GERMINATION OF ARISTOLOCHIA SEEDS (ARISTOLOCHIACEAE)
Abstract
The seed morphology and germination of 17 Aristolochia species (A. arborea, A. baetica, A. inflata, A. gigantea, A. gracilis, A. clematitis, A. contorta, A. fimbriata, A. labiata, A. littoralis, A. macrophylla, A. manshuriensis, A. maxima, A. rotunda, A. sempervirens, A. tomentosa, A. trilobata) were studied. The highest seed morphometric parameters were observed for A. clematitis, A. contorta, A. trilobata, A. labiata and A. maxima, as well as for all representatives of the section Siphisia, whose seeds had no wings. The seed weight characteristics of species growing in tropical climatic conditions (the Gymnolobus section) were an order of magnitude lower than those of the species of other two sections, growing in temperate climates. The greater weight of seeds studied for the species of Siphisia and Diplolobus sections is associated with the presence of a voluminous endosperm, which enabled the seed to be alive during a long period from dissemination to germination. The period from seed sowing to beginning of germination and length of the germination period are individual for each species, and take from 1 mo. to 3,5 yr. The seeds of the species that grow in the temperate climatic zone (sections Diplolobus and Siphisia) are characterized by a morphophysiological shallow dormancy. They began to germinate 1–11 mos after sowing. Intervals in germination from 2 to 12 mo. were observed for the species of Diplolobus section, after which the seeds continued to germinate. Seeds of the majority of the Gymnolobus section species from the tropics have a morphological type of dormancy and germinate without intervals. The prolonged germination period and non-deep simple morphophysiological dormancy of seeds have adaptive value for the species conservation and survival in situ and ex situ.
About the Authors
O. V. Nakonechnaya
Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences
Russian Federation
Pr. 100 let Vladivostoku 159, Vladivostok, 690022
Russian Federation
Pr. 100 let Vladivostoku 159, Vladivostok, 690022
S. V. Nesterova
Botanical Garden-Institute, Far Eastern Branch of the Russian Academy of Sciences
Russian Federation
Makovskii Str. 142, Vladivostok, 690024
Russian Federation
Makovskii Str. 142, Vladivostok, 690024
N. M. Voronkova
Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences
Russian Federation
Pr. 100 let Vladivostoku 159, Vladivostok, 690022
Russian Federation
Pr. 100 let Vladivostoku 159, Vladivostok, 690022
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Review
For citations:
Nakonechnaya O.V., Nesterova S.V., Voronkova N.M. GERMINATION OF ARISTOLOCHIA SEEDS (ARISTOLOCHIACEAE). Vestnik Moskovskogo universiteta. Seriya 16. Biologiya. 2018;73(4):254-262. (In Russ.)
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