Investigation on karyotype, 4C nuclear DNA amount and interphase nuclear volume (INV) of different Himalayan Bupleurum species belonging to Umbelliferae revealed genetic differentiation. Numerical and structural alternation of chromosomes in interspecific level were manifested in their statistically significant altered species specific 4C nuclear DNA content. Somatic chromosome number ranged between 2n = 14 and 2n = 16. B. himalayense was reported for the first time having 2n = 16 chromosomes. Correlation coefficient among the various chromosomal and nuclear parameters showed no significant progressive or regressive interdependence except in between INV and nuclear DNA amount. Critical differences between 4C DNA content showed interspecific variation. © 1993 Institute of Experimental Botany.

A B DAS

R MALLICK

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Karyotype diversity and interspecific 4C DNA variation inBupleurum

Biologia Plantarum

In vitro regeneration of Cymbopogon polyneuros Stapf was obtained through callus culture using leaf base, node, and root as explants. Callus was induced from different explants with 2–5 mg/1 α-naphthalene acetic acid (NAA) and 1–2 mg/1 kinetin in Murashige and Skoog's (MS) basal medium. High frequency shoots were noticed from leaf-base callus supplemented with 3.5 mg/1 6-benzylaminopurine (BA), L-arginine, adenine, and a low level of NAA (0.2 mg/1). About 80–85 shoot buds were obtained from ca. 200 mg of callus per culture. The individual shoots produced root in the presence of 0.5–3 mg/1 indole 3-butyric acid or its potassium salt. Regenerated plants were cytologically and phenotypically stable. Regenerants were transplanted into soil and subsequently transferred to the field. © 1999 Taylor & Francis Group, LLC.

Israel Journal of Plant Sciences

Effects of different physiochemical factors on regeneration of cymbopogon polyneuros stapf via callus culture and subsequent chromosomal stability

A detailed karyotypic analysis and cytophotometric estimation of 4C DNA amount was carried out in six species of the subtribe Carinae of Umbelliferae. Intergeneric and interspecific chromosome number viz., 2n=14, 18, 20, 22 were varied in the subtribe level. Critical analysis of chromosome morphology revealed the structural alteration of chromosomes along with their changed DNA amount. Significant variation of DNA amount having numerical, gross or minor chromosomal alteration leads to the genetic drift in between the species of the subtribe suggesting the compromise between the structural and biochemical changes of the genome during macro- and micro-evolution. © 1991, Japan Mendel Society, International Society of Cytology. All rights reserved.

Fulltext

CYTOLOGIA

Genome Analysis and Variation of 4c DNA Content in the Subtribe Carinae

The species Cuminum cyminum L. and Carum copticum Benth. and Hook, belong to the subtribe Carinae of the tribe Ammineae of Umbelliferae (Drude 1898). Carum copticum commonly called as ‘ajwin’, is reported to be the native of Egypt. Its seeds are a commercial source of essential oil which mainly contains 40-45 per cent of thymol, chiefly used in the pharmaceutical industry. The seeds are also used as a spice or condiment. Seeds of Cuminum cyminum (Cumin) have an aromatic odour and are extensively used as condiment. Both the species are widely cultivated throughout the world for their economic values. Cytological studies on these two species were carried out ealier by several authors (Shah 1953, Sharma and Ghosh 1954, Baijal and Kaul 1973, Hore 1975, Khanolkar 1977, Subramanian 1986). However, karyotypic details including cryptic difference, if any, at the varietal level and the nuclear DNA value are not available. These data provide with an understanding of inter- and intraspecific affinities and the mode of evolution. © 1990, Japan Mendel Society, International Society of Cytology. All rights reserved.

Chromosome Studies and Estimation of Nuclear DNA in Different Varieties of Cuminum cyminum L. and Carum copticum Benth. and Hook

Extensive karyological analysis including determination of somatic chromosome number, total chromosome length and volume and estimation of 4C DNA amount were carried out on 8 different varieties of Coriandrum sativum L. A significant variation in nuclear DNA amount was recorded in the varietal level. The structural alteration of chromosome as well as loss or addition of highly repetitive sequences in the genome have played a vital role in intervarietal DNA variation. The absence of wide differences in nuclear DNA content in the varietal level indicate a close relationship between them. © 1989, Japan Mendel Society, International Society of Cytology. All rights reserved.

Variation in 4C DNA Content and Chromosome Characteristics in Different Varieties of Coriandrum Sativum L

Karyotype analysis of three varieties of Indian fennel (Foeniculum vulgare Mill.) revealed that minute structural alteration of chromosomes associated with variation of 4C DNA content, genomic chromosome length and genomic chromosome volume has played an important role in establishment of new cultivated varieties. © 1989, Japan Mendel Society, International Society of Cytology. All rights reserved.

Variation in karyotype and nculear DNA content in different varieties of foeniculum vulgare mill

The genera Maranta and Calathea are mostly tropical American in origin, though widely cultivated throughout the tropical zone of the globe for ornamentation of leaves, excepting the arrowroot yielding species of Maranta. In India, because of wide cultivation, they are often located as wild in the forest, though apparently as dispersed forms from the cultivated types. The vegetative propagation of the species is profuse preferring comparatively shady conditions. Despite its economic value, and the fact that the almost absence of sexual reproduction provides ideal materials for the study of speciation, data on the structure and behaviour of chromosomes of the genera Calathea, Maranta and Stromanthe are rather meagre (Venkatasubban 1946, Simmonds 1954, Sharma and Bhattacharyya 1958, Sato 1960, Mahanty 1970, Mukhopadhyay and Sharma 1984, Sharma and Mukhopadhyay 1984). The available records indicate that there are aneuploid chromosome numbers in these genera, of which 11 has been considered as the deep seated number (Sharma and Bhattacharyya 1958). These eleven chromosomes are regarded as derivatives of a basic set of four chromosomes with a long antecedent period of evolution. In view of the scanty records on these genera as well as the scope of various approaches including the analysis of chromosome structure, the present study was undertaken. It includes the study of morphological and anatomical characters, along with a detailed analysis of the chromosomes, the range in chromosome length, volume and classification of the finer details at the microscopic level. The relationship of these features with the amount of nuclear DNA has earlier been reported (Sharma and Mukhopadhyay 1984). © 1987, Japan Mendel Society, International Society of Cytology. All rights reserved.

Journal	Data powered by TypesetBiologia Plantarum
Publisher	Data powered by TypesetSpringer Netherlands
ISSN	0006-3134