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Evidence of Simple Polyembryony in Permian Seeds from Antarctica
Edith L. Smoot and Thomas N. Taylor
American Journal of Botany
Vol. 73, No. 7 (Jul., 1986), pp. 1079-1081
Published by: Botanical Society of America, Inc.
Stable URL: http://www.jstor.org/stable/2444126
Page Count: 3
You can always find the topics here!Topics: Embryos, Plant cells, Seeds, Antarctic regions, Polyembryony, Conifers, Gymnosperms, Fossils, Tracheids, Spermatozoa
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Well-preserved seeds with multiple embryos are described from the Permian of the Beardmore Glacier region, Antarctica. The seeds are platyspermic, winged and contain two archegonia in the micropylar end. Each archegonium contains an undifferentiated, multicellular embryo at a comparable stage of development. Attached to one end of each embryo is an elongate structure similar to the suspensor in extant gymnosperms. This discovery represents the earliest example of simple polyembryony yet recorded from the fossil record.
American Journal of Botany © 1986 Botanical Society of America, Inc.