The Fresh-water Algae of the United StatesMcGraw-Hill, 1950 - 719 pagine This edition follows the general plan of the first edition, except for treatment of the species in the various genera. In the first edition, where there were less than ten species in a genus, each was named and briefly characterized. In this edition the species of a genus are listed and references given to sources where a complete description of each of them can be found. Another change is the addition of a survey of the Charophyceae, Cryptophyceae, and Chloromonadales, groups that were not treated in the first edition. |
Dall'interno del libro
Risultati 1-3 di 89
Pagina 58
... germination is not the same for all green algae . In Chlamydomonas Reinhardi Dang . the writer has found that zygotes may be induced to germinate 20 days after they are formed ; in Ulothrix zygotes germinate 5 to 9 months after their ...
... germination is not the same for all green algae . In Chlamydomonas Reinhardi Dang . the writer has found that zygotes may be induced to germinate 20 days after they are formed ; in Ulothrix zygotes germinate 5 to 9 months after their ...
Pagina 290
... Germination of a zygote is gen- erally preceded by a redevelopment of chlorophyll . A gamete that fails to unite with another gamete may round up and secrete a wall whose structure and ornamentation are identical with that of the zygote ...
... Germination of a zygote is gen- erally preceded by a redevelopment of chlorophyll . A gamete that fails to unite with another gamete may round up and secrete a wall whose structure and ornamentation are identical with that of the zygote ...
Pagina 550
... germinate into vegetative filaments as soon as favorable conditions return . One of the best examples of this is to be seen in the regular germination of the akinetes of terrestrial species of Cylindrospermum immediately after a heavy ...
... germinate into vegetative filaments as soon as favorable conditions return . One of the best examples of this is to be seen in the regular germination of the akinetes of terrestrial species of Cylindrospermum immediately after a heavy ...
Sommario
NATURE EVOLUTION AND CLASSIFICATION OF THE ALGAE | 1 |
THE DISTRIBUTION AND OCCURRENCE OF FRESHWATER ALGAE | 12 |
COLLECTION PRESERVATION AND METHODS OF STUDYING THE FRESHWATER ALGAE | 27 |
Copyright | |
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Parole e frasi comuni
akinetes algae algal apical aplanospores Asexual reproduction Auxospores axial axis basal biflagellate branches cell division cell wall Chlorophyceae chloroplast chromatophores colony conjugation contains contractile vacuoles cup-shaped cylindrical cytoplasm daughter cells develop diatoms differ as follows discoid ellipsoidal elongate epiphytic eyespot filaments flagella flagellated flagellum flora formation four free-floating fresh-water frustules G. M. Smith G. S. West gametes Geitler gelatinous gelatinous envelope gelatinous material gelatinous sheath genus germination girdle view globose growing heterocysts Ibid intercalary bands irregularly isogamous Klebs Korshikov Kütz laminate layer liberated longitudinal lorica motile Myxophyceae Näg nodule nucleus Oedogonium ornamentation parent-cell wall parietal Pascher plankton plast poles portion posterior Protistenk protoplast pyrenoid quadriflagellate raphe rhizoidal semicells sessile setae Sexual reproduction shape solitary species found spherical spines Spirogyra spores starch statospores structure thallus transverse trichomes Ueber unicellular uninucleate usually valve view vegetative cells Volvocales zoospores zygote