Cell Ultrastructure of Mirovia macrophylla (Florin) Nosova (Pinopsida) from the Lower Cretaceous of Yakutia

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Abstract

The article presents the results of cytochemical and anatomical studies of the conifer leaf of Mirovia macrophylla from the Lower Cretaceous of the Lena Coal Basin in Yakutia. For the first time, the presence of cells with preserved nuclei was revealed for an early Cretaceous conifer, but in the nuclear chromatin the DNA-deoxyribose skeleton, which serves as a target for the Schiff reagent during the Feulgen reaction, was not preserved. Chloroplasts with a thylakoid system were also found in the leaf cells, and inclusions were observed in the chloroplasts, with the larger ones likely being starch grains and the smaller ones being plastoglobuli. In some cells, grooved globules were found, presumably tannins.

About the authors

I. A Ozerov

Komarov Botanical Institute of RAS

Email: igorozerov@mail.ru
St. Petersburg, Russia

N. A Zhinkina

Komarov Botanical Institute of RAS

St. Petersburg, Russia

A. A Torshilova

Komarov Botanical Institute of RAS

St. Petersburg, Russia

N. K Koteyeva

Komarov Botanical Institute of RAS

St. Petersburg, Russia

N. V Nosova

Komarov Botanical Institute of RAS

St. Petersburg, Russia

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