The Behavior of Meiotic Prophase Chromosomes as Revealed Through the Use of High Temperatures

Swanson, C. P.

doi:10.1002/j.1537-2197.1943.tb14782.x

Cited by 19 publications

(7 citation statements)

References 18 publications

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“…(5) high temperatures (Swanson, 1943); (6) after X-rays (Manton, 1945b); (7) ammonia vapour (Kuwada & Nakamura, 1934, etc. ); (8) ammonia in alcohol (Sax & Humphrey, 1934, etc.…”

Section: Methods Of Demonstrationmentioning

confidence: 99%

“…Except for TrilZium, in which direct observation of the origin of the major spiral has been claimed (Swanson 1942;Huskins & Smith, 1935), the order of formation of the major and minor spirals is a matter for speculation. Some authors, notably Kuwada & Nakamura (1933, 1934, Darlington (1935), Swanson (1942Swanson ( , 1943, have thought that the major spiral forms first and the minor after it, but other authors, for example , Naithani (1937), and Coleman & Hillary (1941), have interpreted the two in the reverse order; in neither case is conclusive evidence available.…”

Section: The Minor Spiralmentioning

confidence: 99%

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The Spiral Structure of Chromosomes

Manton¹

1950

Biological Reviews

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Summary . i. Sufficient examples of spiral structure of chromosomes are now known from dicotyledons, monocotyledons, pteridophytes and perhaps gymnosperms, together with some animals, to show that the phenomenon is a fundamental one in the plant and animal kingdoms, at least in the higher groups. 2. Various methods found to be effective for revealing the spiral are listed, though the spiral itself cannot be an artifact. 3. Since 1939, new observations have been made on the following principal topics: (a) chromonema length; (b) direction of coiling, especially in a somatic chromosome; (c) prophase development leading to generalizations about ‘gyre elimination’ as a normal part of the spiralization cycle; (d) geometrical form of the spiral. 4. Unification of terminology is recommended by general adoption of the terms plectonemic and par anemic to describe the geometrical form of the spiral. The term ‘standard coil’ is recommended to replace ‘minor spiral’ for contrasting the major spiral with those of other types of division. 5. The need is stressed for further evidence on the minor spiral in the strict sense. 6. The importance of the interpretation of the ‘telophase split’ and of the origin of relational coiling for an understanding of the functional importance of the whole phenomenon of spiral structure is stressed. The suggestion made in earlier publications is repeated that the functional significance of the spiral might be that of co‐ordinating the component strands of a chromosome so that these may act in a unified manner when outside the resting nucleus.

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“…(5) high temperatures (Swanson, 1943); (6) after X-rays (Manton, 1945b); (7) ammonia vapour (Kuwada & Nakamura, 1934, etc. ); (8) ammonia in alcohol (Sax & Humphrey, 1934, etc.…”

Section: Methods Of Demonstrationmentioning

confidence: 99%

Section: The Minor Spiralmentioning

confidence: 99%

The Spiral Structure of Chromosomes

Manton¹

1950

Biological Reviews

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“…stage. Among the published works that were used in interpreting these stages are papers by Swanson (1943), Hiraoka (1941), and Nebel and Ruttle (1936). However, the complete pairing observed [Vol.…”

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confidence: 99%

The Duration of Differentiation in Excised Anthers

Taylor

1950

American J of Botany

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“…Temperature effects on chromosome con traction have been described by Matsuura (1935Matsuura ( , 1937, Straub (1937), Huskins and Wilson (1938), Wilson and Huskin (1939), Barber (1940), Darlington and LaCour (1940), Swanson (1942Swanson ( , 1943, Wilson and Boothroyd (1944), Jain (1957) and Rees (1958). Genotypic control of chromosome length has also been known for many years (Lesley and Frost 1927, Lamm 1936, Upcott 1937, Swanson 1942, 1943, Burnham 1946). Differences at the cell level are due mainly to differences in stage advancement, differences in treatment during slide preparation which are not found at the slide level and to internal differences in cellular environment which have the same general pattern of distribution in all anthers (for example, differences in position of the various chromosomes with respect to each other might conceivably influence contrac tion rate).…”

Section: Resultsmentioning

confidence: 96%

Variability in Length and Arm Ratio of the Pachytene Chromosomes of Corn

Maguire¹

1962

CYTOLOGIA

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The Behavior of Meiotic Prophase Chromosomes as Revealed Through the Use of High Temperatures

Cited by 19 publications

References 18 publications

The Spiral Structure of Chromosomes

The Spiral Structure of Chromosomes

The Duration of Differentiation in Excised Anthers

Variability in Length and Arm Ratio of the Pachytene Chromosomes of Corn

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