| Authors |
Godin Vladimir Nikolaevich, Doctor of biological sciences, professor, sub-department of botany, Moscow Pedagogical State University (1 building, 1 Malaya Pirogovskaya street, Moscow, Russia), E-mail: godinvn@yandex.ru
Dozorova Svetlana Vladimirovna, Master’s degree student, Moscow Pedagogical State University (1 building, 1 Malaya Pirogovskaya street, Moscow, Russia), E-mail: sveta_73_1993@mail.ru
Arkhipova Tat'yana Valentinovna, Candidate of agricultural sciences, associate professor, sub-department of botany, Moscow Pedagogical State University (1 building, 1 Malaya Pirogovskaya street, Moscow, Russia), E-mail: tata50509@mail.ru
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| Abstract |
Background. Nowadays many researchers pay attention to the adaptive significance of inflorescence architecture in presenting flowers in space and time and their impact on mating systems. Our aim is to identify consistent pattern of flowering sequences in Aegopodium podagraria L. regulating the degree of sexual phase overlaps within and between the different flowers and umbels in the synflorescence.
Materials and methods. Observations were made in natural populations in Moscow region. Individuals of A. podagraria were monitored between 2014 and 2018 throughout the flowering period. Developmental stages were recorded at least two
times a week.
Results. A. podagraria is plant with diurnal rhythm blooming flowers which are blooming 2–6 days that depends on flowers position in umbels and synflorescence. Flowers are protandrous with a centripetal flowering sequence in the umbels and umbellets. Due to a variable sterile phase in each flower, male and female phases remain separated in the umbels. Due to successive flowering the lateral branches are multicycle protandrous. First-order umbels open divergently, as proximal shoots often flower delayed. These retarded flowering umbels interfere with the general sex separation and cause phase overlaps. Therefore, on the plant level, flowering is not strictly multicycle protandrous (models of flowering is “Chaerophyllum prescottii”).
Conclusions. Strongly expressed intra-flowering protandry in A. podagraria significantly reduces the risk of autogamy. Nevertheless, the presence of inter-flowering homogamy (simultaneous functioning of flowers in the male and female phases on branches of different branching order) does not exclude the possibility of geitonogamy within synflorescence between different umbels.
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