American Journal of Botany, Год журнала: 2017, Номер 104(11), С. 1597 - 1599
Опубликована: Ноя. 1, 2017
For over a hundred years, botanists and biogeographers have noticed an interesting pattern: the occurrence of same plant species or very close relatives on either side tropics in North America (NA) South (SA) (Gray Hooker, 1880; Bray, 1898, 1900; Johnston, 1940; Constance, 1963; Raven, Cruden, 1966; Solbrig, 1972; Thorne, Carlquist, 1983; Wen Ickert-Bond, 2009). This biogeographic pattern, known as American amphitropical disjunction AAD (to be distinguished from European–African disjunction), represents repeated formation America–South sister lineages through dispersal subsequent diversification separate continents. General features this been examined by Raven (1963) Ickert-Bond (2009), who tabulated examples described overall trends with respect to natural history those taxa exhibiting disjunction. is also feature emphasized taxonomic phylogenetic research specific groups. Compared number events, comparatively few studies investigated even fewer looked closely at character evolution processes involved post dispersal. The time ripe for collection focusing groups that show distribution pattern eventual synthesis patterns exhibited. field systematics now has phylogenetic, biogeographic, dating tools assess evolutionary organisms begin relating these common mechanisms dispersal, climatic shifts, geologic events. We are pleased introduce special issue Journal Botany 12 contributions pertaining processes. hope articles will act catalyst accelerate topic, serving interface fields biogeography. begins new compilation all instances vascular plants exhibit (Simpson et al., 2017, issue). As preamble, definition discussed, recognition some current distributions human-mediated. To date, 237 literature. bioregions (bipolar, desert, temperate) resulting events listed. New allow us add growing list clades result following divergence event. Dating inferring direction change (whether NA SA NA) allowed trace greater precision than available past. Here, we use updated information evaluate several aspects evolution. numerous disjuncts not often go unrecognized unappreciated botanical community. Two give up-to-date mosses (Lewis issue) lichens (Garrido-Benavent Pérez-Ortega, Lewis al. extensive molecular data address members previously identified lineage within moss genus Tetraplodon. authors infer population most related disjunct populations. Garrido-Benavent Pérez-Ortega summarize literature bipolar lichen-forming fungi their photobionts provide checklist shared between regions high latitudes both hemispheres. These consider unique biology recent discuss mode, timing, genetic signatures well prospects future research. great bulk involves plants. Several span diverse array having biological phenomena associated history. Few ferns pattern. Farrar Stensvold (2017, concentrate fern Botrychium (Ophioglossaceae), providing evidence only single updating our understanding taxonomy group based morphological, genetic, reproductive data. enumerate other AADs review spore-bearing long-distance transport establishment novel environment. One article focuses taxa, found high-latitude two Villaverde (2017a, generally. bipolarity context plants, including outside Americas. Evidence mechanism evaluated, intrinsic extrinsic factors colonization areas. Finally, directions times considering impact past geological Other desert temperate various families. Drew present analyses subtribe Menthinae Lamiaceae. identify three group, each diversifying into multispecies clades. They directionality, possible attaining Frost family Verbenaceae, citing Based ancestral area reconstructions, arid-zone Verbenaceae derived Central ancestors via Andean migration corridors, situ desert-adapted species. Guilliams phylogeographic Amsinckiinae Boraginaceae, reporting 18 nearly directionality. Due relatively large study they able temporal patterns. interpret finding strong asynchrony timing inferred supporting continuous, low-probability phenomenon such birds likely group. Johnson Porter cases Polemoniaceae combined select illustrate fates postdispersal. Their include postdispersal relative stasis, divergence/speciation, hybridization, allopolyploidization, extirpation. cleistogamy, self-incompatibility, annual habit may occurred lineages. Species nine genera independently dispersed, yet cladogenesis rare. Schneider Moore parallel development holoparasitic (Aphyllon, Orobanchaceae) one its hosts (Grindelia, Asteraceae). Using DNA sequence data, time-calibrated phylogenies holoparasite host In case Aphyllon, which lacks fossils primary calibration, implement secondary calibration scheme using dated horizontal gene transfer Biogeographic analysis reveals Grindelia colonized event then diversified extensively. Aphyllon parasitizes occurring after genus. papers focus habitat adaptations respectively. Schenk Saunders accumulated modes diaspore (propagule) size structure, habit, habitat, distribution, units. type dispersing probable mode (2017b, ecological niche shift five Carex distribution. herbarium records 19 bioclimatic variables, differences potential changes predicted climate change. Additional further improve arisen. Basic research, especially detailed nomenclatural revision, needed resolve ambiguities, application names. Many lack analyses, others analyzed require sampling populations Relatively included estimation events—only 72 (30%) recognized calculated published data). should ideally fossil but information. Acquisition additional chromosome counts, increase shifts ploidy level descendants. biology, self-compatibility, permit better role facilitating establishment, fate setting. Studies showing net rates source recipient number. And aware compared substrate preference (See Simpson references.) Research avenues studies, investigating correspondence ecoregions microhabitats sink taxa. modeling yield can occur Evolutionary developmental phylogenomics illuminate underlying conditions continent generalizable disjunctions well. pique interest many studying facilitate continued AADs, established Amphitropical Disjunction Working Group website (https://figshare.com/projects/American_Amphitropical_Disjunctions_AAD_Working_Group/25510) foster collaboration continuous (e.g., http://dx.doi.org/10.6084/m9.figshare.5479822)
Язык: Английский
Процитировано
7Molecular phylogenetics ofEuploca(Boraginaceae): homoplasy in many characters, including the C4 photosynthetic pathway
Botanical Journal of the Linnean Society, Год журнала: 2021, Номер 199(2), С. 497 - 537
Опубликована: Окт. 11, 2021
Abstract We present a phylogenetic analysis using plastid (matK, rbcL) and nuclear (nrITS) DNA for diverse Euploca spp. (formerly Heliotropium section Orthostachys) from the worldwide distribution of genus including species encompassing wide physiological morphological diversity genus. Our results indicate that some remarkably complex features arose multiple times in parallel Euploca, attributes its subsections under Orthostachys, notably plants that, above ground, consist almost entirely inflorescences. To elucidate greater detail C4 s.s., we made > 800 δ 13C determinations, traditional Tournefortia. greatly increase number proven but found none outside Euploca. Of tested spp., c. 28% are C3 or intermediate carbon fixation pathway. four parallel/convergent acquisitions photosynthesis fewer origins with subsequent loss species.
Язык: Английский
Процитировано
6Research in Boraginaceae: A new variety of Cryptantha maritima, Cryptantha pondii resurrected, and Johnstonella echinosepala transferred back to Cryptantha
Phytotaxa, Год журнала: 2021, Номер 509(2)
Опубликована: Июнь 29, 2021
A review of the species Cryptantha maritima (Boraginaceae) supports continued recognition three varieties, these differing in corolla size, ovule and nutlet number, calyx vestiture. Mapping taxa from verified specimens demonstrates some geographic trends, but also overlap ranges. In process our study, we discovered a new taxonomic entity. var. vizcainensis is described as new. This variety restricted to Vizcaíno Desert Baja California Sur, Mexico should be considered rare, it known date only eleven collections. It differs other varieties having canescent, appressed-strigose stem vestiture lacking spreading trichomes, relatively large corolla, fruit derived two 1-ovuled ovary lobes, developing into heteromorphic nutlets. We that pondii, previously treated synonym C. patula, resurrected distinct taxon. pondii western Natividad Island Sur. morphologically distinctive bracteate flowers, corollas, four smooth nutlets by size. collections extremely rare. reviewed morphological phylogenetic status Johnstonella echinosepala. taxon shows similarities exhibits discontinuity between Pacific Gulf populations Evidence both studies transfer this genus back Cryptantha. Finally, propose echinosepala are likely close relatives maritima, all “Maritimae clade,” group distantly related main core study confirms great importance studying herbarium research.
Язык: Английский
Процитировано
3Chromosome-scale reference genome of Pectocarya recurvata, a species with one of the smallest genome sizes in Boraginaceae
bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown
Опубликована: Окт. 17, 2024
ABSTRACT Premise Pectocarya recurvata (Boraginaceae), a native species of the Sonoran Desert, has served as an important model system for suite ecological and evolutionary studies. Despite its relevance eco-evolutionary model, no reference genome assemblies in Cynoglossoideae subfamily have been published. Methods Using PacBio HiFi sequencing, we assembled P. annotated coding regions with full-length transcripts from Iso-Seq transcriptome library. We assessed completeness BUSCO used flow cytometry K-mer analysis to estimate size . Results The chromosome-scale assembly was 216.0 Mbp long contig N50 12.1 Mbp. Our included 12 primary contigs bounded by telomeres at all ends but one, consistent chromosomes documented species. covered 158.3 contained 30,655 predicted genes. measured haploid same population 386.5 Mbp, among smallest Boraginaceae. Genomic analyses suggested that this may reflect recent autotetraploid, such diploid would be even smaller similar size. Discussion annotation provide high-quality genomic resource sparsely represented area Angiosperm phylogeny. new will enable future ecophysiology, biogeography, phylogenetics research.
Язык: Английский
Процитировано
0Cryptantha acrimuricata (Boraginaceae), a distinctive new taxon of series Muricatae
PhytoKeys, Год журнала: 2024, Номер 250, С. 193 - 213
Опубликована: Дек. 30, 2024
In the process of studying species Cryptantha muricata and its varieties, we discovered a unique taxon genus that resembles C. but differs in having mostly densely white-strigose stem vestiture (sometimes with spreading trichomes) tuberculate to muricate nutlets often whitish tubercles are, comparison typical , larger, wider base more pointed apex, spaced. We believe this form be different enough describe as new species, acrimuricata . This occurs southwestern North America: California Arizona United States northern Baja California, Mexico. It mid- relatively high elevation mountain regions desert transition/escarpment Transverse Peninsular Ranges, Sonoran Mohave Deserts, some populations scattered southern Sierra Nevada. closely related clokeyi martirensis possibly hooveri series Muricatae Detailed molecular phylogenetic are needed better establish their interrelationships.
Язык: Английский
Процитировано
0NOTEWORTHY COLLECTIONS
Madroño, Год журнала: 2020, Номер 67(1), С. 5 - 5
Опубликована: Апрель 20, 2020
Язык: Английский
Процитировано
2Johnstonella punensis (Boraginaceae), a new species endemic to the dry Puna of Chile
PhytoKeys, Год журнала: 2022, Номер 197, С. 149 - 164
Опубликована: Май 30, 2022
In an earlier molecular phylogenetic study, a sample of what was originally identified as Cryptanthahispida (Boraginaceae) from Chile, grouped with species the genus Johnstonella. This subsequently shown not to be C.hispida, but undescribed species, endemic dry Puna Chile. new is described here Johnstonellapunensis, along key all South American genus. Johnstonellapunensis resembles other members that in having ovate fruit shape, nutlets and long style extends beyond nutlets. It unusual non-tuberculate, dimpled rugulose nutlet surface sculpturing. Its closest relative within likely J.diplotricha.ResumenEn un estudio filogenético anterior, una muestra que originalmente se identificó como de Chile agrupaba con especies del género Posteriormente demostró esta no era C.hispida sino especie descrita, endémica la seca Esta nueva describe aquí junto clave para todas las sudamericanas género. parece otros miembros por tener fruto forma ovadа, clusas ovadas y estilo largo sobrepasa clusas. Es inusual en el clusa tenga superficie tuberculada, rugulosa formando hoyuelos. Su pariente más cercano dentro es probablemente sudamericana J.diplotricha.
Язык: Английский
Процитировано
1Tipificaciones de nombres ligados a Phacelia (Hydrophyllaceae) para la Flora Argentina
Darwiniana nueva serie, Год журнала: 2021, Номер 9(1), С. 209 - 216
Опубликована: Янв. 1, 2021
During the preparation of treatment genus Phacelia for Flora Argentina project, several names were found in need typification. In this context lectotypes are designated 17 names: Aldea pinnata, Eutoca frigida, E. litoralis, lomarifolia, pinnatifida, pusilla, Hydrophyllum magellanicum, boliviana, P. foliosa, magellanica fo. amoena, plantaginea, nana, pinnatifida var. elatior, sanzinii, sinuata and viscosa.
Язык: Английский
Процитировано
1Nomenclatural revision of Cryptantha (Boraginaceae s. str.) names linked to South American taxa
PhytoKeys, Год журнала: 2021, Номер 181, С. 29 - 47
Опубликована: Авг. 30, 2021
During the preparation of treatment genus Cryptantha Lehmann ex G. Don for South America, numerous names were identified as needing typification to stabilize their nomenclature. As a result, lectotypes are designated 11 and second-step 20 names. Furthermore, supporting information about type material basionyms four already typified by Johnston ( Eritrichium talquinum Phil., dimorphum carrizalense subamplexicaule Phil.) is provided.
Язык: Английский
Процитировано
1DISTYLY IN OREOCARYA CRASSIPES (BORAGINACEAE), AN ENDANGERED PLANT SPECIES
The Southwestern Naturalist, Год журнала: 2021, Номер 65(2)
Опубликована: Авг. 31, 2021
Oreocarya crassipes, an endangered angiosperm native to the Trans-Pecos region in southern Brewster County, Texas, exhibits distyly, a breeding system that includes two floral morphs with reciprocal positioning of anthers and stigmas. The long-style (LS) morph has stigmas above anthers, short-style (SS) produces In present study, multiple aspects distyly were examined across four populations O. crassipes including ratios, variation morphology, patterns macroscopic microscopic development morphs. Morph ratios vary among populations, but for all samples pooled ratio was 1 LS:1 SS. Distyly observed be well established species, stigma height, anther stigma-anther separation significantly different between Floral developmental are similar those related suggesting conserved similarly co-opted pathway origin genus relatives.
Язык: Английский
Процитировано
0