scholarly journals Simultaneous parsimony jackknife analysis of 2538rbcL DNA sequences reveals support for major clades of green plants, land plants, seed plants and flowering plants

1998 ◽  
Vol 213 (3-4) ◽  
pp. 259-287 ◽  
Author(s):  
Mari K�llersj� ◽  
James S. Farris ◽  
Mark W. Chase ◽  
Birgitta Bremer ◽  
Michael F. Fay ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Flowering Plants ◽  
Land Plants ◽  
Seed Plants ◽  
Green Plants ◽  
Jackknife Analysis

scholarly journals Counting counts: revised estimates of numbers of accepted species of flowering plants, seed plants, vascular plants and land plants with a review of other recent estimates

Phytotaxa ◽  
2016 ◽  
Vol 272 (1) ◽  
pp. 82 ◽  
Author(s):  
EIMEAR NIC LUGHADHA ◽  
RAFAËL GOVAERTS ◽  
IRINA BELYAEVA ◽  
NICHOLAS BLACK ◽  
HEATHER LINDON ◽  
...  
Keyword(s):  
Vascular Plants ◽  
Flowering Plants ◽  
Land Plants ◽  
Seed Plants ◽  
Seed Plant ◽  
Plant Names ◽  
The World ◽  
Alternative Approaches ◽  
Plant Families ◽  
International Plant

We present revised estimates of the numbers of accepted species of flowering plants (369,434), seed plants (370,492), vascular plants (383,671) and land plants (403,911) based on a recently de-duplicated version of the International Plant Names Index and rates of synonymy calculated from the seed plant families published in the World checklist of selected plant families. Alternative approaches to estimating or calculating the number of accepted plant species are discussed and differences between results are highlighted and interpreted.

scholarly journals Sequencing of small RNAs of the fern Pleopeltis minima (Polypodiaceae) offers insight into the evolution of the microRNA repertoire in land plants

2016 ◽  
Author(s):  
Florencia Berruezo ◽  
Flavio S. J. de Souza ◽  
Pablo I. Picca ◽  
Sergio I. Nemirovsky ◽  
Leandro Martinez-Tosar ◽  
...  
Keyword(s):  
Small Rna ◽  
Land Plant ◽  
Land Plants ◽  
Phylogenetic Position ◽  
Seed Plants ◽  
Messenger Rnas ◽  
Rna Molecules ◽  
Functional Studies ◽  
Mirna Genes ◽  
Ecological Importance

AbstractMicroRNAs (miRNAs) are short, single stranded RNA molecules that regulate the stability and translation of messenger RNAs in diverse eukaryotic groups. Several miRNA genes are of ancient origin and have been maintained in the genomes of animal and plant taxa for hundreds of millions of years, and functional studies indicate that ancient miRNAs play key roles in development and physiology. In the last decade, genome and small RNA (sRNA) sequencing of several plant species have helped unveil the evolutionary history of land plant miRNAs. Land plants are divided into bryophytes (liverworts, mosses), lycopods (clubmosses and spikemosses), monilophytes (ferns and horsetails), gymnosperms (cycads, conifers and allies) and angiosperms (flowering plants). Among these, the fern group occupies a key phylogenetic position, since it represents the closest extant cousin taxon of seed plants, i.e. gymno- and angiosperms. However, in spite of their evolutionary, economic and ecological importance, no fern genome has been sequenced yet and few genomic resources are available for this group. Here, we sequenced the small RNA fraction of an epiphytic South American fern, Pleopeltis minima (Polypodiaceae), and compared it to plant miRNA databases, allowing for the identification of miRNA families that are shared by all land plants, shared by all vascular plants (tracheophytes) or shared by euphyllophytes (ferns and seed plants) only. Using the recently described transcriptome of another fern, Lygodium japonicum, we also estimated the degree of conservation of fern miRNA targets in relation to other plant groups. Our results pinpoint the origin of several miRNA families in the land plant evolutionary tree with more precision and are a resource for future genomic and functional studies of fern miRNAs.

Checklist of ferns and seed plants of the Golden Gate Highlands National Park, South Africa

Bothalia ◽  
2010 ◽  
Vol 40 (2) ◽  
pp. 205-218 ◽  
Author(s):  
M. E. Daemane ◽  
B-E. Van Wyk ◽  
A. Moteetee
Keyword(s):  
South Africa ◽  
National Park ◽  
Flowering Plants ◽  
Seed Plants ◽  
Golden Gate ◽  
Infraspecific Taxa

A list of flowering plants and ferns has been compiled for the Golden Gate Highlands National Park, which occupies an area of 11 346 hectares but excludes the adjacent QwaQwa National Park. The checklist comprises 846 taxa (823 species and 23 infraspecific taxa) representing 359 genera in 101 families. Eleven of the species are recorded in the Red Data List (Raimondo et al. 2010) and 64 species are naturalized exotics.

scholarly journals A fern WUSCHEL-RELATED HOMEOBOX gene functions in both gametophyte and sporophyte generations

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Christopher E. Youngstrom ◽  
Lander F. Geadelmann ◽  
Erin E. Irish ◽  
Chi-Lien Cheng
Keyword(s):  
Stem Cells ◽  
Lateral Roots ◽  
Homeobox Gene ◽  
Genetic Networks ◽  
Land Plants ◽  
Seed Plants ◽  
Wild Type ◽  
Cell Fates ◽  
Cell Divisions ◽  
Gene Functions

Abstract Background Post-embryonic growth of land plants originates from meristems. Genetic networks in meristems maintain the stem cells and direct acquisition of cell fates. WUSCHEL-RELATED HOMEOBOX (WOX) transcription factors involved in meristem networks have only been functionally characterized in two evolutionarily distant taxa, mosses and seed plants. This report characterizes a WOX gene in a fern, which is located phylogenetically between the two taxa. Results CrWOXB transcripts were detected in proliferating tissues, including gametophyte and sporophyte meristems of Ceratopteris richardii. In addition, CrWOXB is expressed in archegonia but not the antheridia of gametophytes. Suppression of CrWOXB expression in wild-type RN3 plants by RNAi produced abnormal morphologies of gametophytes and sporophytes. The gametophytes of RNAi lines produced fewer cells, and fewer female gametes compared to wild-type. In the sporophyte generation, RNAi lines produced fewer leaves, pinnae, roots and lateral roots compared to wild-type sporophytes. Conclusions Our results suggest that CrWOXB functions to promote cell divisions and organ development in the gametophyte and sporophyte generations, respectively. CrWOXB is the first intermediate-clade WOX gene shown to function in both generations in land plants.

scholarly journals Introduction: the essential role of the Pteridophyta in the study of land plants

1985 ◽  
Vol 86 ◽  
pp. 1-4
Author(s):  
P. R. Bell
Keyword(s):  
Essential Role ◽  
Flowering Plants ◽  
Land Plants ◽  
Useful Knowledge

SynopsisArguments based on their technical advantages, undoubted antiquity and lack of evolutionary extravagances are advanced for promoting the study of the Pteridophyta. Sound interpretations of fundamental aspects of the land plants, together with useful knowledge, are likely to follow, and grievous errors arising from too great a concentration on the flowering plants can be avoided.

scholarly journals Terrestrial-type nitrogen-fixing symbiosis between seagrass and a marine bacterium

Nature ◽  
2021 ◽  
Author(s):  
Wiebke Mohr ◽  
Nadine Lehnen ◽  
Soeren Ahmerkamp ◽  
Hannah K. Marchant ◽  
Jon S. Graf ◽  
...  
Keyword(s):  
Amino Acids ◽  
Marine Bacterium ◽  
Posidonia Oceanica ◽  
Flowering Plants ◽  
Land Plants ◽  
Seagrass Meadows ◽  
Marine Habitats ◽  
Intimate Association ◽  
Related Plant ◽  
Early Land

AbstractSymbiotic N2-fixing microorganisms have a crucial role in the assimilation of nitrogen by eukaryotes in nitrogen-limited environments1–3. Particularly among land plants, N2-fixing symbionts occur in a variety of distantly related plant lineages and often involve an intimate association between host and symbiont2,4. Descriptions of such intimate symbioses are lacking for seagrasses, which evolved around 100 million years ago from terrestrial flowering plants that migrated back to the sea5. Here we describe an N2-fixing symbiont, ‘Candidatus Celerinatantimonas neptuna’, that lives inside seagrass root tissue, where it provides ammonia and amino acids to its host in exchange for sugars. As such, this symbiosis is reminiscent of terrestrial N2-fixing plant symbioses. The symbiosis between Ca. C. neptuna and its host Posidonia oceanica enables highly productive seagrass meadows to thrive in the nitrogen-limited Mediterranean Sea. Relatives of Ca. C. neptuna occur worldwide in coastal ecosystems, in which they may form similar symbioses with other seagrasses and saltmarsh plants. Just like N2-fixing microorganisms might have aided the colonization of nitrogen-poor soils by early land plants6, the ancestors of Ca. C. neptuna and its relatives probably enabled flowering plants to invade nitrogen-poor marine habitats, where they formed extremely efficient blue carbon ecosystems7.

scholarly journals Transposable element landscapes illuminate past evolutionary events in the endangered fern Vandenboschia speciosa

Genome ◽  
2021 ◽  
Author(s):  
Francisco J. Ruiz-Ruano ◽  
Beatriz Navarro-Domínguez ◽  
J P M Camacho ◽  
Manuel Angel Garrido-Ramos
Keyword(s):  
Transposable Element ◽  
Dna Sequences ◽  
Seed Plants ◽  
Sequence Variants ◽  
Ltr Retrotransposons ◽  
Past Climate ◽  
Large Genome ◽  
Blast Search ◽  
Relict Populations ◽  
Fern Species

Vandenboschia speciosa is an endangered tetraploid fern species with a large genome (10.5 Gb). Its geographical distribution is characterized by disjoined tertiary flora refuges, with relict populations that survived past climate crises. Here we analyze the transposable elements (TEs) and found that they comprise about 76% of the V. speciosa genome, thus being the most abundant kind of DNA sequences in this gigantic genome. V. speciosa genome is composed of 51% and 5.6% of Class I and Class II elements, respectively. LTR retrotransposons were the most abundant TEs in this species (at least 42% of the genome), followed by non-LTR retrotransposons that constituted at least 8.7% of the genome of this species. We introduce an additional analysis to identify the nature of non-annotated elements (19% of the genome). A BLAST search of the non-annotated contigs against the V. speciosa TE database allowed determining the identity of almost half of them, which were most likely diverged sequence variants of the annotated TEs. In general, TE composition in V. speciosa resembles TE composition in seed plants. In addition, repeat landscapes revealed three episodes of amplification for all TEs, most likely due to demographic changes associated to past climate crises.

scholarly journals Angiosperm phylogeny poster (APP) – Flowering plant systematics, 2017

2017 ◽  
Author(s):  
Theodor C H Cole ◽  
Hartmut H Hilger ◽  
Peter F Stevens
Keyword(s):  
Botanical Garden ◽  
Flowering Plants ◽  
Land Plants ◽  
Flowering Plant ◽  
Evolutionary Relationships ◽  
Plant Systematics ◽  
Educational Tool ◽  
Color Coding ◽  
Missouri Botanical ◽  
Angiosperm Phylogeny

The "Angiosperm Phylogeny Poster – Flowering Plant Systematics" is an educational tool presenting an overview of the evolutionary relationships among flowering plants according to APG IV and APweb as of 2016. The phylogenetic tree depicts the 64 orders and the majority of the 416 families, listing the main apomorphies and plesiomorphies as well as diagnostic and nondiagnostic anatomical, morphological, and phytochemical features for orders and higher levels within the tree. The intuitive color-coding facilitates memorization and teaching. Translations of the poster by internationally renown botanists are now available in 18 languages. Hyperlinks to APweb (Peter F. Stevens, Missouri Botanical Garden) are provided for the orders and higher ranks. This is one in a series of three educational posters on the phylogeny of land plants: Poster 1: "Angiosperms", Poster 2: "Tracheophytes: Lycophytes, Ferns, Gymnosperms", Poster 3: "Bryophytes: Liverworts, Mosses, Hornworts".

scholarly journals Cross-kingdom signalling regulates spore germination in the moss Physcomitrella patens

2019 ◽  
Author(s):  
Eleanor F. Vesty ◽  
Amy L. Whitbread ◽  
Sarah Needs ◽  
Wesal Tanko ◽  
Kirsty Jones ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Spore Germination ◽  
Growth And Development ◽  
Marine Algae ◽  
Physcomitrella Patens ◽  
Close Association ◽  
Flowering Plants ◽  
Land Plants ◽  
Gram Negative Bacteria ◽  
Gram Negative

ABSTRACTPlants live in close association with microorganisms that can have beneficial or detrimental effects. The activity of bacteria in association with flowering plants has been extensively analysed. Bacteria use quorum-sensing as a way of monitoring their population density and interacting with their environment. A key group of quorum sensing molecules in Gram-negative bacteria are the N-acylhomoserine lactones (AHLs), which are known to affect the growth and development of both flowering plants, including crops, and marine algae. Thus, AHLs have potentially important roles in agriculture and aquaculture. Nothing is known about the effects of AHLs on the earliest-diverging land plants, thus the evolution of AHL-mediated bacterial-plant- and algal interactions is unknown. In this paper, we show that AHLs can affect spore germination in a representative of the earliest plants on land, the Bryophyte moss Physcomitrella patens. Furthermore, we demonstrate that sporophytes of wild isolates of Physcomitrella patens are associated with AHL-producing bacteria.

scholarly journals Microbial-type terpene synthase genes occur widely in nonseed land plants, but not in seed plants

2016 ◽  
Vol 113 (43) ◽  
pp. 12328-12333 ◽  
Author(s):  
Qidong Jia ◽  
Guanglin Li ◽  
Tobias G. Köllner ◽  
Jianyu Fu ◽  
Xinlu Chen ◽  
...  
Keyword(s):  
Flowering Plants ◽  
Terpene Synthase ◽  
Seed Plants ◽  
Terpene Synthases ◽  
The Third ◽  
Wide Range ◽  
Prenyl Diphosphate ◽  
Bacteria And Fungi ◽  
Selaginella Moellendorffii ◽  
Catalytic Functions

The vast abundance of terpene natural products in nature is due to enzymes known as terpene synthases (TPSs) that convert acyclic prenyl diphosphate precursors into a multitude of cyclic and acyclic carbon skeletons. Yet the evolution of TPSs is not well understood at higher levels of classification. Microbial TPSs from bacteria and fungi are only distantly related to typical plant TPSs, whereas genes similar to microbial TPS genes have been recently identified in the lycophyte Selaginella moellendorffii. The goal of this study was to investigate the distribution, evolution, and biochemical functions of microbial terpene synthase-like (MTPSL) genes in other plants. By analyzing the transcriptomes of 1,103 plant species ranging from green algae to flowering plants, putative MTPSL genes were identified predominantly from nonseed plants, including liverworts, mosses, hornworts, lycophytes, and monilophytes. Directed searching for MTPSL genes in the sequenced genomes of a wide range of seed plants confirmed their general absence in this group. Among themselves, MTPSL proteins from nonseed plants form four major groups, with two of these more closely related to bacterial TPSs and the other two to fungal TPSs. Two of the four groups contain a canonical aspartate-rich “DDxxD” motif. The third group has a “DDxxxD” motif, and the fourth group has only the first two “DD” conserved in this motif. Upon heterologous expression, representative members from each of the four groups displayed diverse catalytic functions as monoterpene and sesquiterpene synthases, suggesting these are important for terpene formation in nonseed plants.

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