| 单词 | conidium |
| 例句 | These spores are conidia, asexually-produced reproductive cells, and are termed a Stage I infection. Zombie Cicadas' Bodies Are Literally Falling Apart 2018-04-21T04:00:00Z Bees have been shown to carry the spores of Sclerotinia and infect the stigmas of Bilberries, etc., with them; and flies convey the conidia of Ergot from grain to grain. Disease in Plants 2012-03-01T03:00:22Z One species, S. heteroica, is heteroecious; the ascospores infecting the leaves of Vaccinium uliginosum, while the conidia which then arise infect only Ledum palustre. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z The spores of Ferns, ascospores, and some conidia are also liberated explosively. The New Gresham Encyclopedia Volume 4, Part 3: Estremoz to Felspar 2011-04-14T02:00:59.373Z In autumn, flies killed by this parasite may often be found adhering to window-panes, surrounded by a halo of ejected conidia. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z 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 The passage from one to the other may be seen in the stellate form of the conidia of Nyctalis. Fungi: Their Nature and Uses Just as the uredospores and aecidiospores both show these specialized characters in the case of Puccinia graminis so we find that both the conidia and ascospores of E. graminis show this phenomenon. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Pileus symmetrical, in some species bearing large conidia upon its surface. The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth During summer innumerable conidia are produced, which spread the disease rapidly; in autumn the black ascus-fruits develop and carry the fungus through the winter. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z The spores, termed conidia, are free, as in Hymenomycetes. Student's Hand-book of Mushrooms of America, Edible and Poisonous When the conidia are sown on water they rapidly absorb the moisture, and swell; the centre of one of the extremities soon becomes a large obtuse papilla resembling the neck of a bottle. Fungi: Their Nature and Uses Besides peritheca the members of the Erysiphaceae possess conidia borne in simple chains. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z The pileus is about one-half inch broad, fleshy; conical, then hemispherical; flocculose and rather mealy, owing to the large, stellate conidia; whitish, then tinged with fawn-color. The Mushroom, Edible and Otherwise Its Habitat and its Time of Growth Both the ascospores of the sexual form and the endospores or conidia of the asexual form will cause wilt if the spores are injected into oak trees. Northern Nut Growers Association Report of the Proceedings at the 43rd Annual Meeting Rockport, Indiana, August 25, 26 and 27, 1952 That curious phycomycetous fungus that produces resting-spores by the conjugation of two similar club-shaped hyphæ, and in which conidia also occur. Iole The generation of the zoospores commences within from an hour and a half to three hours after the sowing of the conidia on water. Fungi: Their Nature and Uses Pythium is of interest as illustrating the dependence of zoospore-formation on conditions and the indeterminate nature of conidia. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z They usually appear at the base of the chains of conidia, causing the basal cell to enlarge to many times its original size, and finally kill the young conidia, which shrivel up. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses Other insects might feed on the fungus mats that are exposed through cracks in the bark and carry both the sticky ascospores and conidia to other trees. Northern Nut Growers Association Report of the Proceedings at the 43rd Annual Meeting Rockport, Indiana, August 25, 26 and 27, 1952 In the agariceæ the different kinds of vellum distinguish between species, and the color of the conidia is also of differential importance. Scientific American Supplement, No. 623, December 10, 1887 The conidia are borne upon erect, elongated filaments, originating from the creeping mycelium. Fungi: Their Nature and Uses In these three genera the conidia are cast off with a jerk somewhat in the same way as the sporangium of Pilobolus. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Now, the process of growth is simply this: When the conidia fall on the leaf, they remain there perfectly innocent and harmless unless they get a supply of water to enable them to germinate.... Scientific American Supplement, No. 595, May 28, 1887 The soja leaves, which contain little starch, but a great deal of oil and casein, are boiled, mixed with roasted barley, and then with the greenish yellow conidia powder of the Aspergillus. Scientific American Supplement, No. 531, March 6, 1886 The shape of the conidia, though presenting some varieties, is, notwithstanding, always perfectly characteristic. Scientific American Supplement, No. 385, May 19, 1883 These threads are hollow, and rarely septate; the upper portion divided into numerous branches, and these again are subdivided, the ultimate ramuli each terminated by a single conidium. Fungi: Their Nature and Uses They have characteristic conidiophores bearing numerous conidia, and also cleistothecia which are spherical in form and yellowish in colour. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z The warmth and moisture are, in fact, the conditions necessary for the germination of the conidia. Scientific American Supplement, No. 595, May 28, 1887 Placed in a position moderately lighted or protected by a blackened bell, the conidia very readily produced zoospores. Fungi: Their Nature and Uses Then it isolates itself from the germ-tube by a septum, and takes all the essential characteristics of the parent conidium. Fungi: Their Nature and Uses In the greater part, of which P. effusa may be taken as an example, the conidia have the function of simple spores. Fungi: Their Nature and Uses According to his view, the ascus is in effect the sporangium with several spores, the conidium the sporangiole with but one spore, and that not loose but fused with the sporangiole wall. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z In the middle of August, 1876," says Mr. Murray, "I instituted the following experiments, with the object of determining the mode of diffusion of the conidia of Peronospora infestans. Scientific American Supplement, No. 595, May 28, 1887 This secondary conidium can sometimes engender a third cellule by a similar process. Fungi: Their Nature and Uses Lastly, there is a third mode of germination which the conidia of P. infestans manifest, and which consists in the conidium emitting from its summit a simple or branched germ-tube. Fungi: Their Nature and Uses The short oval conidia of P. gangliformis have little obtuse papillæ at their apex, and it is at this point that germination commences. Fungi: Their Nature and Uses The simple sporophore does not necessarily terminate in conidia, however. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z The conditions which control this form of germination cannot be indicated, since some conidia which germinate after this manner will sometimes be found mixed with others, the majority of which furnish zoospores. Fungi: Their Nature and Uses It may be that the conidia themselves are in some sort of abnormal condition. Fungi: Their Nature and Uses In all the species examined the conidia possess the power of germination from the moment of their maturity. Fungi: Their Nature and Uses The conidia of P. densa are similar, but the germination is different. Fungi: Their Nature and Uses Each “conidium” contains numerous nuclei and is really a zoosporangium, as after dispersal it breaks up into a number of zoospores. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Dessication in an ordinary temperature seemed sufficient to destroy the faculty of germinating in twenty-four hours, when the conidia had been removed from the leaves on which they were produced. Fungi: Their Nature and Uses The parasites can fructify abundantly on these little stalks, and in consequence propagate themselves in the new season by the conidia coming from the vivacious mycelium. Fungi: Their Nature and Uses Its ultimate development by production of zoospores is similar to the production of zoospores from conidia, which it is unnecessary to repeat here. Fungi: Their Nature and Uses The protoplasm, at first uniformly distributed in all the conidia, appears strewn with semi-lenticular, and nearly equidistant vacuoles, of which the plane face is immediately in contact with the periphery of the protoplasm. Fungi: Their Nature and Uses Earlier than this they are covered with globose conidia. Fungi: Their Nature and Uses The vine crops are liable to be seriously affected by a species of mould, which is but the conidia form of a species of Erysiphe. Fungi: Their Nature and Uses The detached cells are the conidia of our fungus; only one is formed on each stalk. Fungi: Their Nature and Uses It remains solid and filled with protoplasm as far as the portion which forms the end through its conidia. Fungi: Their Nature and Uses A short time after the appearance of the vacuoles the entire conidium extends itself so that the papilla disappears. Fungi: Their Nature and Uses On the other hand, propagation organs, differing from those of the sporangia and their products, belong to Mucor mucedo, which may be termed conidia. Fungi: Their Nature and Uses After the articulation of the conidia, their bearers sink together by degrees, and are quite destroyed. Fungi: Their Nature and Uses The ripe conidia are round like a ball, their surface is scarcely coloured, and almost wholly smooth. Fungi: Their Nature and Uses Attempts to prove that the conidia and sporangia-bearers originate on one and the same mycelium filament may possibly hereafter succeed. Fungi: Their Nature and Uses When it has reached the front of the opening in the conidium, which is thus emptied, the mass remains immovable. Fungi: Their Nature and Uses The suspicion of the connection founded on the gregariously springing up, and external resemblance, is fully justified, if we sow the conidia in a suitable medium, for example, in a solution of sugar. Fungi: Their Nature and Uses The latter are till now alone reproductions of conidia-bearers, and have never been observed on mycelia which have grown out of conidia. Fungi: Their Nature and Uses It is clear, however, that in all these conidia, macrospores, microspores, and some spermatia, or by whatever names they may be called, there exists a power of germination. Fungi: Their Nature and Uses The rayed divergent protuberances are the direct producers and bearers of the propagating cells, spores, or conidia, and are called sterigmata. Fungi: Their Nature and Uses It is very rare that the protoplasm is not evacuated, and that the conidia give out terminal or lateral tubes in the manner that is normal to other species without papillæ. Fungi: Their Nature and Uses These are filled with protoplasm, swell more and more, and, after some time, separate themselves by a partition from the sterigma into independent cells, spores, or conidia. Fungi: Their Nature and Uses The same mycelium which forms the pedicel for the conidia when it is near the end of its development, forms by normal vegetation a second kind of fructification. Fungi: Their Nature and Uses Before their connection was known, the conceptacles and the conidia pedicels were considered as organs of two very different species of fungi. Fungi: Their Nature and Uses In Chætomium funicolum, Cooke, a black mould was also found which may possibly prove to be its conidia, but at present there is no direct evidence. Fungi: Their Nature and Uses The germination just described does not take place unless the conidia are entirely surrounded by water; it is not sufficient that they repose upon its surface. Fungi: Their Nature and Uses These are the conidia, little slender cylindrical bodies, rounded at the ends. Fungi: Their Nature and Uses For many species of Torrubia no corresponding conidia are yet known. Fungi: Their Nature and Uses |
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