| 单词 | perithecium |
| 例句 | In ascomycetes that build their asci inside flask-like structures called perithecia or pseudothecia, the asci take turns snaking to the little opening, poking themselves out, and firing. How Ballistic Cup Fungi Fire Their Spores (and Look Cool Doing It) 2012-09-05T20:45:15.367Z Epichloë, which clothes the sheaths and halms of grasses with its stroma, at first snowy white and later ochre-yellow as the perithecia form, is another example. Disease in Plants 2012-03-01T03:00:22Z Stroma, strō′ma, n. the subtentacular tissue or substance of an organ or cell: in fungi, the substance in which the perithecia are immersed: the solid mass left after all liquid is expressed from protoplasm.—adjs. Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) 2012-01-30T03:00:19.113Z Various types of ascocarp are characteristic of the different divisions of the Carpoascomycetes: the cleistothecium, apothecium and perithecium. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z The term conidia he uses to designate the spores of imperfect fungi without perithecia or asci, such as the Hyphomycete� and the Melanconie�. Student's Hand-book of Mushrooms of America, Edible and Poisonous As in the Discomycetes, the hymenium consists of asci, paraphyses, and mucilage, but the whole forms a less compact and more gelatinous mass within the perithecium. Fungi: Their Nature and Uses An ordinary hand glass will show how it bears perithecia in all its parts. The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth The sexual form is recognized by the appearance of microscopic, black, short-beaked fruiting structures or perithecia that are filled with sticky ascospores. Northern Nut Growers Association Report of the Proceedings at the 43rd Annual Meeting Rockport, Indiana, August 25, 26 and 27, 1952 The group 342 is characterized by a special type of ascocarp, the perithecium. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z As at present limited, the Pyrenomycetes are "ascigerous fungi having the fructification enclosed within a perithecium." Student's Hand-book of Mushrooms of America, Edible and Poisonous Perisporiacei.—Except in the perithecia rupturing irregularly, and not dehiscing by a pore, some of the genera in this group differ little in structure from the Sphæriacei. Fungi: Their Nature and Uses These asci are variously shaped bodies and are known in different orders by different names, such as ascoma, apothecium, perithecium, and receptacle. The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth The perithecia are produced on the mycelial mats beneath the loose and sometimes cracked bark of diseased oaks. Northern Nut Growers Association Report of the Proceedings at the 43rd Annual Meeting Rockport, Indiana, August 25, 26 and 27, 1952 D, The same, beginning to be surrounded by the hyphae forming the perithecium wall. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Changed "perethecia" to "perithecia" twice on page 23 of part 3: "enclosed in perithecia" and "fungi without perithecia." Student's Hand-book of Mushrooms of America, Edible and Poisonous The spores are produced on slender threads springing from the inner wall of the perithecium, and, when mature, are expelled from an orifice at the apex. Fungi: Their Nature and Uses It is nearly fleshy, a number usually growing together, or gregarious; thickened as if swollen, irregular; dirty-white, then black; the receptacle bearing perithecia in every part. The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth They have a solid carbonous interior with the perithecia imbedded near the surface. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces The cytological details of development of the perithecia are not well known; most of them appear to develop their ascogenous hyphae in an apogamous way without any connexion with an ascogonium. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Example, Common Puff Ball.Coniomycetes, in which the spores are naked, mostly terminal on inconspicuous threads, free or enclosed in a perithecium. Student's Hand-book of Mushrooms of America, Edible and Poisonous The dissemination of the sporidia may, from identity of structure in the perithecium, be deemed to follow a like method in all. Fungi: Their Nature and Uses The perithecium consists usually of an external layer of cellular structure, which is either smooth or hairy, usually blackish, and an internal stratum of less compact cells, which give rise to the hymenium. Fungi: Their Nature and Uses The perithecia are arranged in a circle neat the apex of the stroma. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces Externally these perithecia are usually furnished with long, spreading, intertwined, or branching appendages, sometimes beautifully branched or hooked at their tips. Fungi: Their Nature and Uses Pseudospores either solitary or concatenate, produced on the tips of generally short threads, which are either naked or contained in a perithecium, rarely compacted into a gelatinous mass, at length producing minute spores = Coniomycetes. Fungi: Their Nature and Uses The perithecia are engendered where two filaments cross each other. Fungi: Their Nature and Uses Seated on the mycelium, at the first as little orange points, are the perithecia, which enlarge and become nearly black. Fungi: Their Nature and Uses These appear like abortive surface perithecia, but I do not find any clue to their nature, and I do not know what they are. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces In some species, very elegant whitish appendages radiate from the sides of the perithecia, the variations in which aid in the discrimination of species. Fungi: Their Nature and Uses The features to be remembered in Perisporiacei, as forming the basis of their classification, are, that the asci are saccate, springing from the base of the perithecia, and are soon absorbed. Fungi: Their Nature and Uses Each of the tubes is then divided by transverse septa into two or three distinct cells, and in this manner the cellular walls of the perithecia come into existence. Fungi: Their Nature and Uses Also that the perithecia themselves are not perforated at the apex. Fungi: Their Nature and Uses In reality, I think it is a better Camillea, the perithecia arranged the same way, not permanent, but broken up at an early stage. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces And in Sphæriacei, although the substance is variable, the hymenium is never exposed, being enclosed in perithecia with a distinct opening at the apex, through which the mature spores escape. Fungi: Their Nature and Uses In the Hysteriacei, where the perithecia are elongated, the fissure takes place throughout their length. Fungi: Their Nature and Uses The central cell becomes the single ascus, which is characteristic of the species, and the layer which surrounds it constitutes the inner wall of its perithecium. Fungi: Their Nature and Uses A perithecium, or cell excavated in the stroma which fulfils the functions of a perithecium, is always present. Fungi: Their Nature and Uses In the following plants we find no perithecia in the ripe specimens, hence of course they will in time be considered a genus. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces The hymenium lines the inner walls of the perithecium, and forms a gelatinous nucleus, consisting of asci and paraphyses. Fungi: Their Nature and Uses When fully mature, the asci are ruptured and the sporidia escape by a pore which occupies the apex of the perithecium. Fungi: Their Nature and Uses The antheridium remains for a long time recognizable without undergoing any essential modification, but the dark colour of the perithecium soon hides it from the observer’s eye. Fungi: Their Nature and Uses Sometimes the perithecia are solitary or scattered, and sometimes gregarious, whilst in other instances they are closely aggregated and immersed in a stroma of variable size and form. Fungi: Their Nature and Uses The original, by Ehrenberg, represents them as hollow bodies, with the perithecia imbedded in the walls. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces Spores naked, mostly terminal, on inconspicuous threads, free or enclosed in a perithecium Coniomycetes. Fungi: Their Nature and Uses In these genera the sporidia, on maturity, may be observed blackening the matrix round the mouths of the perithecia. Fungi: Their Nature and Uses In this order an external stratum of cells forms a kind of perithecium, which is more or less developed in different genera. Fungi: Their Nature and Uses The Erysiphe which ultimately appears on the same mycelium consists of globose perithecia, externally furnished with thread-like appendages, and internally with asci containing sporidia. Fungi: Their Nature and Uses The perithecia are generally imbedded in the outer portion of the stroma, the mouths opening through the carbonous crust. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces The perithecia of the Sphæria are at first pale bottle-green, crowded in the centre of the Epochnium, then black green granulated, sometimes depressed at the summit, with a minute pore. Fungi: Their Nature and Uses The spherical bodies, or perithecia, were seated on a plentiful hyaline mycelium. Fungi: Their Nature and Uses But in the Discomycetes the hymenium soon becomes more or less exposed, and in the latter it is enclosed in a perithecium. Fungi: Their Nature and Uses The walls of the perithecia, rather more carbonaceous than membranaceous, are reticulated, reminding one of the conceptacles of Erysiphe, to which the perithecia bear considerable resemblance. Fungi: Their Nature and Uses The walls of the perithecia are carbonous, and confluent with the crust. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces The interior of the perithecium is occupied by a gelatinous nucleus, consisting of elongated cylindrical asci, each enclosing eight globose hyaline sporidia, with slender branched paraphyses. Fungi: Their Nature and Uses Our figure 856 shows a section, and the arrangement of the perithecia. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces The general feature in all is the presence of a perithecium, which contains and encloses the hymenium, and at length opening by a pore or ostiolum at the apex. Fungi: Their Nature and Uses The perithecia were long, cylindrical, and were arranged in a circle or were contiguous, near the summit of the stroma. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces Structure of these bodies shown by Moeller is entirely carbonous, hollow, each forming a single, carbonous perithecium. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces These filaments appear to me to be the disintegrated walls of the perithecia, and not the "filaments that bear the spores." Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces From Montagne's sectional figure, the perithecia are arranged in the same manner, and the two plants are surely cogeneric and, I believe, identical. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces In some the perithecia are simple, in others compound; in some immersed in a stroma, in others free; in some fleshy or waxy, in others carbonaceous, and in others membranaceous. Fungi: Their Nature and Uses Phylacia might be held distinct from Camillea on the ground of the powdery mass and the early disappearance of the perithecia and ascus walls. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces It is about a half inch high, with filiform stem, and few, superficial perithecia. Synopsis of Some Genera of the Large Pyrenomycetes Camilla, Thamnomyces, Engleromyces |
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