Seed propagation in four perennial species of Astragalus (Leguminosae: Papilionoideae: Galegeae): productivity, nonrandom seed abortion and germination rate

Sinjushin, A.A.

Автор: Sinjushin A.A.
Журнал: Wulfenia
Том: 28
Год издания: 2021
Издательство: Botanischer Garten des Landes Karnten
Местоположение издательства: Austria
Первая страница: 211
Последняя страница: 222
Аннотация: The largest angiosperm genus Astragalus exhibits a wide range of morphological variation regarding flowers, inflorescences and especially pods. As a result, some of its species are widely distributed, while others are local endemics and often threatened. It is of significant interest to trace features which provide a higher success for some species under conditions where their relatives are depressed. Four perennial species of Astragalus from the central Russia served as models for this comparative survey, viz. A. cicer, A. glycyphyllos, A. arenarius, and A. danicus. Two former species are widely distributed and rarely included into the regional Red Lists, while two latter are comparatively rare and considered endangered in several regions. Only a relatively small fraction of ovules develops into fully mature seeds in all four species. Basing on the results of comparative study, it was hypothesized that the main sources of prosperity are a high potential productivity (measured as a number of ovules per seasonal shoot) and pronounced seed dormancy, typically physical. A number of produced ovules is substantially dependent on inflorescence morphology. The feature common for all examined species of Astragalus and distinguishing for the whole genus is unusual biseriate arrangement of ovules in an ovary, which is probably adaptive for many-seeded fruits exhibiting nonrandom seed abortion.
Добавил в систему: Синюшин Андрей Андреевич

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Seed propagation in four perennial species of Astragalus (Leguminosae: Papilionoideae: Galegeae): productivity, nonrandom seed abortion and germination rateстатья

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