Academic literature on the topic 'Pelliaceae'

Söderström, Lars, Hagborg, Anders, Konrat, Matt Von (2013): Notes on Early Land Plants Today. 19. Validation of two names in Pellia (Pelliaceae, Marchantiophyta). Phytotaxa 76 (3): 39-40, DOI: 10.11646/phytotaxa.76.3.7, URL: http://biotaxa.org/Phytotaxa/article/view/142

Twenty-one liverworts from Mexico, Ecuador, Greece, Germany and Japan were extracted with diethyl ether and the crude extracts analyzed by TLC and GC/MS. Several volatile sesqui- and diterpenoids, and also bibenzyls were identified. Many of these compounds are important chemical markers of liverworts genus or family. Sacculatane-type diterpene dialdehydes occur in the Pelliaceae family, while bibenzyls, especially with a prenyl group are characteristic of the Japanese Radula perrottetii. Eudesman-type sesquiterpene lactones and pinguisane-type sesquiterpenoids are significant markers of Frullania tamarisci and Trocholejeunea sandvicensis, respectively. The Greek Fossombronia angulosa contained exactly the same compounds previously found in brown algae. Such chemical similarity suggests that some families of liverworts and algae may have an evolutionary relationship.

Two sibling species in the <em>Pellia epiphylla</em> (L.) Corda (n=9) complex, viz. <em>Pellia epiphylla</em> sp. <em>N</em> and <em>Pellia epiphylla</em> sp. <em>S</em> were compared in their protein concentration and in the dynamics and also in relative activity of some enzymes: malate dehydrogenase (MDH), esterase (EST), peroxidase (PX) and aspartate aminotransferase (GOT). Serological properties of their antigens were studied as well. Activity of malate dehydrogenase, esterase and aspartate aminotransferase was significantly higher in clons of <em>Pellia epiphylla N </em>than <em>Pellia epiphylla S</em>. Some differences in soluble protein concentration and in the quantities of the AI to AIV antigens between the two sibling species were detected.

The simple thalloid liverwort Apopellia endiviifolia is a widespread Holarctic species belonging to the family Pelliaceae. European populations of this species comprise two distinct evolutionary lineages named “species A”, known also as water form, and typical, mainly terrestrial forms named “species B”. Newly sequenced, assembled and annotated chloroplast genomes of six European specimens belonging to the two cryptic lineages occupying different microhabitats, revealed the structure typical for liverworts and previously sequenced reference. The plastomes of A. endiviifolia are 120,537–120,947 bp long with a structure typical for most plants, including a pair of IR regions (each of 9,092–9,207 bp) separated by LSC (82,506–82,609 bp) and SSC (19,854–19,924 bp) regions and consist of 121 unique genes, including 81 protein-coding genes, 6 genes of unknown function (ycf genes), 4 ribosomal RNAs and 30 transfer RNAs. Comparative analysis of typical, terrestrial and water forms revealed 4971 molecular diagnostic characters (MDCs), which exceeds numbers found in many well recognized liverworts taxa. Moreover, beside the presence of evolutionary hotspots like ycf1 and ycf2 genes and several intergenic spacer like ndhB-psbM, rps4-ndhJ and ndhC-atpE, the molecular identification of Apopellia cryptic species was possible by almost 98% of 500 bp long frames simulating mini barcodes. The different ecological niches can be driven by different pressures of positive selection, which was detected in nine genes including ccsA, ndhD, ndhF, petA, psbB, psbC, rpoB, ycf1 and ycf2. Despite clearly genetic differences and ecological preferences, the current observation of morphological differentiation does not no allow to separate terrestrial and water forms into taxonomic species.

Konstantinova, Nadezhda A., Lapshina, Elena D. (2017): The hepatics of the Upper Puiva River (Sub-Polar Ural, Khanty-Mansi Autonomous District). Arctoa 26 (1): 35-46, DOI: 10.15298/arctoa.26.03, URL: https://doi.org/10.15298/arctoa.26.03

Popova, Natalia N. (2018): Bryoflora of the state memorial historical-art and natural Museum reserve of V. D. Polenov ?Polenovo? (Tula Province, Central Russia). Arctoa 27 (1): 54-59, DOI: 10.15298/arctoa.27.06, URL: https://doi.org/10.15298/arctoa.27.06

Söderström, Lars, Hagborg, Anders, Konrat, Matt Von (2016): Early Land Plants Today: Index of Liverworts & Hornworts 2013-2014. Phytotaxa 269 (3): 133-185, DOI: 10.11646/phytotaxa.269.3.1, URL: http://dx.doi.org/10.11646/phytotaxa.269.3.1

Ros, Rosa M., Olaf, Susana Rams, Eloy, Olaf Werner, Cerón, Eloy (2024): Revisiting the Bryophyte Checklist of Algeria: Exploring Diversity and Distribution. Cryptogamie, Bryologie 20 (5): 49-116, DOI: 10.5252/cryptogamie-bryologie2024v45a5, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/bryologie2024v45a5.pdf

The paper presents the result of a morphotaxonomic study on the liverworts of Gobind National Park in North-west Himalaya. A total of nine species, viz. Plagiochila asplenioides (L.) Dum. (Plagiochilaceae), Porella campylophylla var. ligulifera (Tayl.) Hatt. (Porellaceae), Porella hattorii Udar & Shaheen (Porellaceae), Pellia endivaefolia (Dicks.) Dum. (Pelliaceae), Metzgeria hamata Lindenb. (Metzgeriaceae), Targionia indica Udar & Gupta (Targioniaceae), Conocephalum conicum (L.) Dum. (Conocephallaceae), Reboulia hemisphaerica (L.) Raddi (Rebouliaceae), and Dumortiera hirsuta (Sw.) Reinw., Blume & Nees (Marchantiaceae) have been described in present communication. This constitutes first record of liverworts from this National Park, situated in Uttarkashi district of newly created state of Uttaranchal.

Noteroclada confluens Taylor ex Hook. & Wilson é uma hepática de aparência folhosa, pertencente à família Pelliaceae (Marchantiophyta). Ocorre predominantemente em regiões montanhosas, declives e locais próximos à córregos, em solos argilosos. O presente estudo teve por objetivo descrever a morfologia, anatomia e histoquímica das estruturas do gametófito e esporófito de N. confluens, coletados no estado do Rio Grande do Sul, Brasil, sob microscopia óptica, eletrônica de varredura e confocal de varredura a laser fornecendo, especialmente, dados sobre as estruturas relacionadas com a reprodução sexuada e assexuada, contribuindo para uma melhor caracterização do gênero e da família. O gametófito de N. confluens apresenta-se na forma de um talo profundamente lobado, com lobos predominantemente com uma única camada de células. Os lobos são conectados a região mediana, mais espessada, rica em grãos de amido. Na região mediana ventral do gametófito, conectam-se inúmeros rizoides unicelulares. Todo o talo é constituído por um parênquima formado por células de paredes delgadas, de constituição pectocelulósica, sem espessamentos angulares. Cada célula apresenta um único e grande vacúolo e diversos oleocorpos. Os oleocorpos formam grupos de corpos esféricos ou ovalados, constituídos por sesquiterpenoides. Pigmentos flavonóides foram encontrados constituindo as paredes de algumas células do talo. A partir da face ventral, podem emergir tubers de formato arredondados, com um parênquima contendo grãos de amido, funcionando como um órgão armazenador de substâncias de reserva. Nas coletas realizadas no Rio Grande do Sul, foram identificados dois morfotipos: morfotipo 1, com poucos oleocorpos por célula e sem tubers; morfotipo 2, com muitos olecorpos por célula e presença de tubers. Os gametângios estão distribuídos em fileiras na região mediana, na face dorsal, sendo normalmente duas fileiras, de anterídios, e uma, de arquegônios. Os arquegônios apresentam um material polissacarídico na região do canal do ventre, o que pode facilitar a entrada dos anterozoides. Os anterídios são pedunculados e ovais, apresentam uma única camada de células estéreis protetora e estão inclusos, individualmente, em uma câmara anteridial, com poro apical. Após a fecundação da oosfera, forma-se um esporófito que permanece circundado pela caliptra e pelo celocaule, até a maturação dos esporos. O esporófito é formado pela cápsula, seta e pé. A parede da cápsula é biestratificada e apresenta espessamentos angulares na epiderme e anelares ou helicoidais, no estrato interno ou subepidérmico. Na base da cápsula, ocorre formação de um denso elateróforo. A cápsula se abre através de quatro fendas longitudinais de deiscência, os estômios, as quais resultam na formação de quatro valvas. A seta é cilíndrica, hialina e levemente estriada, apresentando grãos de amido nas células parenquimáticas da região cortical e epiderme. A elevação ocorre por expansão celular. O pé tem formato de “taça” e apresenta diversos grãos de amido. Na junção gametófitoesporófito (placenta) ocorre um espaço placental. Não foram encontradas células de tranferência na zona da placenta, tanto no gametófito como no esporófito. O tecido esporogênico apresenta células com paredes pectocelulósicas delgadas, a partir do qual se diferenciam dois tipos celulares: os esporócitos, arredondados e com uma parede espessada hialina, e os elaterócitos, mais alongados e com parede espessada de natureza péctica. As células- mãe de esporos são tetralobadas e se individualizam. Nesse estádio apresentam uma parede espessada mais delgada e de natureza hemicelulósica. A meiose leva à formação de quatro esporos unicelulares. Ao redor de cada esporo, deposita-se uma delgada primexina. O desenvolvimento dos esporos é endospórico, e os protonemas jovens, envolvidos ainda pela esporoderme, são esferoidais ou subesferoidais, com células de paredes pectocelulósicas delgadas, muitas vezes repletas de grãos de amido. A esporoderme está estratificada em uma intina, de composição pectocelulósica, e uma exina, impregnada constituída por esporopolenina. A exina forma uma escultura do tipo rugulada. Os elatérios morrem na maturidade e apresentam de duas a três bandas de espessamentos helicoidais, de pigmentação amarronzada e natureza fenólica e polissacarídica. Na exina, a esporoderme apresenta uma região de escultura reduzida.<br>Noteroclada confluens Taylor ex Hook. & Wilson is a liverwort with a leafy appearance which belongs to the Pelliaceae (Marchantiophyta) family. This species occurs mostly in mountainous regions, descending slopes and places near streams. In this study, the morphology, anatomy and histochemistry of the structures of the gametophyte and sporophyte of N. confluens are described. This species was collected in Rio Grande do Sul state, Brazil. The study in light microscopy, scanning electron microscopy and confocal laser scanning provides, especially, data about structures related to sexual and asexual reproduction, contributing to a better understanding of the genus and family. The gametophyte of N. confluens presents a form of a deeply lobed stem, the lobes predominantly with a single layer of cells. The lobes are connected to a central region, denser, rich in starch grains. Numerous unicellular rhizoids are connected in the ventral surface of the central region. The entire stem is composed by a parenchyma formed by thin-walled pectin and cellulose cells, with no angular thickening. Each cell has a single large vacuole and several oil bodies. The oil bodies form groups of spherical or oval bodies and present sesquiterpenes in its constitution. Flavonoid pigments were found forming the walls of some cells of the stem. In this ventral surface, round shaped tubers may emerge with a parenchyma containing starch grains, acting as a storage organ for substances. Two morphotypes were identified in a collection in Rio Grande do Sul: morphotype 1, with few oil bodies per cell and without tubers; and morphotype 2, with many oil bodies per cell and the presence of tubers. The gametangia are distributed in rows in the central region on the dorsal surface. Usually there are two rows of antheridia and one of archegonia. The archegonia have a polysaccharide material in the channel region of the venter, which may facilitate the entry of antherozoid. The antheridia are stalked and oval. They have a single protective layer of sterile cells and are included individually in a single antheridial chamber, with apical ostiole. After the fertilization of the egg cell, there is the formation of a sporophyte that remains surrounded by calyptra and the caulocalyx until the maturation of the spores. The sporophyte is formed by the capsule, seta and foot. The capsule wall has two layers of cells and presents angular thickening in the epidermis and annular or helical thickening in the internal layer. At the base of the capsule there is a formation of a dense elaterophore. The capsule opens in four longitudinal dehiscence cracks, the stomion, which result in the formation of four valves. The seta is cylindrical, hyaline, slightly striated, showing starch grains in parenchyma cells of the cortical region and epidermis. The increase happens by cell expansion. The foot is cup-shaped and it presents several starch grains. In the gametophyte-sporophyte junction (placenta) there is a placental space. Both gametophyte and sporophyte.do no present transfer cells in the placenta. The sporogenic tissue has cells with pectin and cellulose walls, which are differentiated in two types: the sporocytes, rounded with a thick hyaline wall, and the elaterocytes, more elongated and presenting a wall of pectin. The spore mother cells are tetralobed and become individualized. On this stage, they have a thinner thickened wall cell and it is made of hemicelluloses. After meiosis, four unicellulars spores are formed. Around each spore a thin primexina is deposited. The spore development is endosporic and the young protonemas are spheroidal and still involved by sporoderm. The cells of young protonema have thin cell walls with pectin and cellulose, often presenting many starch grains. The sporoderm presents an intine with pectin and cellulose composition, and an exine, consisting of impregnated esporopolenina. The exine sculpture is rugulate. The elaters die at maturity and have two or three bands of spiral thickening, which have brown pigmentation and a phenolic and polysaccharide composition. the exine, the sporoderm presents a region of small sculpture.