Intraindividual variability of endosperm in autonomously apomictic Chondrilla juncea L.

• Autorzy: Koscinska-Pajak M.
• Języki publikacji: EN

Abstrakty

EN

The data concerning endosperm type in Chondrilla juncea L. from Europe, Asia and Australia have been the subject of controversy. This study investigated the problem embryologically in an individual plant growing on an experimental field. Two endosperm types, nuclear and cellular, were observed to be present in inflorescences of the same plant. Both types of endosperm were formed after open pollination as well as after emasculation; however, cellular endosperm predominated slightly after open pollination. The development of endosperm preceded embryo development independently of endosperm type. Intraspecific variability of endosperm type in the investigated plant seems to be genetically conditioned, and it may be modified by external conditions.

Słowa kluczowe

EN

embryo sac; apomixia; Australia; autonomous endosperm; open pollination; emasculation; Europe; Chondrilla juncea; Asia

• Wydawca: -
• Czasopismo: Acta Biologica Cracoviensia. Series Botanica
• Rocznik: 1998
• Tom: 40
• Opis fizyczny: p.69-73,fig.

Twórcy

autor

Koscinska-Pajak M.

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

Bibliografia

• Battaglia, E. 1980. Embryological questions: 2. Is the endosperm of angiosperms sporophytic or gametophytic? Annali di Botanica 39: 9-30.
• Cuthbertson, E. G.1974. Seed development in Chondrilla juncea L. Australian Journal of Botany 22: 13-18.
• Czapik, R. 1991. Some research problems of the endosperm in Angiospermae. Polish Botanical Studies 2: 109-120.
• Czapik, R. 1996. Problems of apomictic reproduction in the families Compositae and Rosaceae. Folia Geobotánica et Phytotaxonomica 31: 381-387.
• Holmgren, I. 1919. Zytologische Studien über die Fortpflanzung bei den Gattungen Erigeron und Eupatorium. Kungliga Svenska Velenskapsakademiens Handlingar 59 (7): 1-118.
• Kościńska-Pająk, M. 1993. Embryological problems of biology of reproduction in the genus Chondrilla (Compositae). A. Pretová, M. G. Ostrolucka and M. Bežo [eds.], Proceedings of the Vlth conference of plant embryologists from Slovakia, Czech Republic and Poland, 20-23 September 1993, 67-71. Nitra.
• Kościńska-Pająk, M. 1996. Embryological Problems in the apomictic species Chondrilla juncea L. (Compositae). Folia Geobotanica et Phytotaxonomica 31: 397-403.
• Poddubnaya-Arnoldi, V. A. 1933. Geschlechtliche und ungeschlechtliche Fortpflanzung bei einigen Chondrilla Arten. Planta 19: 46-86.