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Liverworts During the 16th century, it was commonly applied to the genus Marchantia, a flat, branching, ribbon-shaped plant the margins of which were claimed to resemble the lobes of a liver. Because Marchantia is very common in northern Europe, it was, in the latter half of the 19th century, the most studied liverwort and, consequently, was described in all the books, including American botany texts which were patterned after those published in Europe. Regrettably, the practice of using Marchantia has persisted to the present time; it is still the most, and not uncommonly the only, illustrated liverwort in introductory texts. www.bio.umass.edu /biology/conn.river/liverwts.html   (796 words)

The Thallus of Marchantia He came upon the section dealing with the Marchantia, which has a stem-like structure known as a thallus and reproduces asexually by forming gemmae on the upper surface of the thallus that starts new plants. It was decided that since the Thallus of Marchantia was, after all, from Arabia, he was probably anti-Semitic or at least anti-Zionist and his visit should be protested. The plane landed and the Thallus of Marchantia also known as Arthur Schein walked proudly down the gangway where the mayor's official chauffeur-driven limousine awaited him. www.stjohnbeachguide.com /Thallus.htm   (1122 words)

What are bryophytes? Riccia, Marchantia, Conocephalus, Asterella, and many others vegetate luxuriously, and often fruit if kept on moist soil in a shady part of the greenhouse, and they do fairly well in the ordinary laboratory if covered with glass and protected from too intense light. Marchantia and similar forms are not difficult to establish out of doors. Such freezing as Marchantia receives in the vicinity of Chicago does not prevent it from appearing again the next spring. www.publicbookshelf.com /public_html/Methods_in_Plant_Histology/whatareb_ej.html   (717 words)

Marchantia polymorpha   (Site not responding. Last check: 2007-10-13) One of the most familar liverworts is Marchantia, a fairly widespread, terrestrial genus that grows on moist soil and rocks. The gametophytes of Marchantia are strictly unisexual, and the male and female gamethophytes can readily be identified by their gametophores, which are structurally quite distinct from one another. In Marchantia, the gemmae are produced in special cup-like structures--called gemma cups--located on the dorsal surface of the gametophyte. botit.botany.wisc.edu /courses/tour/Roomsix-Ma.html   (335 words)

The Mitochondrial Genome of Chara vulgaris: Insights into the Mitochondrial DNA Architecture of the Last Common ... the Marchantia trnR(ucg) gene arose from a mutation in the anticodon All Chara and Marchantia introns that were identified as belonging to group IIA were analyzed, whereas only those of Chaetosphaeridium and Arabidopsis that share insertion sites with their Chara counterparts were examined. as Marchantia introns (the clustered nad2.i1, cox2.i2, and nad4L.i2 www.plantcell.org /cgi/content/full/15/8/1888   (8945 words)

Information on Marchantia polymorpha Ground liverwort (Bot.), a flowerless plant with a broad flat forking thallus and the fruit raised on peduncled and radiated receptacles ({Marchantia polymorpha). A flowerless plant ({Marchantia polymorpha), having an irregularly lobed, spreading, and forking frond. Marchantia polymorpha n : a common liverwort [syn: hepatica] www.wkonline.com /d/Marchantia_polymorpha.html   (1726 words)

Botanical and ecological characteristics   (Site not responding. Last check: 2007-10-13) Marchantia polymorpha grows best in subcalcareous soil conditions (pH 6.0) under full sunlight [42,46]. Marchantia polymorpha mats can interfere with the establishment of seedlings of other vegetation [22]. SEASONAL DEVELOPMENT : Marchantia polymorpha gametophores appear and archegonia are ready for fertilization in early to late May [18]. www.fs.fed.us /database/feis/plants/bryophyte/marpol/botanical_and_ecological_characteristics.html   (392 words)

Marchantia polymorpha   (Site not responding. Last check: 2007-10-13) This is the typical appearance of Marchantia polmorpha (common liverwort). Marchantia polymorpha reproduces sexually by producing both male an female structures that contain the sperm and eggs. This specimen of marchantia polymorpha was not found in the Southside but is shown here to illustrate the form taken by plant when allowed to grow on open ground. www.microview.org.uk /millennium/Pages/marchantia_polymorpha.htm   (313 words)

J.U. & C.G.Lloyd: Drugs and Medicines of North America: Hepatica.   (Site not responding. Last check: 2007-10-13) This term properly belongs to a cryptogamic plant of the genus Marchantia, supposed to be good for diseases of the liver, and in Europe it is applied to the latter plant. It is derived from the Greek hepar, liver, and was first applied to the cryptogamous Marchantia, but was later applied to this plant on account of its liver-shaped leaves, which, from the old doctrine of signatures, were supposed to be a remedy for liver troubles. In 1817, Hooper's Medical Dictionary said of Marchantia, "so-called because it was thought to be useful in diseases of the liver," but to liver leaf the same work ascribed no hepatic value. www.ibiblio.org /herbmed/eclectic/dmna/hepatica.html   (6380 words)

Open Directory - Science: Biology: Flora and Fauna: Plantae: Hepaticophyta: Marchantiales: Marchantiaceae   (Site not responding. Last check: 2007-10-13) Marchantia polymorpha - Archegoniophores bearing sporophytes on their undersides. Marchantia polymorpha - Top view of antheridiophores (light green structures) arising from the complex thallus of the gametophyte (darker green). Marchantia polymorpha - Photograph of the male plants. dmoz.org /Science/Biology/Flora_and_Fauna/Plantae/Hepaticophyta/Marchantiales/Marchantiaceae   (139 words)

Marchantia English words defined with "Marchantia": genus Marchantia ♦ Marchantia polymorpha. "Marchantia" is generally used as a noun (proper) -- approximately 100.00% of the time. "Marchantia" is used about 3 times out of a sample of 100 million words spoken or written in English. www.websters-online-dictionary.org /definition/english/Ma/Marchantia.html   (383 words)

Evaluation of Carbohydrate Utilization and Photosynthetic Carbon Dioxide Fixation in Photomixotrophic Culture of ...   (Site not responding. Last check: 2007-10-13) Heterotrophic and photomixotrophic cultures of liverwort cells, Marchantia polymorpha, were carried out to investigate growth properties, carbon source utilization and photosynthetic activity of the cells under varied light conditions. The cultures were conducted at incident light intensities of I 0 = 0, 30 and 100 W/m 2 using an externally illuminated bioreactor containing a medium with 10 kg/m 3 glucose as an organic carbon source. It was estimated that the cells possessed photosynthetic ability to fix most of CO 2 evolved by respiration over absorbed light energy of about 200 W/kg-dry cells. www.scej.org /ronbun/JCEJe/e33p0277.html   (316 words)

Plant Profile for Marchantia ()   (Site not responding. Last check: 2007-10-13) Marchantia L. View 4 genera in Marchantiaceae or click below on a name for species profiles. Marchantia L. Click on a scientific name below to expand it in the PLANTS Classification Report. Marchantia L. View taxonomic account from Integrated Taxonomic Information System (ITIS) for ITIS Taxonomic Serial Number 15584. plants.usda.gov /cgi_bin/plant_profile.cgi?symbol=MARCH   (177 words)

Resistant tissues of modern marchantioid liverworts resemble enigmatic Early Paleozoic microfossils -- Graham et al. ... Scales are not autofluorescent, possibly because of quenching by other cell-wall materials [like rhizoids, lower epidermal scales survive rotting and acetolysis (data not shown)]. Rhizoids of varying diameter and wall thickness occur in a cluster at the core (arrow). (E) Remains of rotted Marchantia thallus, consisting of lower epidermal cells and rhizoids of differing morphology and width (arrows). www.pnas.org /cgi/content/full/101/30/11025   (2967 words)

Botany Glossary "A" Aerenchyma are parenchyma cells that are associated with an air space or surround open canals as in the air space of a monocot vascular bundle or the vallecular or carinal canal of a horsetail. This is a chamber in the upper portion of the thallus that has a pore at the top so that gas exchange can occur between the leaf and the open air outside the thallus. The auricles are to small small fingers of tissue at the base of the leaf blade of a grass that extend partially around the grass stem. www.puc.edu /Faculty/Gilbert_Muth/botglosa.htm   (969 words)

marchantia polymorpha - OneLook Dictionary Search Tip: Click on the first link on a line below to go directly to a page where "marchantia polymorpha" is defined. marchantia polymorpha : WordNet 1.7 Vocabulary Helper [home, info] Marchantia polymorpha : LookWAYup Translating Dictionary/Thesaurus [home, info] www.onelook.com /?loc=rescb&w=marchantia+polymorpha&ls=a   (79 words)

Plastid ORF170   (Site not responding. Last check: 2007-10-13) The 2400 nucleotide transcript accumulated progressively during endosperm development and became significantly more abundant between 8 and 12 DAP similar to the pattern for accumulation of spliced and unspliced transcripts for the rps12 gene (MNL 63:105, 1989). No genes are known to be located on the BamHI 14 region in maize, but tobacco, Marchantia, rice and cauliflower have highly homologous open reading frames (167, 168, 170, 169 amino acids, respectively) in the corresponding region. When shorter 100% conserved amino acid sequences between tobacco, rice and Marchantia were used, however, we found homology to several proteins. www.maizegdb.org /mnl/64/163kangasjarvi.html   (564 words)

Liverwort and Pearlwort Management   (Site not responding. Last check: 2007-10-13) In May and June, the Marchantia will start to produce its fruiting bodies (call them flowers if you like...but they are more like mushrooms than flowers). Once the Marchantia is in the fruiting stage, it seems to be more resistant to chemical controls. Thus, this is the time of year when the Marchantia life cycle is most susceptible to control. www.ces.ncsu.edu /fletcher/staff/rbir/liverwort.html   (607 words)

Nikon MicroscopyU: Confocal Image Gallery - Marchantia Sporophyte (Sequence 1) View a lower magnification confocal sequence of marchantia sporophytes. These mature sporophytes are the asexual reproductive form for the Marchantia order of Bryophytes, moss-like plants of the division Bryophyta, also known as liverworts, or "liver plants." The thallus, part of the plants' anatomy, has the appearance of a lobed liver, which gave rise to the name. Bryophytes are ancient plants and have a worldwide distribution, but most commonly are found in the tropics. www.microscopyu.com /galleries/confocal/marchantiasporophyte100x.html   (225 words)

Maintenance of sexually dimorphic preadult traits in Marchantia inflexa (Marchantiacae) -- Fuselier and McLetchie 89 ... Maintenance of sexually dimorphic preadult traits in Marchantia inflexa (Marchantiacae) -- Fuselier and McLetchie 89 (4): 592 -- American Journal of Botany Maintenance of sexually dimorphic preadult traits in Marchantia inflexa (Marchantiacae) Marchantia inflexa, a dioecious thallose liverwort, is sexually www.amjbot.org /cgi/content/abstract/89/4/592   (215 words)

Thallose liverwort form   (Site not responding. Last check: 2007-10-13) Marchantia berteroana Seven gemmae are seen inside a 3-4 mm diameter cup with a toothed margin. Marchantia macropora A raised rim surrounds very large pores that lead into chambers containing photosynthetic cells. An uncommon liverwort occasionally found in moist areas throughout the North Island. www.sbs.auckland.ac.nz /info/schools/nzplants/moss_liver_thall_form.htm   (227 words)

The complete nucleotide sequence of the hornwort (Anthoceros formosae) chloroplast genome: insight into the earliest ... the bryophyte liverwort Marchantia (20), the green alga Chlorella Marchantia and Anthoceros formed a clade with a relative probability The intron of rrn23 has been found in Anthoceros and Chlorella (21) but no intron has been found in Marchantia (20) and Chaetosphaeridium (24). nar.oupjournals.org /cgi/content/full/31/2/716   (2937 words)

Marchantia polymorpha - KAS II   (Site not responding. Last check: 2007-10-13) one of the KCS gene family in the liverwort Marchantia polymorpha. Dioxide Fixation in Photomixotrophic Culture of Marchantia polymorpha and photomixotrophic cultures of liverwort cells, Marchantia polymorpha, Observationer af Almindeligt Lungemos Marchantia polymorpha (ialt 1). marchantia-polymorpha.webinforsearch.com   (165 words)

[No title] Hepatopsida - Marchantia - Section through the antheridiophore of Marchantia. Hepatopsida - Marchantia - Male and female plants of Marchantia. Hepatopsida - Marchantia - Detail of the epidermal surface of the thallus of Machantia in the region of an air pore. biodidac.bio.uottawa.ca /thumbnails/searchresults.htm?formattype=diagbw&phylum=Plantae   (120 words)

Cellular Localization of Isoprenoid Biosynthetic Enzymes in Marchantia polymorpha. Uncovering a New Role of Oil Bodies ... Cellular Localization of Isoprenoid Biosynthetic Enzymes in Marchantia polymorpha. Marchantia polymorpha thalli with gemma cups were collected in the greenhouses of the Station de Recherches Forestières (Institut The antibodies were raised in rabbits, either from enzymes purified to homogeneity or from a synthetic peptide. www.plantphysiol.org /cgi/content/full/124/3/971   (3411 words)

Introductory   (Site not responding. Last check: 2007-10-13) ABBREVIATION : MARPOL SYNONYMS : Marchantia aquatica (Nees) Burgeff SCS PLANT CODE : NO-ENTRY COMMON NAMES : liverwort TAXONOMY : The currently accepted scientific name of this liverwort is Marchantia polymorpha L.; it is in the class Hepaticae [16,34]. The following varieties are recognized based on ecological and morphological characteristics [13,14]: Marchantia polymorpha L. var. aquatica Nees --often submerged with the thallus erect or suberect Marchantia polymorpha L. var. www.fs.fed.us /database/feis/plants/bryophyte/marpol/introductory.html   (138 words)

The Y chromosome in the liverwort Marchantia polymorpha has accumulated unique repeat sequences harboring a ... The Y chromosome in the liverwort Marchantia polymorpha has accumulated unique repeat sequences harboring a male-specific gene -- Okada et al. The Y chromosome in the liverwort Marchantia polymorpha has accumulated unique repeat sequences harboring a male-specific gene Marchantia polymorpha, a specific Y chromosome is present in the www.pnas.org /cgi/content/full/98/16/9454   (3648 words)

Botany Lab Help - Ex. 12 Bryophytes Examine the stages in the reproductive cycle of a thallose liverwort using Marchantia as an example. Examine the stages in the reproductive cycle of a moss using living material of Polytrichum and slides of Mnium. Learn the patterns of reproduction of Marchantia and a moss. samson.kean.edu /~breid/Botany/botlab12.html   (386 words)

Sex-Determining Mechanisms in Land Plants -- Tanurdzic and Banks 16 (Supplement 1): S61 -- THE PLANT CELL the homogeneity of repetitive sequences in the Marchantia Y with the Y chromosome of Marchantia and the sex-determining Construction of male and female PAC genomic libraries suitable for identification of Y-chromosome-specific clones from the liverwort, Marchantia polymorpha. www.plantcell.org /cgi/content/full/16/suppl_1/S61   (7299 words)

Marchantia polymorpha liverwort page Roots: Marchantia do not have roots, they have rhizoids which are root-like structures that lack xylem and phloem. Related species: Lunularia cruciata, which is another liverwort similar in appearance to Marchantia. Only one, Marchantia polymorpha, is a weed problem in nurseries. oregonstate.edu /dept/nursery-weeds/weedspeciespage/liverwort/liverwort_page.html   (260 words)

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