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Annals of Botany 85 (Supplement A): 29-37, 2000
© 2000 Annals of Botany Company

Pollen-Pistil Interactions in Nicotiana tabacum

Alice Y. Cheung 1, Hen-Ming Wu 2, Veronica di Stilio 3, Richard Glaven 3, Christine Chen 2, Eric Wong 2, Justyne Ogdahl 3, and Athena Estavillo 3

1 Department of Biochemistry and Molecular Biology, Molecular and Cell Biology Graduate Program and Plant Biology Graduate Program, University of Massachusetts, Amherst, MA 01003, USA
2 Department of Biochemistry and Molecular Biology, Molecular and Cell Biology Graduate Program, University of Massachusetts, Amherst, MA 01003, USA
3 Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst, MA 01003, USA

Fax +1 413-545-3291, acheung{at}biochem.umass.edu

Pollination involves a series of interactions between the surface of the male gametophyte and the extracellular matrix of several distinct sporophytic tissues in the pistil. Pollen germinates on the stigmatic surface and develops a tube that elongates in the transmitting tract of the style to transport the male gametes to the embryo sac inside the ovary. Pollen tube growth is fuelled by cytosolic activities within the pollen, but female tissues facilitate this process to ensure that pollen tubes arrive at the ovary when the ovules are the most receptive for maximum reproductive success. Interactions between pollen and pistil factors, probably both physical and biochemical, must be transmitted to the pollen cytosol to elicit the appropriate pollen cellular activities. Our research focuses on identifying the molecules that are involved in these interactions, understanding their biochemical and cellular bases, transmittal of these interactive signals into the pollen cytosol and the pollen cellular responses.

Adhesion, AGPs, cytoskeleton, extracellular matrix, pistil, nutrition, pollen, pollen tube guidance, signal transduction, tobacco, vesicular transport

Submitted on July 21, 1999
Revised on September 15, 1999
Accepted on October 11, 1999


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