THE FEATURES OF GYNODIOECIOUS FLOWERING AJUGA REPTANS (LAMIACEAE) IN MOSCOW REGION 

Godin Vladimir Nikolaevich, Doctor of biological sciences, associate professor, professor of the sub-department of botany, Moscow Pedagogical State University (1 building, 1 Malaya Pirogovskaya street, Moscow, Russia), E-mail: godinvn@yandex.ru
Kuranova Nataliya Gennadievna, Candidate of biological sciences, associate professor, sub-department of botany, Moscow Pedagogical State University (1 building, 1 Malaya Pirogovskaya street, Moscow, Russia), E-mail: nkuranova@inbox.ru
Akhmetgarieva Liliya Radikovna, Student, Moscow Pedagogical State University (1 building, 1 Malaya Pirogovskaya street, Moscow, Russia),E-mail: akhmetgarievaliliya@mail.ru 

581.461: 582.929: 57.017.55 

DOI

10.21685/2307-9150-2020-3-2 

Background. In gynodioecious species, populations of two types of individuals are found – bisexual and female. The morphological and biological characteristics of these two morphs are different. A. reptans is an example of a gynodioecious species. However, information about the flowering biology of both its sexual forms is extremely fragmented. The aim of our research is to study the flowering of A. reptans’ bisexual and female morphs in the Moscow region.
Materials and methods. Anthecological observations were made in natural conditions in the Moscow region from 2015 to 2019 according to generally accepted methods.
Results. The floral unit of A. reptans is the apical open bracteose thyrsus, which has constituent elements of 3 or 5 flower cymoids. In lateral dichasium, the flower opens acropetally; in the thyrsus, flowers on the axis bloom almost simultaneously. Bisexual flowers of A. reptans are characterized by a weak protandry. Bisexual and pistillate flowers have a long lifespan, surviving for 12–13 days without pollination. A. reptans is characterized by a daily flowering rhythm, with two maximums at 9 a.m and 12 a.m. Bisexual and pistillate flowers open simultaneously.
Conclusions. A number of anthecological characters of A. reptans demonstrate that it flowers in spring: the lack of a clear acropetal sequence in the order of flowers blooming in a thyrsus, the long lifespan of both bisexual and pistillate flowers, the opening of flowers during almost all daylight hours, and a fairly short flowering period, due to the need for development in a strictly defined period of vegetation. 

Key words

Ajuga reptans, gynodioecy, flowering 

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1. Dem'yanova E. I. Botanicheskiy zhurnal [Botanical journal]. 1985, vol. 70, no. 10, pp. 1289–1301. [In Russian]
2. Godin V. N. Botanicheskiy zhurnal [Botanical journal]. 2019, vol. 104, no. 5, pp. 669–683. [In Russian]
3. Godin V. N. Botanicheskiy zhurnal [Botanical journal]. 2020, vol. 105, no. 3, pp. 236–252. [In Russian]
4. Delph L. F., Lively C. M. Oikos. 1992, vol. 63, no. 2, pp. 161–170.
5. Eckhart V. M. Evolutionary Ecology. 1991, vol. 5, pp. 370–384.
6. Godin V. N., Kuranova N. G. Vestnik Permskogo universiteta. Ser.: Biologiya [Bulletin of Perm University. Series: Biology]. 2018, iss. 4, pp. 343–350. [In Russian]
7. Godin V. N., Kuranova N. G., Sergeeva E. O. Rastitel'nyy mir Aziatskoy Rossii [The flora of Asian Russia]. 2020, no. 1 (37), pp. 32–39. [In Russian]
8. Gogina E. E. Byulleten' Glavnogo botanicheskogo sada [Bulletin of the Main Botanical Garden]. 1970, iss. 77, pp. 64–71. [In Russian]
9. Dem'yanova E. I. Vestnik Permskogo universiteta. Ser.: Biologiya [Bulletin of Perm University. Series: Biology]. 2016, no. 3, pp. 193–204. [In Russian]
10. Dem'yanova E. I. Vestnik Permskogo universiteta. Ser.: Biologiya [Bulletin of Perm University. Series: Biology]. 2017, no. 2, pp. 135–144. [In Russian]
11. Elzinga J. A., Varga S. Flora. 2017, vol. 226, pp. 72–81.
12. Gordeeva N. I. Botanicheskiy zhurnal [Botanical journal]. 2020, vol. 105, no. 3, pp. 293–299. [In Russian]
13. Teteryuk L. V., Dymova O. V., Golovko T. K. Ekologiya [Ecology]. 2001, no. 3, pp. 209–215. [In Russian]
14. Godin V. N., Akhmetgarieva L. R. Botanicheskiy zhurnal [Botanical journal]. 2019, vol. 104, no. 8, pp. 1211–1227. [In Russian]
15. Knuth P. Handbuch der Blütenbiologie [Handbook of flower biology]. Leipzig, 1898, vol. II, t. I, 697 p.
16. Ponomarev A. N. Polevaya geobotanika [Field geobotany]. Moscow; Leningrad, 1960, vol. 2, pp. 9–19. [In Russian]
17. Robinsohn I. Sitzungsberichte der Akademie der Wissenschaften mathematisch-naturwissenschaftliche Klasse [Session reports of the Academy of Sciences, mathematical and scientific class]. 1924, vol. 133, pp. 181–211.
18. Troll W. Die Infloreszenzen [The inflorescences]. Jena, 1964, vol. 1, 614 p.
19. Owens S. J., Ubera-Jimenez J. L. Advances in Labiatae Science. London: Kew, 1992, pp. 257–280.
20. Antonova L. A. Ekologiya opyleniya [Pollination ecology]. Perm: Izd-vo Permskogo un-ta, 1976, iss. 2, pp. 30–63. [In Russian]
21. Antonova L. A. Ekologiya [Ecology]. 1972, no. 4, pp. 74–79. [In Russian]
22. Antonova L. A. Vestnik Leningradskogo gosudarstvennogo universiteta [Bulletin of Leningrad State University]. 1973, no. 3, pp. 28–35. [In Russian]
23. Goryshina T. K. Botanicheskiy zhurnal [Botanical journal]. 1972, vol. 57, no. 5, pp. 446–456. [In Russian]
24. Komarova T. A. Byulleten' Moskovskogo obshchestva ispytateley prirody. Otdel biologicheskiy [Bulletin of the Moscow Society of Naturalists. Biological department]. 1986, vol. 91, iss. 4, pp. 46–53. [In Russian]
25. Serebryakov I. G. Vestnik Moskovskogo universiteta [Bulletin of Moscow University]. 1946, iss. 6, pp. 75–108. [In Russian]