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SEC8, a Subunit of the Putative Arabidopsis Exocyst Complex, Facilitates Pollen Germination and Competitive Pollen Tube Growth1[w]

Authors
  • Rex A. Cole
  • Lukás Synek
  • Viktor Zarsky
  • John E. Fowler
Publisher
American Society of Plant Biologists
Publication Date
Aug 01, 2005
Source
PMC
Keywords
Disciplines
  • Biology
License
Unknown

Abstract

SEC8, a Subunit of the Putative Arabidopsis Exocyst Complex, Facilitates Pollen Germination and Competitive Pollen Tube Growth by Rex A. Cole, Lukás Synek, Viktor Zarsky, and John E. Fowler Plantphysiol Volume 138(4):2005-2018 August 11, 2005 ©2005 by American Society of Plant Biologists Microarray data for putative exocyst components in Arabidopsis indicate that transcripts for all eight subunits are expressed widely. Cole R et al. Plantphysiol 2005;138:2005-2018 ©2005 by American Society of Plant Biologists T-DNA insertional mutations interrupt the coding region of SEC8 (At3g10380) at multiple sites. Cole R et al. Plantphysiol 2005;138:2005-2018 ©2005 by American Society of Plant Biologists Insertional mutations affect the SEC8 transcript and transmission through the male gametophyte. Cole R et al. Plantphysiol 2005;138:2005-2018 ©2005 by American Society of Plant Biologists Alexander staining reveals that a SEC8 allele with an absolute transmission defect is associated with a pollen germination defect. Cole R et al. Plantphysiol 2005;138:2005-2018 ©2005 by American Society of Plant Biologists TEM images indicate that ungerminated pollen from sec8-m3 heterozygotes responds to signals to germinate. Cole R et al. Plantphysiol 2005;138:2005-2018 ©2005 by American Society of Plant Biologists Transmission of the sec8-m4 allele increases in incompletely filled siliques. Cole R et al. Plantphysiol 2005;138:2005-2018 ©2005 by American Society of Plant Biologists The sec8-m4 mutation decreases pollen tube growth rate in culture. Cole R et al. Plantphysiol 2005;138:2005-2018 ©2005 by American Society of Plant Biologists Microarray data for putative exocyst components in Arabidopsis indicate that transcripts for all eight subunits are expressed widely. In particular, the experiments of Honys and Twell (2004) show that AtSEC8, as well as other putative exocyst components, are expressed in developing pollen. Pollen sources of RNA for the expression analysis included uninucleate m

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