en ligne
Langue:English
Publié: 2025
Accès à la collection:The New phytologist
Sujets:Journal Article Cretaceous–Paleogene extinction event RNA editing divergence time new combination new species plastid genome
Description
Résumé:© 2025 The Author(s). New Phytologist © 2025 New Phytologist Foundation.
Hornworts (Anthocerotophyta) represent a key lineage for understanding fundamental questions in land plant evolution, but their phylogeny and evolutionary history are still not well understood, primarily due to limited genomic resources and insufficient taxon sampling. We conducted comparative genomic analyses of 106 hornwort plastid genomes, including 91 newly generated ones. RNA editing sites were identified by integrating transcriptome data and in silico predictions. Additionally, a new method inspired by marker-capture strategies was proposed to estimate the total number of U-to-C editing sites. Hornwort plastomes are larger than those of liverworts and mosses, with rare gene loss or pseudogenization. Both C-to-U and U-to-C RNA editing occur across all lineages except Leiosporoceros. Diversification rate analyses indicate a major shift between c. 100 and 50 million years ago, possibly linked to the Cretaceous-Paleogene extinction event. Both morphological and molecular evidence support the merging of Folioceros into Anthoceros, and the recognition of two new species in the small genera Paraphymatoceros and Phymatoceros, respectively. This study presents the first large-scale plastome phylogeny of hornworts, introduces a DNA-only method for estimating the number of U-to-C RNA editing sites, and updates the classification. These results contribute broadly to our understanding of early land plant evolution
Description:Date Revised 21.10.2025
published: Print-Electronic
Citation Status Publisher
ISSN:1469-8137
DOI:10.1111/nph.70672