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Treubia Lacunosa
''Treubia lacunosa'' is a species of liverwort in the family Treubiaceae that is found across New Zealand in moist shady areas on logs or soil. The organism is relatively complex for a liverwort, and hosts endosymbiotic fungi which provide it with growth-inhibiting nutrients. Description ''Treubia lacunosa'' grows flat along the ground with a single fleshy but brittle axis. Two rows of lobes extend laterally outwards from this axis, and there are small upright lobules at the base of each. The entire liverwort is around 1.5 cm wide and 4–9 cm long. There are mucus-covered hairs around the rhizoids and sex organs. The sporophyte rises from around the apex of the lobe, and has a very large seta and relatively small foot. Taxonomy The diversity of ''Treubia lacunosa'' may actually consist of two species, since there are two separate populations of the species in New Zealand. One grows primarily in sheltered forest areas, while the other is found in more open and exposed habitat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marchantiophyta
The Marchantiophyta () are a division of non-vascular land plants commonly referred to as hepatics or liverworts. Like mosses and hornworts, they have a gametophyte-dominant life cycle, in which cells of the plant carry only a single set of genetic information. It is estimated that there are about 9000 species of liverworts. Some of the more familiar species grow as a flattened leafless thallus, but most species are leafy with a form very much like a flattened moss. Leafy species can be distinguished from the apparently similar mosses on the basis of a number of features, including their single-celled rhizoids. Leafy liverworts also differ from most (but not all) mosses in that their leaves never have a costa (present in many mosses) and may bear marginal cilia (very rare in mosses). Other differences are not universal for all mosses and liverworts, but the occurrence of leaves arranged in three ranks, the presence of deep lobes or segmented leaves, or a lack of clearly diff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treubiaceae
Treubiaceae is a family of liverworts in the order Treubiales.Crandall-Stotler, Barbara. & Stotler, Raymond E. "Morphology and classification of the Marchantiophyta". page 63 ''in'' A. Jonathan Shaw & Bernard Goffinet (Eds.), ''Bryophyte Biology''. (Cambridge: Cambridge University Press:2000). Species are large and leafy, and were previously classified among the Metzgeriales Metzgeriales is an Order (biology), order of Marchantiophyta, liverworts. The group is sometimes called the simple thalloid liverworts: "thallus, thalloid" because the members lack structures resembling stems or leaves, and "simple" because thei .... References * Liverwort families Treubiales {{Bryophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Zealand
New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island country by area, covering . New Zealand is about east of Australia across the Tasman Sea and south of the islands of New Caledonia, Fiji, and Tonga. The country's varied topography and sharp mountain peaks, including the Southern Alps, owe much to tectonic uplift and volcanic eruptions. New Zealand's capital city is Wellington, and its most populous city is Auckland. The islands of New Zealand were the last large habitable land to be settled by humans. Between about 1280 and 1350, Polynesians began to settle in the islands and then developed a distinctive Māori culture. In 1642, the Dutch explorer Abel Tasman became the first European to sight and record New Zealand. In 1840, representatives of the United Kingdom and Māori chiefs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endosymbiont
An ''endosymbiont'' or ''endobiont'' is any organism that lives within the body or cells of another organism most often, though not always, in a mutualistic relationship. (The term endosymbiosis is from the Greek: ἔνδον ''endon'' "within", σύν ''syn'' "together" and βίωσις ''biosis'' "living".) Examples are nitrogen-fixing bacteria (called rhizobia), which live in the root nodules of legumes, single-cell algae inside reef-building corals and bacterial endosymbionts that provide essential nutrients to insects. There are two types of symbiont transmissions. In horizontal transmission, each new generation acquires free living symbionts from the environment. An example is the nitrogen-fixing bacteria in certain plant roots. Vertical transmission takes place when the symbiont is transferred directly from parent to offspring. It is also possible for both to be involved in a mixed-mode transmission, where symbionts are transferred vertically for some generation bef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizoid
Rhizoids are protuberances that extend from the lower epidermal cells of bryophytes and algae. They are similar in structure and function to the root hairs of vascular land plants. Similar structures are formed by some fungi. Rhizoids may be unicellular or multicellular. Evolutionary development Plants originated in aquatic environments and gradually migrated to land during their long course of evolution. In water or near it, plants could absorb water from their surroundings, with no need for any special absorbing organ or tissue. Additionally, in the primitive states of plant development, tissue differentiation and division of labor was minimal, thus specialized water absorbing tissue was not required. The development of specialized tissues to absorb water efficiently and anchor themselves to the ground enabled the spread of plants to the land. Description Rhizoids absorb water mainly by capillary action, in which water moves up between threads of rhizoids and not through ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sporophyte
A sporophyte () is the diploid multicellular stage in the life cycle of a plant or alga which produces asexual spores. This stage alternates with a multicellular haploid gametophyte phase. Life cycle The sporophyte develops from the zygote produced when a haploid egg cell is fertilized by a haploid sperm and each sporophyte cell therefore has a double set of chromosomes, one set from each parent. All land plants, and most multicellular algae, have life cycles in which a multicellular diploid sporophyte phase alternates with a multicellular haploid gametophyte phase. In the seed plants, the largest groups of which are the gymnosperms and flowering plants (angiosperms), the sporophyte phase is more prominent than the gametophyte, and is the familiar green plant with its roots, stem, leaves and cones or flowers. In flowering plants the gametophytes are very reduced in size, and are represented by the germinated pollen and the embryo sac. The sporophyte produces spores (hence t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seta
In biology, setae (singular seta ; from the Latin word for "bristle") are any of a number of different bristle- or hair-like structures on living organisms. Animal setae Protostomes Annelid setae are stiff bristles present on the body. They help, for example, earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of chitin. They are classified according to the limb to which they are attached; for instance, notosetae are attached to notopodia; neurosetae to neuropodia. Crustaceans have mechano- and chemosensory setae. Setae are especially present on the mouthparts of crustaceans and can also be found on grooming limbs. In some cases, setae are modified into scale like structures. Setae on the legs of krill and other small crustaceans help them to gather phytoplankton. It captures them and allows th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treubia Tasmanica
''Treubia'' is a genus of liverworts in the family Treubiaceae.Crandall-Stotler, Barbara. & Stotler, Raymond E. (2000). "Morphology and classification of the Marchantiophyta". pages 21–70 ''in'' A. Jonathan Shaw & Bernard Goffinet (eds.), ''Bryophyte Biology''. (Cambridge: Cambridge University Press). There are seven species, all of which are restricted to the southern hemisphere. Five of the species occur in Australasia and the other ('' Treubia scapanioides'') occurs in Chile. All species are dioicous, with separate male and female gametophytes. Classification Species list: * '' Treubia insignis'' K.I.Goebel * '' Treubia lacunosa'' (Colenso) Prosk. * ''Treubia lacunosoides'' T.Pfeiff., W.Frey et M.Stech * ''Treubia pygmaea'' R.M.Schust. * '' Treubia scapanioides'' R.M.Schust. * ''Treubia tahitensis ''Treubia'' is a genus of liverworts in the family Treubiaceae.Crandall-Stotler, Barbara. & Stotler, Raymond E. (2000). "Morphology and classification of the Marchantioph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treubia Scapanioides
''Treubia scapanioides'' is a species of liverwort in the family Treubiaceae. Until recently, the genus was placed in the order Metzgeriales. There are only 6 species in the genus ''Treubia''. Five are native to Australasia but ''T. scapanioides'' is known only from Chile.Schuster, Rudolf M. (1992). The Hepaticae and Anthocerotae Hornworts are a group of non-vascular Embryophytes (land plants) constituting the division Anthocerotophyta (). The common name refers to the elongated horn-like structure, which is the sporophyte. As in mosses and liverworts, hornworts have ... of North America (Volume 5 ed.). pp. 332–333. References Treubiales {{Bryophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treubia Lacunosoides
''Treubia'' is a genus of Marchantiophyta, liverworts in the Family (biology), family Treubiaceae.Crandall-Stotler, Barbara. & Stotler, Raymond E. (2000). "Morphology and classification of the Marchantiophyta". pages 21–70 ''in'' A. Jonathan Shaw & Bernard Goffinet (eds.), ''Bryophyte Biology''. (Cambridge: Cambridge University Press). There are seven species, all of which are restricted to the southern hemisphere. Five of the species occur in Australasia and the other (''Treubia scapanioides'') occurs in Chile. All species are dioicous, with separate male and female gametophytes. Classification Species list: * ''Treubia insignis'' K.I.Goebel * ''Treubia lacunosa'' (Colenso) Prosk. * ''Treubia lacunosoides'' T.Pfeiff., W.Frey et M.Stech * ''Treubia pygmaea'' R.M.Schust. * ''Treubia scapanioides'' R.M.Schust. * ''Treubia tahitensis'' (Nadeaud) Goebel ex Besch. * ''Treubia tasmanica'' R.M.Schust. et G.A.M.Scott References Treubiales Liverwort genera {{Bryophyt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treubiales
Treubiaceae is a family of liverworts in the order Treubiales.Crandall-Stotler, Barbara. & Stotler, Raymond E. "Morphology and classification of the Marchantiophyta". page 63 ''in'' A. Jonathan Shaw & Bernard Goffinet (Eds.), ''Bryophyte Biology''. (Cambridge: Cambridge University Press:2000). Species are large and leafy, and were previously classified among the Metzgeriales Metzgeriales is an Order (biology), order of Marchantiophyta, liverworts. The group is sometimes called the simple thalloid liverworts: "thallus, thalloid" because the members lack structures resembling stems or leaves, and "simple" because thei .... References * Liverwort families Treubiales {{Bryophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
