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dc.contributor.authorLiu, Jian-Wei
dc.contributor.authorHuang, Chun-Lin
dc.contributor.authorValdespino, Iván A.
dc.contributor.authorHo, Jia-Fang
dc.contributor.authorLee, Tzu-Yun
dc.contributor.authorChesson, Peter
dc.contributor.authorSheue, Chiou-Rong
dc.date.accessioned2022-01-13T02:31:04Z
dc.date.available2022-01-13T02:31:04Z
dc.date.issued2022-01
dc.identifier.citationLiu, J.-W., Huang, C.-L., Valdespino, I. A., Ho, J.-F., Lee, T.-Y., Chesson, P., & Sheue, C.-R. (2022). Morphological and phylogenetic evidence that the novel leaf structures of multivein Selaginella schaffneri are derived traits. Flora: Morphology, Distribution, Functional Ecology of Plants.en_US
dc.identifier.issn0367-2530
dc.identifier.doi10.1016/j.flora.2021.151976
dc.identifier.urihttp://hdl.handle.net/10150/662882
dc.description.abstractMicrophylls, simple leaves with a single vein and no leaf gap, are the typical lycophyte leaves. However, Selaginella schaffneri has complex veins. Structural features and phylogeny associated with this unusual venation have remained unknown. We studied the leaf, venation, spore structures, and phylogeny of S. schaffneri, with S. erythropus as a typical Selaginella for comparison. Leaf veins of both S. schaffneri and S. erythropus originate from a single vascular strand in the stem and have no leaf gaps. In S. schaffneri, this single vascular strand prominently enlarges as a hub-like vein node at the leaf base and then divides multiply in the leaf blade. Unusual structures, more commonly found in angiosperms, are revealed, including vessels, bundle sheath cells, three stomatal types, and differentiated mesophyll tissue. Other unusual structures include transparent zones on the leaf margin and a complex open hexagonal three-dimensional structure on the megaspore walls. Fifty one concatenated protein-coding genes from plastomes were used to construct the phylogeny of S. schaffneri within Selaginellaceae, which shows that S. schaffneri, together with the sanguinolenta group, is the earliest-diverging lineage of subgenus Stachygynandrum. The unusual structures of S. schaffneri are consistent with drought resistance. However, these structures are not known in more basal members of Selaginella and appear to be derived in S. schaffneri. The leaf veins of S. schaffneri, originating from the branching of a single vein, imply a variation on a microphyll. Despite the general simplicity of structure in Selaginella, S. schaffneri shows unusual structural homoplasy with angiosperms in these traits.en_US
dc.description.sponsorshipMinistry of Science and Technology, Taiwanen_US
dc.language.isoenen_US
dc.publisherElsevier BVen_US
dc.rights© 2021 Elsevier GmbH. All rights reserved.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en_US
dc.subjectBundle sheath cellen_US
dc.subjectDrought adaptationen_US
dc.subjectSelaginellaceaeen_US
dc.subjectSporeen_US
dc.subjectVeinen_US
dc.subjectVesselen_US
dc.titleMorphological and phylogenetic evidence that the novel leaf structures of multivein Selaginella schaffneri are derived traitsen_US
dc.typeArticleen_US
dc.contributor.departmentDepartment of Ecology and Evolutionary Biology, University of Arizonaen_US
dc.identifier.journalFlora: Morphology, Distribution, Functional Ecology of Plantsen_US
dc.description.note12 month embargo; available online: 25 November 2021en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.identifier.piiS0367253021002152
dc.source.journaltitleFlora
dc.source.volume286
dc.source.beginpage151976


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