Base de dados : MEDLINE
Pesquisa : B01.650.940.800.150 [Categoria DeCS]
Referências encontradas : 29 [refinar]
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  1 / 29 MEDLINE  
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[PMID]:27178434
[Au] Autor:Herburger K; Remias D; Holzinger A
[Ad] Endereço:Institute of Botany, Functional Plant Biology, University of Innsbruck, Sternwartestraße 15, A-6020 Innsbruck, Austria.
[Ti] Título:The green alga Zygogonium ericetorum (Zygnematophyceae, Charophyta) shows high iron and aluminium tolerance: protection mechanisms and photosynthetic performance.
[So] Source:FEMS Microbiol Ecol;92(8), 2016 08.
[Is] ISSN:1574-6941
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Streptophyte green algae, ancestors of Embryophytes, occur frequently in terrestrial habitats being exposed to high light intensities, water scarcity and potentially toxic metal cations under acidic conditions. The filamentous Zygogonium ericetorum synthesizes a purple vacuolar ferrous pigment, which is lost after aplanospore formation. However, it is unknown whether this cellular reorganization also removes excessive iron from the protoplast and how Z. ericetorum copes with high concentrations of aluminium. Here we show that aplanospore formation shifts iron into the extracellular space of the algal filament. Upon germination of aplanospores, aluminium is bound in the parental cell wall. Both processes reduce iron and aluminium in unpigmented filaments. Comparison of the photosynthetic oxygen production in response to light and temperature gradients in two different Z. ericetorum strains from an Austrian alpine and a Scottish highland habitat revealed lower values in the latter strain. In contrast, the Scottish strain showed a higher optimum quantum yield of PSII during desiccation stress followed by rehydration. Furthermore, pigmented filaments of both strains exhibited a higher light and temperature dependent oxygen production when compared to the unpigmented phenotype. Our results demonstrate a high metal tolerance of Z. ericetorum, which is crucial for surviving in acidic terrestrial habitats.
[Mh] Termos MeSH primário: Adaptação Fisiológica/fisiologia
Carofíceas/fisiologia
Fotossíntese/fisiologia
[Mh] Termos MeSH secundário: Alumínio/metabolismo
Alumínio/toxicidade
Áustria
Clorófitas/metabolismo
Clorófitas/fisiologia
Dessecação
Ecossistema
Ferro/metabolismo
Ferro/toxicidade
Luz
Oxigênio/metabolismo
Fotossíntese/efeitos dos fármacos
Temperatura Ambiente
Água/metabolismo
Poluentes Químicos da Água/metabolismo
Poluentes Químicos da Água/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 059QF0KO0R (Water); CPD4NFA903 (Aluminum); E1UOL152H7 (Iron); S88TT14065 (Oxygen)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171122
[Lr] Data última revisão:
171122
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160515
[St] Status:MEDLINE


  2 / 29 MEDLINE  
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[PMID]:26869733
[Au] Autor:Stancheva R; Herburger K; Sheath RG; Holzinger A
[Ti] Título:Conjugation morphology of Zygogonium ericetorum (Zygnematophyceae, Charophyta) from a high alpine habitat.
[So] Source:J Phycol;52(1):131-4, 2016 Feb.
[Is] ISSN:1529-8817
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Reproductive characteristics are important for defining taxonomic groups of filamentous Zygnematophyceae, but they have not been fully observed in the genus Zygogonium. Specimens of Z. ericetorum previously studied and used to clarify the generic concept lacked fertile material, which was obtained recently. This study illustrates for the first time, using color light microscopic and fluorescence images, a consequent conjugation stage in Z. ericetorum, including completely developed zygospores and purple cytoplasmic residue content left outside the zygospores, similar to aplanospore formation. Structures confirmed earlier reports and provided new observation informative regarding phylogenetically relevant reproductive characters of Z. ericetorum.
[Mh] Termos MeSH primário: Carofíceas/fisiologia
Conjugação Genética
[Mh] Termos MeSH secundário: Áustria
Ecossistema
Células Germinativas Vegetais/fisiologia
Microscopia de Fluorescência
Reprodução/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1701
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160213
[St] Status:MEDLINE


  3 / 29 MEDLINE  
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[PMID]:26542289
[Au] Autor:Morozov SY; Milyutina IA; Bobrova VK; Ryazantsev DY; Erokhina TN; Zavriev SK; Agranovsky AA; Solovyev AG; Troitsky AV
[Ad] Endereço:Department of Virology, Biological Faculty, Lomonosov Moscow State University, Moscow 119992, Russia; A. N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia. Electronic address: morozov@genebee.msu.su.
[Ti] Título:Structural evolution of the 4/1 genes and proteins in non-vascular and lower vascular plants.
[So] Source:Biochimie;119:125-36, 2015 Dec.
[Is] ISSN:1638-6183
[Cp] País de publicação:France
[La] Idioma:eng
[Ab] Resumo:The 4/1 protein of unknown function is encoded by a single-copy gene in most higher plants. The 4/1 protein of Nicotiana tabacum (Nt-4/1 protein) has been shown to be alpha-helical and predominantly expressed in conductive tissues. Here, we report the analysis of 4/1 genes and the encoded proteins of lower land plants. Sequences of a number of 4/1 genes from liverworts, lycophytes, ferns and gymnosperms were determined and analyzed together with sequences available in databases. Most of the vascular plants were found to encode Magnoliophyta-like 4/1 proteins exhibiting previously described gene structure and protein properties. Identification of the 4/1-like proteins in hornworts, liverworts and charophyte algae (sister lineage to all land plants) but not in mosses suggests that 4/1 proteins are likely important for plant development but not required for a primary metabolic function of plant cell.
[Mh] Termos MeSH primário: Evolução Molecular
Genes de Plantas
Modelos Genéticos
Proteínas de Plantas/genética
Viridiplantae/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Sequência de Bases
Briófitas/genética
Briófitas/metabolismo
Carofíceas/genética
Carofíceas/metabolismo
Biologia Computacional
Sequência Conservada
Cycadopsida/genética
Cycadopsida/metabolismo
Bases de Dados Genéticas
Biblioteca Genômica
Magnoliopsida/genética
Magnoliopsida/metabolismo
Dados de Sequência Molecular
Filogenia
Desenvolvimento Vegetal
Proteínas de Plantas/química
Proteínas de Plantas/metabolismo
Conformação Proteica
Alinhamento de Sequência
Viridiplantae/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Plant Proteins)
[Em] Mês de entrada:1612
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151107
[St] Status:MEDLINE


  4 / 29 MEDLINE  
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[PMID]:26439353
[Au] Autor:Delwiche CF; Cooper ED
[Ad] Endereço:Cell Biology and Molecular Genetics and the Maryland Agricultural Experiment Station, University of Maryland, College Park, MD 20742, USA. Electronic address: Delwiche@umd.edu.
[Ti] Título:The Evolutionary Origin of a Terrestrial Flora.
[So] Source:Curr Biol;25(19):R899-910, 2015 Oct 05.
[Is] ISSN:1879-0445
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Life on Earth as we know it would not be possible without the evolution of plants, and without the transition of plants to live on land. Land plants (also known as embryophytes) are a monophyletic lineage embedded within the green algae. Green algae as a whole are among the oldest eukaryotic lineages documented in the fossil record, and are well over a billion years old, while land plants are about 450-500 million years old. Much of green algal diversification took place before the origin of land plants, and the land plants are unambiguously members of a strictly freshwater lineage, the charophyte green algae. Contrary to single-gene and morphological analyses, genome-scale phylogenetic analyses indicate the sister taxon of land plants to be the Zygnematophyceae, a group of mostly unbranched filamentous or single-celled organisms. Indeed, several charophyte green algae have historically been used as model systems for certain problems, but often without a recognition of the specific phylogenetic relationships among land plants and (other) charophyte green algae. Insight into the phylogenetic and genomic properties of charophyte green algae opens up new opportunities to study key properties of land plants in closely related model. This review will outline the transition from single-celled algae to modern-day land plants, and will highlight the bright promise studying the charophyte green algae holds for better understanding plant evolution.
[Mh] Termos MeSH primário: Evolução Biológica
Carofíceas/classificação
Embriófitas/classificação
[Mh] Termos MeSH secundário: Carofíceas/anatomia & histologia
Carofíceas/genética
Embriófitas/anatomia & histologia
Embriófitas/genética
Evolução Molecular
Filogenia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.; REVIEW
[Em] Mês de entrada:1607
[Cu] Atualização por classe:151007
[Lr] Data última revisão:
151007
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151007
[St] Status:MEDLINE


  5 / 29 MEDLINE  
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[PMID]:26215968
[Au] Autor:Li FW; Melkonian M; Rothfels CJ; Villarreal JC; Stevenson DW; Graham SW; Wong GK; Pryer KM; Mathews S
[Ad] Endereço:Department of Biology, Duke University, Durham, North Carolina 27708, USA.
[Ti] Título:Phytochrome diversity in green plants and the origin of canonical plant phytochromes.
[So] Source:Nat Commun;6:7852, 2015 Jul 28.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Phytochromes are red/far-red photoreceptors that play essential roles in diverse plant morphogenetic and physiological responses to light. Despite their functional significance, phytochrome diversity and evolution across photosynthetic eukaryotes remain poorly understood. Using newly available transcriptomic and genomic data we show that canonical plant phytochromes originated in a common ancestor of streptophytes (charophyte algae and land plants). Phytochromes in charophyte algae are structurally diverse, including canonical and non-canonical forms, whereas in land plants, phytochrome structure is highly conserved. Liverworts, hornworts and Selaginella apparently possess a single phytochrome, whereas independent gene duplications occurred within mosses, lycopods, ferns and seed plants, leading to diverse phytochrome families in these clades. Surprisingly, the phytochrome portions of algal and land plant neochromes, a chimera of phytochrome and phototropin, appear to share a common origin. Our results reveal novel phytochrome clades and establish the basis for understanding phytochrome functional evolution in land plants and their algal relatives.
[Mh] Termos MeSH primário: Carofíceas/genética
Variação Genética
Fitocromo/genética
Viridiplantae/genética
[Mh] Termos MeSH secundário: Anthocerotophyta/genética
Sequência de Bases
Briófitas/genética
Evolução Molecular
Gleiquênias/genética
Hepatófitas/genética
Lycopodium/genética
Dados de Sequência Molecular
Selaginellaceae/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
11121-56-5 (Phytochrome)
[Em] Mês de entrada:1604
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150729
[St] Status:MEDLINE
[do] DOI:10.1038/ncomms8852


  6 / 29 MEDLINE  
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[PMID]:26113633
[Au] Autor:O'Rourke C; Gregson T; Murray L; Sadler IH; Fry SC
[Ad] Endereço:The Edinburgh Cell Wall Group, Institute of Molecular Plant Sciences, The University of Edinburgh, Daniel Rutherford Building, The King's Buildings, Max Born Crescent, Edinburgh EH9 3BF, UK and.
[Ti] Título:Sugar composition of the pectic polysaccharides of charophytes, the closest algal relatives of land-plants: presence of 3-O-methyl-D-galactose residues.
[So] Source:Ann Bot;116(2):225-36, 2015 Aug.
[Is] ISSN:1095-8290
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND AND AIMS: During evolution, plants have acquired and/or lost diverse sugar residues as cell-wall constituents. Of particular interest are primordial cell-wall features that existed, and in some cases abruptly changed, during the momentous step whereby land-plants arose from charophytic algal ancestors. METHODS: Polysaccharides were extracted from four charophyte orders [Chlorokybales (Chlorokybus atmophyticus), Klebsormidiales (Klebsormidium fluitans, K. subtile), Charales (Chara vulgaris, Nitella flexilis), Coleochaetales (Coleochaete scutata)] and an early-diverging land-plant (Anthoceros agrestis). 'Pectins' and 'hemicelluloses', operationally defined as extractable in oxalate (100 °C) and 6 m NaOH (37 °C), respectively, were acid- or Driselase-hydrolysed, and the monosaccharides analysed chromatographically. One unusual monosaccharide, 'U', was characterized by (1)H/(13)C-nuclear magnetic resonance spectroscopy and also enzymically. KEY RESULTS: 'U' was identified as 3-O-methyl-D-galactose (3-MeGal). All pectins, except in Klebsormidium, contained acid- and Driselase-releasable galacturonate, suggesting homogalacturonan. All pectins, without exception, released rhamnose and galactose on acid hydrolysis; however, only in 'higher' charophytes (Charales, Coleochaetales) and Anthoceros were these sugars also efficiently released by Driselase, suggesting rhamnogalacturonan-I. Pectins of 'higher' charophytes, especially Chara, contained little arabinose, instead possessing 3-MeGal. Anthoceros hemicelluloses were rich in glucose, xylose, galactose and arabinose (suggesting xyloglucan and arabinoxylan), none of which was consistently present in charophyte hemicelluloses. CONCLUSIONS: Homogalacturonan is an ancient streptophyte feature, albeit secondarily lost in Klebsormidium. When conquering the land, the first embryophytes already possessed rhamnogalacturonan-I. In contrast, charophyte and land-plant hemicelluloses differ substantially, indicating major changes during terrestrialization. The presence of 3-MeGal in charophytes and lycophytes but not in the 'intervening' bryophytes confirms that cell-wall chemistry changed drastically between major phylogenetic grades.
[Mh] Termos MeSH primário: Carofíceas/química
Embriófitas/química
Metilgalactosídeos/análise
Pectinas/análise
Polissacarídeos/análise
[Mh] Termos MeSH secundário: Fracionamento Celular
Parede Celular/química
Cromatografia Líquida de Alta Pressão
Cromatografia em Papel
Cromatografia em Camada Delgada
Proteínas Fúngicas/metabolismo
Glicosídeo Hidrolases/metabolismo
Monossacarídeos/análise
Espectroscopia de Prótons por Ressonância Magnética
Padrões de Referência
Estereoisomerismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Fungal Proteins); 0 (Methylgalactosides); 0 (Monosaccharides); 0 (Pectins); 0 (Polysaccharides); 1824-94-8 (methyl beta-galactoside); 8024-50-8 (hemicellulose); 89NA02M4RX (pectin); EC 3.2.1.- (Glycoside Hydrolases); EC 3.2.1.- (driselase)
[Em] Mês de entrada:1604
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150627
[St] Status:MEDLINE
[do] DOI:10.1093/aob/mcv089


  7 / 29 MEDLINE  
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[PMID]:26023931
[Au] Autor:Taujale R; Yin Y
[Ad] Endereço:Department of Biological Sciences, Northern Illinois University, DeKalb, Illinois, United States of America.
[Ti] Título:Glycosyltransferase family 43 is also found in early eukaryotes and has three subfamilies in Charophycean green algae.
[So] Source:PLoS One;10(5):e0128409, 2015.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The glycosyltransferase family 43 (GT43) has been suggested to be involved in the synthesis of xylans in plant cell walls and proteoglycans in animals. Very recently GT43 family was also found in Charophycean green algae (CGA), the closest relatives of extant land plants. Here we present evidence that non-plant and non-animal early eukaryotes such as fungi, Haptophyceae, Choanoflagellida, Ichthyosporea and Haptophyceae also have GT43-like genes, which are phylogenetically close to animal GT43 genes. By mining RNA sequencing data (RNA-Seq) of selected plants, we showed that CGA have evolved three major groups of GT43 genes, one orthologous to IRX14 (IRREGULAR XYLEM14), one orthologous to IRX9/IRX9L and the third one ancestral to all land plant GT43 genes. We confirmed that land plant GT43 has two major clades A and B, while in angiosperms, clade A further evolved into three subclades and the expression and motif pattern of A3 (containing IRX9) are fairly different from the other two clades likely due to rapid evolution. Our in-depth sequence analysis contributed to our overall understanding of the early evolution of GT43 family and could serve as an example for the study of other plant cell wall-related enzyme families.
[Mh] Termos MeSH primário: Carofíceas/genética
Evolução Molecular
Glicosiltransferases/genética
Filogenia
Proteínas de Plantas/genética
[Mh] Termos MeSH secundário: Carofíceas/enzimologia
Células Eucarióticas/enzimologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Plant Proteins); EC 2.4.- (Glycosyltransferases)
[Em] Mês de entrada:1603
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150530
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0128409


  8 / 29 MEDLINE  
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[PMID]:25839188
[Au] Autor:Chanderbali AS; He F; Soltis PS; Soltis DE
[Ad] Endereço:Department of Biology, University of Florida Florida Museum of Natural History, University of Florida achander@ufl.edu.
[Ti] Título:Out of the Water: Origin and Diversification of the LBD Gene Family.
[So] Source:Mol Biol Evol;32(8):1996-2000, 2015 Aug.
[Is] ISSN:1537-1719
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:LBD (lateral organ boundaries domain) genes are essential to the developmental programs of many fundamental plant organs and function in some of the basic metabolic pathways of plants. However, our historical perspective on the roles of LBD genes during plant evolution has, heretofore, been fragmentary. Here, we show that the LBD gene family underwent an initial radiation that established five gene lineages in the ancestral genome of most charophyte algae and land plants. By inference, the LBD gene family originated after the emergence of the green plants (Viridiplantae), but prior to the diversification of most extant streptophytes. After this initial radiation, we find limited instances of gene family diversification in land plants until successive rounds of expansion in the ancestors of seed plants and flowering plants. The most dynamic phases of LBD gene evolution, therefore, trace to the aquatic ancestors of embryophytes followed by relatively recent lineage-specific expansions on land.
[Mh] Termos MeSH primário: Carofíceas/genética
Embriófitas/genética
Evolução Molecular
Genes de Plantas/fisiologia
[Pt] Tipo de publicação:LETTER; RESEARCH SUPPORT, NON-U.S. GOV'T; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Em] Mês de entrada:1604
[Cu] Atualização por classe:160801
[Lr] Data última revisão:
160801
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150404
[St] Status:MEDLINE
[do] DOI:10.1093/molbev/msv080


  9 / 29 MEDLINE  
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[PMID]:25784475
[Au] Autor:Haig D
[Ad] Endereço:Department of Organismic and Evolutionary Biology, Harvard University, 26 Oxford Street, Cambridge, Massachusetts 02138 USA.
[Ti] Título:Coleochaete and the origin of sporophytes.
[So] Source:Am J Bot;102(3):417-22, 2015 Mar.
[Is] ISSN:1537-2197
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:UNLABELLED: • PREMISE OF THE STUDY: Zygotes of Coleochaete are provisioned by the maternal thallus before undergoing 3-5 rounds of division to produce 8-32 zoospores. An understanding of the selective forces favoring postzygotic divisions would be relevant not only to the interpretation of Coleochaete life history but also to the origin of a multicellular diploid phase in embryophytes.• METHODS: Simple optimization models are developed of the number of zygotes per maternal thallus and number of zoospores per zygote.• KEY RESULTS: Zygotic mitosis is favored once zygotic size exceeds a threshold, but natural selection usually promotes investment in additional zygotes before zygotes reach this threshold. Factors that favor production of fewer, larger zygotes include multiple paternity, low fecundity, and accessory costs of zygote production. Such factors can result in zygotes exceeding the size at which zygotic mitosis becomes profitable.• CONCLUSIONS: Coleochaete may possess large zygotes that undergo multiple fission because of accessory costs associated with matrotrophy, including costs of cortical cells and unfertilized oogonia. The unpredictability of fertilization on land is proposed to have increased accessory costs from unfertilized ova and, as a consequence, to have favored the production of larger zygotes that underwent postzygotic division to produce diploid sporophytes.
[Mh] Termos MeSH primário: Evolução Biológica
Divisão Celular
Carofíceas/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Modelos Biológicos
Ploidias
Reprodução
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1602
[Cu] Atualização por classe:150318
[Lr] Data última revisão:
150318
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150319
[St] Status:MEDLINE
[do] DOI:10.3732/ajb.1400526


  10 / 29 MEDLINE  
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[PMID]:25204387
[Au] Autor:Mikkelsen MD; Harholt J; Ulvskov P; Johansen IE; Fangel JU; Doblin MS; Bacic A; Willats WG
[Ad] Endereço:Department of Plant and Environmental Sciences, University of Copenhagen, 1871 Frederiksberg, Denmark mdmi@plen.ku.dk.
[Ti] Título:Evidence for land plant cell wall biosynthetic mechanisms in charophyte green algae.
[So] Source:Ann Bot;114(6):1217-36, 2014 Oct.
[Is] ISSN:1095-8290
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND AND AIMS: The charophyte green algae (CGA) are thought to be the closest living relatives to the land plants, and ancestral CGA were unique in giving rise to the land plant lineage. The cell wall has been suggested to be a defining structure that enabled the green algal ancestor to colonize land. These cell walls provide support and protection, are a source of signalling molecules, and provide developmental cues for cell differentiation and elongation. The cell wall of land plants is a highly complex fibre composite, characterized by cellulose cross-linked by non-cellulosic polysaccharides, such as xyloglucan, embedded in a matrix of pectic polysaccharides. How the land plant cell wall evolved is currently unknown: early-divergent chlorophyte and prasinophyte algae genomes contain a low number of glycosyl transferases (GTs), while land plants contain hundreds. The number of GTs in CGA is currently unknown, as no genomes are available, so this study sought to give insight into the evolution of the biosynthetic machinery of CGA through an analysis of available transcriptomes. METHODS: Available CGA transcriptomes were mined for cell wall biosynthesis GTs and compared with GTs characterized in land plants. In addition, gene cloning was employed in two cases to answer important evolutionary questions. KEY RESULTS: Genetic evidence was obtained indicating that many of the most important core cell wall polysaccharides have their evolutionary origins in the CGA, including cellulose, mannan, xyloglucan, xylan and pectin, as well as arabino-galactan protein. Moreover, two putative cellulose synthase-like D family genes (CSLDs) from the CGA species Coleochaete orbicularis and a fragment of a putative CSLA/K-like sequence from a CGA Spirogyra species were cloned, providing the first evidence that all the cellulose synthase/-like genes present in early-divergent land plants were already present in CGA. CONCLUSIONS: The results provide new insights into the evolution of cell walls and support the notion that the CGA were pre-adapted to life on land by virtue of the their cell wall biosynthetic capacity. These findings are highly significant for understanding plant cell wall evolution as they imply that some features of land plant cell walls evolved prior to the transition to land, rather than having evolved as a result of selection pressures inherent in this transition.
[Mh] Termos MeSH primário: Parede Celular/metabolismo
Carofíceas/metabolismo
Embriófitas/metabolismo
Polissacarídeos/metabolismo
[Mh] Termos MeSH secundário: Sequência de Bases
Evolução Biológica
Parede Celular/química
Carofíceas/química
Carofíceas/genética
Embriófitas/química
Embriófitas/genética
Glucosiltransferases/genética
Glucosiltransferases/metabolismo
Glicoproteínas/genética
Glicoproteínas/metabolismo
Glicosiltransferases/genética
Glicosiltransferases/metabolismo
Dados de Sequência Molecular
Família Multigênica
Filogenia
Proteínas de Plantas/genética
Proteínas de Plantas/metabolismo
Análise de Sequência de DNA
Spirogyra/química
Spirogyra/genética
Spirogyra/metabolismo
Transcriptoma
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Glycoproteins); 0 (Plant Proteins); 0 (Polysaccharides); EC 2.4.- (Glycosyltransferases); EC 2.4.1.- (Glucosyltransferases); EC 2.4.1.- (cellulose synthase)
[Em] Mês de entrada:1506
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140911
[St] Status:MEDLINE
[do] DOI:10.1093/aob/mcu171



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