Two types of constitutive heterochromatin in the chromosomes of some Fritillaria species

Cour, L. F. La

doi:10.1007/bf00285649

Cited by 30 publications

(12 citation statements)

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“…Different classes of heterochromatin have been reported among plants (Vosa 1970, LaCour 1978. HCl-Giemsa banding is also known to visualize most of the types of heterochromatin on chromosomes (Joshi and Ranjekar 1982) .…”

Section: Discussionmentioning

confidence: 99%

Interphase nuclear structure and heterochromatin in Cicer species.

Kabir

Singh

1989

CYTOLOGIA

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Interphase nuclear structure has been investigated using various techniques of light , phase contrast, fluorescence and electron microscopy . These studies have indicated several interest ing features of the interphase nuclei (once thought to be resting nucleus) like non -random ar rangement of chromosomes, somatic association and specific orientation of chromosomes maintaining their telophasic configurations (Patankar and Ranjekar 1984) . Interphase nuclear organization of plants is species specific , however, it's determinants are not clearly known, al though the role of nuclear DNA content and repititive DNA sequences has been suggested (Lafontaine 1974, Nagl andFusenig 1979). To study interphase nuclei BSG-technique has been applied for heterochromatin visualization in many monocotyledonous plants . Among dicotyledons, interphase nuclear structure has been studied in Anemone (Marks and Schweizer 1974). However, recently interphase nuclear structure in five dicots (Joshi and Ranjekar 1982) and in five species of Phaseolus (Patankar and Ranjekar 1984) has been studied using the HCl -Giemsa technique.Thus the aim of present investigation was to study the interphase nuclear structure and heterochromatin in meristematic and differentiated cells of six Cicer species employing two different staining techniques and also to know the role of nuclear DNA content in structural organization of interphase nuclei.

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Section: Discussionmentioning

confidence: 99%

Interphase nuclear structure and heterochromatin in Cicer species.

Kabir

Singh

1989

CYTOLOGIA

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“…kamtschaticum (2n= 2x= 10, K1K1) (Vosa 1970, 1973, 1976, Fiskesjo 1974, Stack et al 1974, Greilhuber 1975, Yen and Filton 1977, Greilhuber and Speta 1978, La Cour 1978, Sato et al 1979, Deumling and Greilhuber 1982 present findings, and the cold-sensitive regions of T. kamtschaticum chromosomes might be AT-rich constitutive heterochromatin. A comparison of cold-sensitive and Giemsa-positive segments of chromosomes was made for the first time in both T. apetalon and T. tschonoskii.…”

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confidence: 50%

Comparison of Cold-sensitive and C-banded Segments of Chromosomes in Trilliums.

Uchino

Wang

1996

CYTOLOGIA

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“…Our data are extremely similar to those obtained by Mayfield & Enison (1975) who presented cytological evidence that heterochromatin is condensed into distinct and closely located masses with fluorescent differential intensity in intercinetic nuclei of Drosophila virilis and Samoaia leonensis. It is interesting, moreover, that La Cour (1978) showed a similar behaviour of C-banding in metaphase chromosomes of some species of FritiUaria and proposed the possibility that the two classes of staining reactions represent two types of heterochromatin.…”

Section: Discussionmentioning

confidence: 99%