Morphology of spores and chromosome count in Pteridium pinetorum subsp. sibiricum (Dennstaedtiaceae) | Sistematicheskie zametki po materialam Gerbariya im. P.N. Krylova Tomskogo gosudarstvennogo universiteta - Systematic notes on the materials of P.N. Krylov Herbarium of Tomsk State University. 2024. № 130. DOI: 10.17223/20764103.130.3

Morphology of spores and chromosome count in Pteridium pinetorum subsp. sibiricum (Dennstaedtiaceae)

The scanning electron microscopy study (SEM) of spores of Pteridium pinetorum C.N. Page et R.R. Mill subsp. sibiricum Gureyeva et C.N. Page was carried out. Spores examined species are trilete, tetrahedral, small, 25,9-36,3 *23,0-31,8 pm with hemispherical distal side and convex of proximal side. The visible parts of the laesura arms are equal to half the spore radius, the peripheral parts in the corners of the spore are obscured by granular deposits. The perispore is thin with a fine-meshed reticulate sculpture formed by thin filaments and almost obscured by irregular and densely granular deposits. The chromosome count was determined in the mother cells of spores at the stage of the first division of meiosis. This method determines the haploid chromosome count (n) since at these stages the chromosomes are represented by bivalents. The chromosomes in Pteridium pinetorum subsp. sibiricum are small, the haploid chromosome count is n = 52.

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Keywords

chromosome count, scanning electronic microscopy (SEM), spore morphology, Pteridium, Dennstaedtiaceae

Authors

Name	Organization	E-mail
Gureyeva Irina I.	Tomsk State University	gureyeva@yandex.ru
Mitrenina Elizaveta Yu.	Tomsk State University
Kuznetsov Alexander A.	Tomsk State University
Romanets Roman S.	Tomsk State University

Всего: 4

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