Further observations in embryo sac development in Alchemilla L. [subsection Heliodrosium Rothm.]

• Autorzy: Izmailow R.
• Języki publikacji: EN

Abstrakty

EN

Origin of embryo sacs was examined in further two Alchemilla species: A. acutiloba and A. montícola. The central region of multicellular archesporium shows meiotic tendencies but as a rule, the meiotic division did not advance further than up to I ptophase. Apomeiotic embryo sacs arise from unreduced cells, either from megaspore mother cells (diplospory) or from cells of somatic character (apospory). In the same ovule a few embryo sacs of both types may be formed. Usually only one of them reaches a distinct prevalence and the full maturity.

Słowa kluczowe

EN

embryo sac; apomixia; Rosaceae; megaspore mother cell; apomeiosis; Alchemilla; endosperm; parthenogenesis

• Wydawca: -
• Czasopismo: Acta Biologica Cracoviensia. Series Botanica
• Rocznik: 1994
• Tom: 36
• Opis fizyczny: p.37-41,fig.

Twórcy

autor

Izmailow R.

• Jagiellonian University, Grodzka 52, 31-044 Krakow, Poland

Bibliografia

• Glazunova K. P. 1977. O vozmozhnosti primeneniya teorii agamo-polovogo kompleksa k sistematike pokrytosemennykh rastieniy (na primere roda Alchemilla L.). Byull. Mosk. Obshch. Ispyt. Prirody. Otd. Biol. 82, 129-139.
• Glazunova K. P. 1987. Obrazovaniye zarodyshevykh mieshkov u agamnykh vidov manzhetki (Alchemilla L.). Byull. Mosk. Obshch. Ispyt Prirody. Otd. Biol. 92, 96-110.
• Izmaiłow R. 1986. Cyto-embryological studies on Alchemilla L. (series Calycinae Buser). II. Apomictic processes in ovules. Acta. Biol. Cracov. Ser. Bot. 28, 39-63.
• Mandrik V. Yu. 1976. Embryological studies in some species of the genus Alchemilla L. (in Ukrainian). Ukrain. Bot. Zhum. 33, 476-480.
• Mandrik V. Yu. 1980. Formy apomiksisa u predstaviteley semeystva Rosaceae. Byull. Glavn. Bot. Sada Akad. Nauk SSSR. Izdat. Nauka. Moskva. 116, 86-93.
• Murbeck S. 1901. Parthenogenetische Embryobildung in der Gattung Alchermlla. Lunds Univ. Ȁrsskr. 36, Afd. 2, 7, 1-41.
• Plisko M. A. 1970. Embriologicheskoye izucheniye apomiksisa u predstaviteley Rosaceae i Compositae. In: Apomiksis i selektsiya. lzdat. Nauka. Moskva. 134-141.
• Rutishauser A. 1967. Fortpflanzungsmodus und Meiose apomiktischer Blütenpflanzen. Protoplasmatologia VI (F) 3. Springer Verlag. Wien, New York.
• Smith G. L. 1963. Studies in Potentilla L. I. Embryological investigations into the mechanism of agamospermy in British P. tabernaemontani Aschers. New Phytol. 62, 264-282.
• Strasburger E. 1905. Die Apogamie der Eualchimillen und allgemeine Gesichtpunkte, die sich aus ihr ergeben. Jahrb. Wiss. Bot. 41, 88-164.