Cytotaxonomical study of Draba incana L. from Iceland

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Cytotaxonomical study of Draba incana L. from Iceland. / Ingimundardottir, Groa Valgerdur; Kristinsson, Hörður; Anamthawat-Jónsson, Kesara.

In: Acta Botanica Islandica, Vol. 15, 2011, p. 11-22.

Research output: Contribution to journalArticle

Harvard

Ingimundardottir, GV, Kristinsson, H & Anamthawat-Jónsson, K 2011, 'Cytotaxonomical study of Draba incana L. from Iceland', Acta Botanica Islandica, vol. 15, pp. 11-22.

APA

Ingimundardottir, G. V., Kristinsson, H., & Anamthawat-Jónsson, K. (2011). Cytotaxonomical study of Draba incana L. from Iceland. Acta Botanica Islandica, 15, 11-22.

CBE

MLA

Ingimundardottir, Groa Valgerdur, Hörður Kristinsson and Kesara Anamthawat-Jónsson. "Cytotaxonomical study of Draba incana L. from Iceland". Acta Botanica Islandica. 2011, 15. 11-22.

Vancouver

Author

Ingimundardottir, Groa Valgerdur ; Kristinsson, Hörður ; Anamthawat-Jónsson, Kesara. / Cytotaxonomical study of Draba incana L. from Iceland. In: Acta Botanica Islandica. 2011 ; Vol. 15. pp. 11-22.

RIS

TY - JOUR

T1 - Cytotaxonomical study of Draba incana L. from Iceland

AU - Ingimundardottir, Groa Valgerdur

AU - Kristinsson, Hörður

AU - Anamthawat-Jónsson, Kesara

PY - 2011

Y1 - 2011

N2 - Draba incana L. (Brassicaceae) is an arctic-alpine species which is both common and widely distributed in Iceland. Voucher specimens of D. incana in the ICEL and AMNH herbaria were examined and no major changes in the taxonomic identification or the species distribution map were made. Living plants were collected in this study: nine from Eyjafjördur and Lake Mývatn, northern Iceland, and one from Vatnsendi, southern Iceland. The plants were maintained indoors in the winter and outdoors in the summer. A new morphological feature was discovered in this study – a creeping growth habit forming offshoots, not reported in any major floras examined. This habit was observed in plants on Hrútey Island in Lake Mývatn, and was also detected in one voucher specimen from a different location. The creeping habit was confirmed in the transplanted samples grown indoors. Both groups of plants, i.e. those having normal growth form with erect inflorescences and plants showing creeping growth habit, were used in cytotaxonomical investigation. Chromosomes were prepared from shoot tips and whole seedlings combined, using protoplast dropping method. Both plant groups showed a stable tetraploid chromosome number 2n = 4x = 32. The study not only confirms that D. incana in Iceland is a tetraploid species, but also shows stable chromosome number in morphologically variable material. Cytotaxonomical aspects of Draba are discussed.

AB - Draba incana L. (Brassicaceae) is an arctic-alpine species which is both common and widely distributed in Iceland. Voucher specimens of D. incana in the ICEL and AMNH herbaria were examined and no major changes in the taxonomic identification or the species distribution map were made. Living plants were collected in this study: nine from Eyjafjördur and Lake Mývatn, northern Iceland, and one from Vatnsendi, southern Iceland. The plants were maintained indoors in the winter and outdoors in the summer. A new morphological feature was discovered in this study – a creeping growth habit forming offshoots, not reported in any major floras examined. This habit was observed in plants on Hrútey Island in Lake Mývatn, and was also detected in one voucher specimen from a different location. The creeping habit was confirmed in the transplanted samples grown indoors. Both groups of plants, i.e. those having normal growth form with erect inflorescences and plants showing creeping growth habit, were used in cytotaxonomical investigation. Chromosomes were prepared from shoot tips and whole seedlings combined, using protoplast dropping method. Both plant groups showed a stable tetraploid chromosome number 2n = 4x = 32. The study not only confirms that D. incana in Iceland is a tetraploid species, but also shows stable chromosome number in morphologically variable material. Cytotaxonomical aspects of Draba are discussed.

KW - Brassicaceae

KW - chromosome

KW - polyploid

M3 - Article

VL - 15

SP - 11

EP - 22

JO - Acta Botanica Islandica

T2 - Acta Botanica Islandica

JF - Acta Botanica Islandica

SN - 0374-5066

ER -