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Akinete Stock Photos and Images
RM2CGTCPN–. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . years, after which a small percentage germinated. The germination proceededin one of two ways : (1) the protoplast divided into four as it escaped from the old wall ofthe akinete, four rounded cells being set free, each of which grew into a new filament(fig. 186 D and E) ; (2) the protoplast escaped without any division from the old wall,and divided first into two and then into four cells tetrahedrally arranged, each cell onbecoming free deve
RMME6K94–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet . Fig. 65. Gongrosira de Baryana B.a.h. A keimen(Ä Akinete; B junge Pfl. mit beginnender Bildung verticaler Aste; C Thallus mit Zoosporangium {g); D nocli nicht geöfi'netes Zoosporangium; E geöfi'netes Zoosporangium mit einer zurückgebliebenen Schwärmzelle; 2*'Schwärrazelle unmittelbar nach ihrem Freiwerden (die Cilien sind nicht zeichnet); 6 Schwärmzellen, welche Wasser aufgenommen haben und in der Zerstörung begriff
![. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . years, after which a small percentage germinated. The germination proceededin one of two ways : (1) the protoplast divided into four as it escaped from the old wall ofthe akinete, four rounded cells being set free, each of which grew into a new filament(fig. ] 86 D and E) ; (2) the protoplast escaped without any division from the old wall,and divided first into two and then into four cells tetrahedrally arranged, each cell onbecoming free dev Stock Photo](https://c8.alamy.com/comp/2CDF2PM/alg-vol-i-myxophyce-peridinie-bacillarie-chlorophyce-together-with-a-brief-summary-of-the-occurrence-and-distribution-of-freshwat4er-alg-years-after-which-a-small-percentage-germinated-the-germination-proceededin-one-of-two-ways-1-the-protoplast-divided-into-four-as-it-escaped-from-the-old-wall-ofthe-akinete-four-rounded-cells-being-set-free-each-of-which-grew-into-a-new-filamentfig-86-d-and-e-2-the-protoplast-escaped-without-any-division-from-the-old-walland-divided-first-into-two-and-then-into-four-cells-tetrahedrally-arranged-each-cell-onbecoming-free-dev-2CDF2PM.jpg ". Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . years, after which a small percentage germinated. The germination proceededin one of two ways : (1) the protoplast divided into four as it escaped from the old wall ofthe akinete, four rounded cells being set free, each of which grew into a new filament(fig. ] 86 D and E) ; (2) the protoplast escaped without any division from the old wall,and divided first into two and then into four cells tetrahedrally arranged, each cell onbecoming free dev Stock Photo")
RM2CDF2PM–. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . years, after which a small percentage germinated. The germination proceededin one of two ways : (1) the protoplast divided into four as it escaped from the old wall ofthe akinete, four rounded cells being set free, each of which grew into a new filament(fig. ] 86 D and E) ; (2) the protoplast escaped without any division from the old wall,and divided first into two and then into four cells tetrahedrally arranged, each cell onbecoming free dev
RMME6K6A–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet . Fig. 7s. A Pithophora Icovensis^Vatv. Akinete, gebildet in dem oberen, an- geschwollenen Teil einer Zelle (200i 1). — BP. Cleteana Wittr. Ein Zweig, der in seiner Spitze zu einem Greif- organ (Helicoidi umgebildet ist (50/1). (Nach Witt rock.) Geographische Verbreitung. Wenn man von Uro- spora absieht, welche Gattung bis jetzt nur in Europa ge- funden Nvorden, wahrscheinlich aber cjrcumpolar ist, so besitzen die übr
RM2CGMNAN–. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . D Fig. 204. Wittrockiellaparadoxa Wille. A, vegetative thread with short branches ; B, germinatingakinete which has developed a hair-cell; (7, single cell fixed and stained to show the reticulatechloroplast with many pyrenoids (with double contours and seven nuclei (darkly shaded));D, formation of aplanospores ; E, formation of a large akinete. A and B, x 123 ; G. x 530 •D and E, x 240 (after Wille). layers of the cell-walls. The branches are
RM2CDEYB7–. Algæ. Vol. I. Myxophyceæ, Peridinieæ, Bacillarieæ, Chlorophyceæ, together with a brief summary of the occurrence and distribution of freshwat4er Algæ . D A. Fig. 204. Wittrockidlaparadoxa Wille. A, vegetative thread with short branches ; B, germinatingakinete which has developed a hair-cell; C, single cell fixed and stained to show the reticulate chloroplast with many pyrenoids (with double contours and seven nuclei (darkly shaded));D, formation of aplanospores ; E, formation of a large akinete. A and B, x 123 ; C, x 530 ;D and E, x 240 (after Wille). layers of the cell-walls. The branches a
RMRPX8PK–. The algae. Algae. 52 THE ALGAE filament is made up of a series of H pieces and as a result the fila- ment readily fragments. At cell division a new H piece is intro- duced between the two daughter protoplasts. In young cells the parietal plastid is commonly reticulate but older cells are so filled with starch that plastid structure is difficult to see. There are no. D I C Fig. 24 Microspora amoena. A, portion of thread. B, early cleavage in swarmer formation. C, two young cells ( x 745). D, akinete formation ( x 550). E, formation of aplanospores. F, G, stages in germination of aplanospores.
RMRHWWB7–. Beitrge zur Kryptogamenflora der Schweiz. 289. Fig. 204. Gongrosira de Baryana. — A, cellule (akinete) detachee, fonctionnant comme spo- range; ß, portion du thalle pseudo-parenchyma- teux (sur pierres inondees, lac du Grand St-Ber- nard). minaux qui ont tan- töt la forme d'une bouteille, tantötsont en forme de massue. 3° par des etats unicellulaires dits Codiolum et qui ne sont autre chose que des akinetes qui ont grossi,sont devenues monstrueuses et ont produit des verruco- sites de la mem- brane qui s'enfon- cent dans le sub- stratum. Chez les Gongro- sira, le thalle est ordinairement in-
RMRHWWAE–. Beitrge zur Kryptogamenflora der Schweiz. Fig. 204. Gongrosira de Baryana. — A, cellule (akinete) detachee, fonctionnant comme spo- range; ß, portion du thalle pseudo-parenchyma- teux (sur pierres inondees, lac du Grand St-Ber- nard). minaux qui ont tan- töt la forme d'une bouteille, tantötsont en forme de massue. 3° par des etats unicellulaires dits Codiolum et qui ne sont autre chose que des akinetes qui ont grossi,sont devenues monstrueuses et ont produit des verruco- sites de la mem- brane qui s'enfon- cent dans le sub- stratum. Chez les Gongro- sira, le thalle est ordinairement in- crus
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