Concerning the Duality of the Mitochondria and the Validity of the Osmiophilic Platelets in Plants

Newcomer, Earl H.

doi:10.2307/2437349

Cited by 16 publications

(8 citation statements)

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“…When root tips were amputated from young seedlings and placed in the test solutions, within 10 or 15 min. many of the cells showed the reduced tetrazolium in small granular or rod-shaped regions in the cytoplasm, similar to the mitochondria described in pea root tips by Newcomer (1946) and by Stafford (1951). In some cells larger structures, about 3--4ll.…”

supporting

confidence: 78%

Studies on the Reduction of a Tetrazolium Salt by Green Plant Tissue

Dyar

1953

American Journal of Botany

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supporting

confidence: 78%

Studies on the Reduction of a Tetrazolium Salt by Green Plant Tissue

Dyar

1953

American Journal of Botany

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“…DISCUSSlON.-Whether the chondriome of higher plant cells is essentially dual in nature as held by Guilliermond (1920Guilliermond ( , 1941, Dangeard (1947) , Sorokin (1941 and others or whether the granules. rods and filaments preserved by mitochondrial processing methods cannot be divided into two fundamental classes in regard to ability to develop into plastids as held by Zirkle (J 928), Anderson (1936), Newcomer (1946, 1951), DuBuy et al (1950 among others, is not within the scope of this paper to discuss. However, it seems of interest that all (or nearly all) inclusions of a mitochondrial nature may be small granules in untreated pith cells of seven species of plants and .…”

Section: Ana Treated Tomato Plants-ana In Lanolinmentioning

confidence: 89%

Morphological Variations of Mitochondria in the Presence of Plant Tumors

Fogelberg¹,

Struckmeyer²,

Roberts³

1957

American Journal of Botany

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“…Nine cytological fixing procedures were used in this study. Osmic impregnation methods included that of Kolatchev (Bowen, 1929), a method suggested by Baker (1945), Newcomer's method for osmic impregnation of plant inclusions (Newcomer, 1940), and O'Brien's modification of Zirkle's fixative (O'Brien, 1942) followed by treatment with osmium tetroxide. Aoyama's silver method for Golgi as described by Baker (1945) was also tried..…”

mentioning

confidence: 99%

“…Osmic impregnation following O'Brien's modification of Zirkle's fixative yielded similar results. Although Newcomer's thesis (Newcomer, 1946) relative to the unity of the inclusions of the plant cell is supported mainly by study of vegetative and meristematic cells, the use of Golgi and mitochondrial methods on the sporogenic stages of Onoclea sensibilis appears to furnish additional support to this view.…”

mentioning

confidence: 99%

“…Although this morphological distinctness is no longer evident in the higher plants, the plastid primordia are viewed as genetically separate from the "inactive chondriosomes" which retain their original size after the plastids have become differentiated. Randolph (1922), Zirkle (1927), and Newcomer (1946) have indicated that plastid primordia and mitochondria in meristematic cells are indistinguishable from each other and have described the transformation of these inclusions into plastids. The earlier stages of sporogenesis in Onoclea sensibilis appear to indicate that in these phases, the reverse occurs, with the large, plastid-like inclusions of the young sporangium reverting to the granular mitochondrial inclusions of the spore-mother cell.…”

mentioning

confidence: 99%

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A Study of the Cytoplasmic Inclusions During Sporogenesis in Onoclea sensibilis

Marengo

1949

American Journal of Botany

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tained both filamentous and granular inclusions, while the inclusions of the cells undergoing meiosis were generally granular. A compact mitochondrial plate was formed between the daughter nuclei of the first meiotic division. Senjaninova (1927) described in N ephrodium a similar transformation of rod-like mitochondrial bodies of the earlier stages into granular inclusions of the spore-mother cell. It was stated that in the fully-rounded sporocyte, most of the mitochondria were on one side of the nucleus, as was most of the cytoplasm. At a later stage, a remarkably regular behavior of the granules occurred, and at diakinesis, four distinct groups of granules were observed. Following the separation of the chromosomes at the first meiotic division, the granules formed a compact plate, interposed between the daughter nuclei, in much the same manner as described by Lewitsky in Equisetum. This plate was split by the formation of the cell walls of the newly-formed spores, and as the second division was completed, each spore received approximately one-quarter of the granules. Lenoir (1934) observed essentially the same pattern of behavior on the part of inclusions in living spore-mother cells of Equisetum.Kirby (1928) studied the development of chloroplasts in the spores of Osmunda. This work gives no account of any regular behavior of granules preceding and during meiosis. She states that in Osmunda, the chloroplasts are probably produced from mitochondria which are homologous with those of animals. The production of spores with abnormal pale chloroplasts from normal green sporophyte areas was reported by Andersson (1923) in a study of the genetics of variegation in Adiantum. The cytological history of these abnormal plastids, however, was not described.MATERIALS AND METHoDs.-Materials used in the present study consisted of fertile fronds of Onoclea sensibilis collected at various stages of sporangium formation and sporogenesis. These were treated according to cytological procedures described below, and as far as possible, observations on fixed materials were paralleled by study of living, unstained cells. Nine cytological fixing procedures were used in this study. Osmic impregnation methods included that of Kolatchev (Bowen, 1929), a method suggested by Baker (1945), Newcomer's method for osmic impregnation of plant inclusions (Newcomer, 1940), and O'Brien's modification of Zirkle's fixative (O'Brien, 1942) followed by treatment with osmium tetroxide. Aoyama's silver method for Golgi as described by Baker (1945) was also tried.. The methods used to demonstrate mitochondrial inclusions were those of Regaud (Lee, 1937), Lewitsky (1925), and Huseby (1946). Flemmlng's 603 STUDIES DEALING with the cytoplasmic i\Jclusions of the sporogenous cells, spore-mother cells, and developing spores of the Pteridophyta have appeared with relative infrequence in the botanical and cytological literature. In several of the more detailed accounts published (Lewitsky, 1925; Senjaninova, 1927) the meiotic divisions of the sporemother cel...

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Concerning the Duality of the Mitochondria and the Validity of the Osmiophilic Platelets in Plants

Cited by 16 publications

References 0 publications

Studies on the Reduction of a Tetrazolium Salt by Green Plant Tissue

Studies on the Reduction of a Tetrazolium Salt by Green Plant Tissue

Morphological Variations of Mitochondria in the Presence of Plant Tumors

A Study of the Cytoplasmic Inclusions During Sporogenesis in Onoclea sensibilis

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