First Results of Studying Pollen Variability of Ephedra dahurica Turcz. in the Modern Climate of Transbaikalia

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Abstract

The study of herbarium materials of the Ephedra dahurica Turcz. collected in the Torey Lakes region in different years, revealed the morphological variability of its pollen grains. An inverse relationship has been established between the development of the number of furrows and ribs of pollen grains and the values of temperature and humidity during the growing season. During wet seasons, the plant produces pollen grains with few furrows. The number of furrows increases during dry and cool growing seasons.

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About the authors

S. A. Reshetova

Vinogradov Institute of Geochemistry of the Siberian Branch of the Russian Academy of Sciences; Institute of Natural Resources, Ecology and Cryology of the Siberian Branch of the Russian Academy of Sciences

Author for correspondence.
Email: srescht@mail.ru
Russian Federation, Irkutsk; Chita

E. V. Bezrukova

Vinogradov Institute of Geochemistry of the Siberian Branch of the Russian Academy of Sciences

Email: srescht@mail.ru
Russian Federation, Irkutsk

M. I. Kuzmin

Vinogradov Institute of Geochemistry of the Siberian Branch of the Russian Academy of Sciences

Email: srescht@mail.ru

Academician of the RAS

Russian Federation, Irkutsk

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Supplementary files

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2. Fig. 1. Overview map of the study area

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3. Fig. 2. Multiborne and multibranch modern pollen grain of Ephedra under electron microscope, photo by [13]

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4. Fig. 3. Appearance of pollen grain of Ephedra dahurica Turcz. A - Pollen grain under electron microscope; B - Pollen grain under light microscope. 1 - equatorial diameter (ED); 2 - polar axis (PA)

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5. Fig. 4. Pollen grains of Ephedra dahurica Ephedra dahurica. View from the pole. Scale line corresponds to 10 µm. 1 - four-bearded; 2, 3, 5 - five-bearded; 4, 6-9 - six-bearded; 10-13 - seven-bearded; 14-16 - eight-bearded; 17 - nine-bearded; 18, 19 - ten-bearded; 20 - sixteen(?)-bearded

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6. Fig. 5. Percentage of different years

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7. Fig. 6. Change in the sum of precipitation and temperature (from data of Solovyovsk meteorological station)

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8. Fig. 7. Correlation graphs of the number of furrows in pollen of Ephedra dahurica Turcz. with atmospheric precipitation of the vegetation period (May-September) and air temperature of the flowering period (May-June)

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