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Soranthera
''Soranthera ulvoidea'', sometimes called the studded sea balloon, is a species of brown algae in the family Chordariaceae. It is the only species in the monotypic genus ''Soranthera''. The generic name ''Soranthera'' is from the Greek (heap) and (blooming). The specific epithet ''ulvoidea'' refers to certain resemblances the algae has with ''Ulva''. The name in Japanese is / ( or ) literally meaning "Kuril Islands bag nori". Description True to its common name, studded sea balloons are pale green to olive, ovoid sacs in diameter with small brown bumps on the surface. The bumpy 'studs' are the sori, which produce the zoosporangia. The sori are darker and measure 1 mm in diameter. There are groupings of multicellular hyaline 'hairs' in the center of the sori. The clavate to ovoid unangia (the unilocular reproductive structures or sporangia) are 78-100 μm long. The paraphyses are pluricellular (6-14 cells), also clavate, and almost double the length of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soranthera Ulvoidea F
''Soranthera ulvoidea'', sometimes called the studded sea balloon, is a species of brown algae in the family Chordariaceae. It is the only species in the monotypic genus ''Soranthera''. The generic name ''Soranthera'' is from the Greek (heap) and (blooming). The specific epithet ''ulvoidea'' refers to certain resemblances the algae has with ''Ulva''. The name in Japanese is / ( or ) literally meaning "Kuril Islands bag nori". Description True to its common name, studded sea balloons are pale green to olive, ovoid sacs in diameter with small brown bumps on the surface. The bumpy 'studs' are the sori, which produce the zoosporangia. The sori are darker and measure 1 mm in diameter. There are groupings of multicellular hyaline 'hairs' in the center of the sori. The clavate to ovoid unangia (the unilocular reproductive structures or sporangia) are 78-100 μm long. The paraphyses are pluricellular (6-14 cells), also clavate, and almost double the length of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neorhodomela Larix
''Neorhodomela larix'', commonly known as black pine, is a species of red algae native to coastal areas of the North Pacific, from Mexico to the Bering Sea to Japan. It forms dense mats on semi-exposed rocks in intertidal areas. The thallus is dark brown to black in color with whorled branches resembling a bottlebrush. Ecology The brown alga ''Soranthera ulvoidea'' is commonly found as an epiphyte An epiphyte is an organism that grows on the surface of a plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphytes grow are called phoroph ... on '' Neorhodomela'' species, especially ''N. larix'' Postels, A. & Ruprecht, F. (1840). pp. -vi iv, 1-28 -2, index atin: iv 22, -2, index 40 pls. Petropoli t. Petersburg Typis Eduardi Pratz. Isabella Abbott notes that individuals of '' Soranthera'' growing on ''Neorhodomela'' species as a host differ from those found on ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chordariaceae
Chordariaceae is a family of brown algae. Members of this family are may be filamentous, crustose with fused cells at the base, or they may be terete and differentiated into a central medulla and an outer photosynthetic cortex. They have a sporphytic thallus usually aggregated to form a pseudo-parenchyma.Pound, F. E. 1962 ''The Biology of the Algae'' Edward Arnold Ltd. As their general name suggests their pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compo ...ation is brown. Genera include:Guiry, M.D. & Guiry, G.M. (2018). AlgaeBase. World-wide electronic publication, National University of Ireland, Galway (taxonomic information republished from AlgaeBase with permission of M.D. Guiry). Chordariaceae Greville, 1830. Accessed through: World Register of Marine Species at: http: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovoid
An oval () is a closed curve in a plane which resembles the outline of an egg. The term is not very specific, but in some areas (projective geometry, technical drawing, etc.) it is given a more precise definition, which may include either one or two axes of symmetry of an ellipse. In common English, the term is used in a broader sense: any shape which reminds one of an egg. The three-dimensional version of an oval is called an ovoid. Oval in geometry The term oval when used to describe curves in geometry is not well-defined, except in the context of projective geometry. Many distinct curves are commonly called ovals or are said to have an "oval shape". Generally, to be called an oval, a plane curve should ''resemble'' the outline of an egg or an ellipse. In particular, these are common traits of ovals: * they are differentiable (smooth-looking), simple (not self-intersecting), convex, closed, plane curves; * their shape does not depart much from that of an ellipse, and * an o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stichidium
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Haustoria
In botany and mycology, a haustorium (plural haustoria) is a rootlike structure that grows into or around another structure to absorb water or nutrients. For example, in mistletoe or members of the broomrape family, the structure penetrates the host's tissue and draws nutrients from it. In mycology, it refers to the appendage or portion of a parasitic fungus (the hyphal tip), which performs a similar function. Microscopic haustoria penetrate the host plant's cell wall and siphon nutrients from the space between the cell wall and plasma membrane but do not penetrate the membrane itself. Larger (usually botanical, not fungal) haustoria do this at the tissue level. The etymology of the name corresponds to the Latin word ''haustor'' meaning ''the one who draws, drains or drinks'', and refers to the action performed by the outgrowth. In fungi Fungi in all major divisions form haustoria. Haustoria take several forms. Generally, on penetration, the fungus increases the surface ar ... [...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] |
Holdfast (biology)
A holdfast is a root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate. Holdfasts vary in shape and form depending on both the species and the substrate type. The holdfasts of organisms that live in muddy substrates often have complex tangles of root-like growths. These projections are called haptera and similar structures of the same name are found on lichens. The holdfasts of organisms that live in sandy substrates are bulb-like and very flexible, such as those of sea pens, thus permitting the organism to pull the entire body into the substrate when the holdfast is contracted. The holdfasts of organisms that live on smooth surfaces (such as the surface of a boulder) have flattened bases which adhere to the surface. The organism derives no nutrition from this intimate contact with the substrate, as the process of liberating nutrients from the substrate requires ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thallus
Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms were previously known as the thallophytes, a polyphyletic group of distantly related organisms. An organism or structure resembling a thallus is called thalloid, thallodal, thalliform, thalline, or thallose. A thallus usually names the entire body of a multicellular non-moving organism in which there is no organization of the tissues into organs. Even though thalli do not have organized and distinct parts (leaves, roots, and stems) as do the vascular plants, they may have analogous structures that resemble their vascular "equivalents". The analogous structures have similar function or macroscopic structure, but different microscopic structure; for example, no thallus has vascular tissue. In exceptional cases such as the Lemnoideae, where ... [...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] |
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