Evidence for a Pollination-Drop Mechanism in Paleozoic Pteridosperms
- 23 December 1977
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 198 (4323) , 1251-1252
- https://doi.org/10.1126/science.198.4323.1251
Abstract
A noncellular substance containing pollen and spores has been discovered protruding from the micropyle of a seed fern ovule of Middle Pennsylvanian age. This provides direct evidence that pollination-drop mechanisms comparable to those of many extant gymnosperms characterize some Paleozoic pteridosperms.This publication has 5 references indexed in Scilit:
- MICROGAMETOPHYTE DEVELOPMENT IN THE PALEOZOIC SEED FERN FAMILY CALLISTOPHYTACEAEAmerican Journal of Botany, 1974
- Evidence of Pollen Tubes in Paleozoic PteridospermsScience, 1972
- ONTOGENY OF THE PALEOZOIC OVULE, CALLOSPERMARION PUSILLUMAmerican Journal of Botany, 1971
- IDANOTHEKION GEN. N., A SYNANGIATE POLLEN ORGAN WITH SACCATE POLLEN FROM THE MIDDLE PENNSYLVANIAN OF ILLINOISAmerican Journal of Botany, 1970
- Pennsylvanian Flora of Illinois as Revealed in Coal Balls. IBotanical Gazette, 1934