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Science 7 May 1971:
Vol. 172. no. 3983, pp. 565 - 567
DOI: 10.1126/science.172.3983.565
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Articles

Unique Type of Angiosperm Pollen from the Family Annonaceae

James W. Walker 1

1 Depatrment of Botany, University of Masschusetts, Amherst 01002

The primitive antgiosperm family Annonaceae possesses a remarkable type of pollen that appears unique in its size (diameter up to 350 micrometers), lack of exine over nearly 50 percent of the grain surface at maturity, and proximalipolar aperture. This unique pollent is further distinguished by being in polyads which are compartmentalized individually within septate stamens.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Comparative development of aseptate and septate anthers of Annonaceae.
C.-H. Tsou and D. M. Johnson (2003)
Am. J. Botany 90, 832-848
   Abstract »    Full Text »    PDF »
Tetrad pollen formation in Annona (Annonaceae): proexine formation andbinding mechanism.
C.-H. Tsou and Y.-L. Fu (2002)
Am. J. Botany 89, 734-747
   Abstract »    Full Text »    PDF »
Primitively Columellaless Pollen: A New Concept in the Evolutionary Morphology of Angiosperms.
J. W. Walker, J. W. Walker, and J. J. Skvarla (1975)
Science 187, 445-447
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)