First record of chromosome count and cytomixis in an endemic species of Clematis ladakhiana Grey-Wilson (Ranunculaceae) from cold deserts of Jammu and Kashmir

Khan, Nissar Ahmad; Singhal, Vijay Kumar; Gupta, Raghbir Chand

First record of chromosome count and cytomixis in an endemic species of Clematis ladakhiana Grey-Wilson (Ranunculaceae) from cold deserts of Jammu and Kashmir

2018

Khan, Nissar Ahmad | Singhal, Vijay Kumar | Gupta, Raghbir Chand

Meiotic investigations carried out from the cold desert regions of Ladakh (India) record the first ever chromosome count (2n = 32) and cytomixis in Clematis ladakhiana. The phenomenon of cytomixis involving chromatin transfer among 2–6 adjacent pollen mother cells (PMCs) through cytoplasmic channels was observed at different meiotic stages. The chromatin transfer resulted into hypo, hyperploid and enucleated PMCs. Although the frequency of meiocytes involved in chromatin transfer was low it induces abnormalities in chromatin and spindle activity, resulting into some pollen malformation in the form of variable sized fertile and sterile pollen grains. The Majority (86.60%) of the pollen grains observed were large sized, (86.60%) while (7.79%) are relatively small sized.

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Mots clés AGROVOC

chromatin chromosome number clematis cold deserts india indigenous species meiosis pollen pollen grains

Informations bibliographiques

Publié dans

Caryologia

Volume 71 Numéro 3 Pagination 233 - 237 ISSN 2165-5391

Editeur

Taylor & Francis

D'autres materias

Meiotic abnormalities; Cytomixis; Abnormal development; Chromatin transfer; Clematis ladakhiana

Langue

anglais

Note

The authors wish to thank the University Grants Commission, New Delhi (India) for providing financial assistance under the Departmental Research Support Special Assistance Programme I, II and III, the assistance for strengthening of infrastructure for science and technology programme, Junior Research Fellowship to Nissar Ahmad Khan under DBT- I.P.L.S project [award letter number 12019/Research-29/01/2015].

Type

Text; Journal Article

Sur AGRIS depuis: 2024-02-28

Format: MODS

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Cette notice bibliographique a été fournie par National Agricultural Library

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Liens

DOI http://dx.doi.org/10.1080/00087114.2018.1460520

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