The Life-cycle of &lt;i&gt;Streptomyces griseoflavus&lt;/i&gt;

Saito, Hiuga; Ikeda, Yōnosuke

doi:10.1508/cytologia.23.496

Cited by 6 publications

(4 citation statements)

References 11 publications

(5 reference statements)

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“…The two strains considered here, as well as other members of the Actinoplanaceae that have undergone preliminary observation, all exhibited striking similarity in structure and distribution of the chromatinic bodies to that reported for members of the Streptomycetaceae (Badian, 1936;Klieneberger-Nobel, 1947;Saito & Ikeda, 1958;Hopwood & Glauert, 1960;Shamina, 1964). This similarity between the chromatinic bodies of members of the Actinoplanaceae and those of the Streptomycetaceae corresponds with results reported by Couch (1954).…”

Section: Dis Cuss10 Nsupporting

confidence: 64%

Observations on the Chromatinic Bodies of Two Species of the Actinoplanaceae

Bland

Couch

1968

Journal of General Microbiology

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The structure and distribution of the chromatinic bodies of two species of the genus Actinoplanes were studied with light microscopy. Results obtained from observation of material stained by the technique of DeLamater (rggr), Feulgen (Rafalko, I 946), or PiCchaud (1954), were supplemented by observation of living material. A technique for observing living and stained preparations with phase-contrast or dark-field microscopy gave results far superior to those obtained with bright-field microscopy. Both strains studied had a nearly identical structure and distribution of chromatinic bodies. Colonies consisted of two hyphal types; substrate hyphae and palisade hyphae (Couch, 1950). The chromatinic bodies of the substrate hyphae appeared variously as short rods or as small bands of material that extended across the width of the hyphae. The palisade hyphae contained bodies ranging from dumb-bell shaped structures to multiple entities composed of 3-4 interconnected subunits. The distal portions contained dense rods of chromatinic material. The chromatinic rods of the palisade hyphae progressed into the sporangium along with the ingrowth of the sporogenic hyphae into the sporangial envelope. Within the sporangium these rods appeared to contract and undergo repeated divisions into smaller subunits; a single subunit was incorporated into each spore. A striking similarity in structure and distribution of the chromatinic bodies was noted between members of the Actinoplanaceae and members of the Streptomycetaceae.

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Section: Dis Cuss10 Nsupporting

confidence: 64%

Observations on the Chromatinic Bodies of Two Species of the Actinoplanaceae

Bland

Couch

1968

Journal of General Microbiology

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“…The different appearances of the chromatinic bodies in different parts of the colony were related to one another by reference to the cycle of development of the organism as seen in the phase-contrast microscope (Hopwood, 1960). This investigation of the chromatinic bodies provides a background for the interpretation of the appearance of the nuclear material in electron micrographs of thin sections (Hopwood and Glauer~, 1960), and also helps to resolve some of the confusion in the literature over certain aspects of the behaviour of the chromatinic bodies of streptomycetes (Badian, 1936;Klieneberger-Nobel, 1947;Saito and Ikeda, 1958).…”

Section: Introductionmentioning

confidence: 98%

OBSERVATIONS ON THE CHROMATINIC BODIES OF Streptomyces coelicolor

Hopwood¹,

Glauert²

1960

The Journal of Cell Biology

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Colonies of Streptomyces coelicolor growing on cellophane and impression preparations from sporing colonies were stained for chromatin by the methods of Feulgen, DeLamater (1951), and Pi6chaud (1954). The chromatinic bodies of the substrate hyphae have a great variety of configurations. During the devclopment of the spores, elongated chromatinic structures in the young aerial hyphae separate into a number of subunits and a single round chromatinic body is included in each spore.

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“…NUCLEAR STRUCTURE and behavior in Streptomyces and Actinomyces have been studied intensively for several decades (Badian, 1934;von Plotho, 1940;Carvajal, 1947;Klieneberger-Nobel, 1947;McGregor, 1954;Saito and Ikeda, 1958;Hopwood and Glauert, 1960a, 1960biChen, 1964. It has been maintained repeatedly that chromosomes occur in Streptomyces even though the cytological evidence is inconclusive.…”

mentioning

confidence: 99%

“…In Escherichia coli, Conti and Gettner (1962) point out that the fibrils are generally thought to represent a DNA complex. The nuclear region in Streptomyces has been shown to give a positive Feulgen reaction and it is, therefore, generally believed that DNA in Streptomyces is contained in the nuclear region (Saito and Ikeda, 1958;Hopwood and Glauert, 1960a). Since in the nuclear region of S. cinnamonensis, as shown by its 8-day culture, it is the fibrils that exhibit the aggregation and separation characteristic of DNA in higher forms, it appears reasonable to suggest that the nuclear fibril in S. cinnamonensis is related to nucleoprotein components.…”

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confidence: 99%

Observation of the Nuclear Behavior in Streptomyces Cinnamonensis

Chen

1966

American J of Botany

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The nuclear region in the hyphae of Streptomyces cinnamonensis consists of two phases: a dense fibrillar phase and a less dense phase in which the fibrillar phase is embedded. The fibrillar phase occurs in two states of aggregation, a dispersed condition in which a network of fine fibrils is apparent and a more organized condition in which the fibrils appear thicker and more compact and exhibit a variety of configurations. The fibrils may be dispersed throughout the nuclear region, either in a whorled pattern or in a more or less straightened manner aligned along the nuclear axis. They may aggregate toward the center of the nuclear region as a dense mass which may be separated into two daughter groups of fibrils. Often the nuclear region between the two daughter groups of fibrils is subdivided by cytoplasmic invagination. Conversely, the two daughter groups of fibrils divide a second time resulting in four masses of fibrils. Thus several nuclear regions may be located in a common cytoplasmic field. The significance of these findings is discussed.

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The Life-cycle of <i>Streptomyces griseoflavus</i>

Cited by 6 publications

References 11 publications

Observations on the Chromatinic Bodies of Two Species of the Actinoplanaceae

Observations on the Chromatinic Bodies of Two Species of the Actinoplanaceae

OBSERVATIONS ON THE CHROMATINIC BODIES OF Streptomyces coelicolor

Observation of the Nuclear Behavior in Streptomyces Cinnamonensis

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