학술논문
Fern genomes elucidate land plant evolution and cyanobacterial symbioses
Document Type
Article
Author
Li, Fay-Wei; Brouwer, Paul; Carretero-Paulet, Lorenzo; Cheng, Shifeng; de Vries, Jan; Delaux, Pierre-Marc; Eily, Ariana; Koppers, Nils; Kuo, Li-Yaung; Li, Zheng; Simenc, Mathew; Small, Ian; Wafula, Eric; Angarita, Stephany; Barker, Michael S.; Bräutigam, Andrea; dePamphilis, Claude; Gould, Sven; Hosmani, Prashant S.; Huang, Yao-Moan; Huettel, Bruno; Kato, Yoichiro; Liu, Xin; Maere, Steven; McDowell, Rose; Mueller, Lukas A.; Nierop, Klaas G. J.; Rensing, Stefan A.; Robison, Tanner; Rothfels, Carl J.; Sigel, Erin M.; Song, Yue; Timilsena, Prakash R.; Van de Peer, Yves; Wang, Hongli; Wilhelmsson, Per K. I.; Wolf, Paul G.; Xu, Xun; Der, Joshua P.; Schluepmann, Henriette; Wong, Gane K.-S.; Pryer, Kathleen M.
Source
Nature Plants; July 2018, Vol. 4 Issue: 7 p460-472, 13p
Subject
Language
ISSN
2055026X; 20550278
Abstract
Ferns are the closest sister group to all seed plants, yet little is known about their genomes other than that they are generally colossal. Here, we report on the genomes of Azolla filiculoidesand Salvinia cucullata(Salviniales) and present evidence for episodic whole-genome duplication in ferns—one at the base of ‘core leptosporangiates’ and one specific to Azolla. One fern-specific gene that we identified, recently shown to confer high insect resistance, seems to have been derived from bacteria through horizontal gene transfer. Azollacoexists in a unique symbiosis with N2-fixing cyanobacteria, and we demonstrate a clear pattern of cospeciation between the two partners. Furthermore, the Azollagenome lacks genes that are common to arbuscular mycorrhizal and root nodule symbioses, and we identify several putative transporter genes specific to Azolla–cyanobacterial symbiosis. These genomic resources will help in exploring the biotechnological potential of Azollaand address fundamental questions in the evolution of plant life.