Cytological Observations on Certain Compositae

Cooper, D. C.; Mahony, Kenneth L.

doi:10.1002/j.1537-2197.1935.tb05069.x

Cited by 16 publications

(6 citation statements)

References 12 publications

(3 reference statements)

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“…It has suggested the genetic stability of species even after more than 100 years. But a diploid form of S. oleraceus (2n= 16) and tetraploid (2n= 32) were previously reported by Marchal (1920) and Cooper & Mahony (1935), respectively. More studies had described S. asper as diploid (2n= 18) and S. oleraceus as tetraploid (2n= 32) (Turner et al 1961;Walter & Kutta 1971;Boulos 1972;Hsieh et al 1972;Gupta & Gill 1983;Sidhu et al 2011;Kaur & Singhal 2015).…”

Section: Resultsmentioning

confidence: 72%

A cytomorphological investigation of three species of the genus Sonchus L. (Asterales: Asteraceae) from Punjab, India

Sidhu

Singh

2021

J. Threat. Taxa

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Three species of the genus Sonchus L. (Sonchus asper, S. oleraceus and S. wightianus) were collected from the Malwa region of Punjab during 2019 to 2020. These species were studied for cytomorphological variations. The species under investigation were identified based on their morphological descriptions. Sonchus asper (L.) Hill and Sonchus wightianus DC. possess the same number of chromosomes (2n=2x=18) whereas Sonchus oleraceus (L.) L. is tetraploid with 2n=4x=32 chromosomes. Chromosome number of S. wightianus (2n=2x=18) was worked out for the first time from the state of Punjab. Sonchus olereceus has larger pollens than S. asper and S. wightianus. This study will be useful for researchers, taxonomists and cytologists for accurate identification of these three species.

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Section: Resultsmentioning

confidence: 72%

A cytomorphological investigation of three species of the genus Sonchus L. (Asterales: Asteraceae) from Punjab, India

Sidhu

Singh

2021

J. Threat. Taxa

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“…He considered the disturbances were such as are closely associated with asexual embryo formation. Cooper and Mahony (1935) reported for Gaillardia aristata of the Helenieae one or more pairs of lagging chromosomes on both first division anaphase and after the completion of second division. Other observations of slight irregularities in tribes of the Compositae are by Afzelius (1924) for Senecio alpestris of the Senecioneoe in which 23-25 chromosomes were reported.…”

Section: In the Root-tip Cells Of One Of Two Plants Of Amentioning

confidence: 99%

Chromosome Studies in Liatris. I. Spicatae and Pycnostachyae

Gaiser

1949

American J of Botany

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“…pyrenaicum Tschechow 1931 Maude unpub. Tschechow 1933Tschechow 1932Senn 1938Tschechow 1933Ghimpu 1929Tschechow 1933Ghimpu 1929Tschechow 1933Senn 1938Tschechow 1933D. C. Cooper, 1933Clarke 1934Tschechow 1933Clarke 1934Tschechow 1933 102 110 Church 19296 Avdulov 1928Rau 1929Avdulov 1928Kishinioto 1938Avdulov 1928Kishimoto 1938Avdulov 192S Huskins 1931Ramanujam 193S Parthasarathy 1938Nakajima IQ33 Parthasarathy 1938Nielsen & Humphrey 1937Hunter 1934Parthasarathy 1938Avdulov 1928Hunter 1934Parthasarathy 1938 Kattermann 1932 * The British plants so named are distinct from true A. aristatum Boiss.…”

Section: Arabisunclassified

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1939

New Phytologist

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The Merton Catalogue NOTE The chromosome number given in all cases is zn. References. Usually the latest is given, or, if not, the more important one. In some cases European works are preferred. (A) refers to article on apomixis. (G) refers to article on genetics. (S) refers to article on systematics. (T. 1927, T. 1931), etc., refers to Tischler's lists of chromosome numbers when the information is given there and not otherwise published. The basic number {x) is given after the genus. Many genera are dibasic, (apo) after a genus means that it is apomictic. The nomenclature used is that of the London Catalogue, eleventh edition (1925). A certain number of corrections and additions have, however, been made at Kew. These bring the list more into line with recent work, but no attempt has been made to render it fully correct, either taxonomically or nomenclaturally. A new Students' Flora is in course of preparation, and it was considered unwise to attempt extensive corrections in the London Catalogue names pending its publication. Where the cytological author uses a different name this is given in square brackets, e.g. [as triviale Link.]. Where the eleventh edition of the London Catalogue uses a different name this is given in round brackets, e.g. {Boreana Jord.). A or B after the number of a genus, e.g. 520 A Pholiurus, indicates that the genus has been subdivided and that Pholiurus does not appear in the London Catalogue. Uncounted species are arranged alphabetically. The rest are arranged primarily by chromosome number, secondarily in alphabetic order. The numbers are taken in ascending order, except where there are two or more clear series, e.g. multiples of 7, 8, and 9 in Veronica. 1. CLEMATIS x = 8 Vitalba L. 2. THALICTRUM (apo)* X =7 alpinum L. minus L. fiavum L. dunense Dum. Kochii Fr. majus Crantz RANUNCULACEAE 16 Maude unpub. Schnarf 1929 (A)

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Cytological Observations on Certain Compositae

Cited by 16 publications

References 12 publications

A cytomorphological investigation of three species of the genus Sonchus L. (Asterales: Asteraceae) from Punjab, India

A cytomorphological investigation of three species of the genus Sonchus L. (Asterales: Asteraceae) from Punjab, India

Chromosome Studies in Liatris. I. Spicatae and Pycnostachyae

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