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Temporal and Spatial Expression of 1-Aminocyclopropane-1-Carboxylate Oxidase mRNA following Pollination of Immature and Mature Petunia Flowers

Temporal and Spatial Expression of 1-Aminocyclopropane-1-Carboxylate Oxidase mRNA following... Abstract Pollination of petunia (Petunia hybrida) flowers induces a rapid increase in ethylene production by styles, which subsequently leads to increased ethylene production by the corolla, inducing senescence. We have investigated the temporal and spatial expression of 1-aminocyclopropane-1-carboxylate (ACC) oxidase transcripts in petunia styles in an attempt to elucidate its role in increased ethylene biosynthesis following pollination. Previously, we reported that the development of petunia flowers was associated with increased ACC oxidase mRNA localized specifically in the stigmatic regions of the style (X. Tang, A.M.T. Gomes, A. Bhatia, W.R. Woodson [1994] Plant Cell 6: 1227–1239). The rapid increase in ethylene production by styles within the 1st h following pollination was correlated with the expression of ACC oxidase mRNAs during development. Pollination of petunia flowers prior to anthesis and the expression of ACC oxidase mRNA led to a substantial increase in ethylene production, but this was delayed by several hours in comparison with flowers at anthesis. This delayed increase in ethylene production by pollinated styles from immature flowers was associated with an increased ACC oxidase transcript abundance. Treatment with the ethylene action inhibitor 2,5-norbornadiene did not affect the early increase in ethylene production or the expression of ACC oxidase mRNAs. No differences in the rate of pollen germination or tube growth were detected when applied to stigmas from immature or mature flowers, indicating that the delay in ethylene production was likely the result of limited ACC oxidase activity. Localization of ACC oxidase mRNAs following pollination by in situ hybridization revealed an abundance of transcripts in transmitting tract tissue within 4 h of pollination of both immature and mature styles, in contrast to their localization in stigmatic cells during development. This content is only available as a PDF. Copyright © 1996 by American Society of Plant Biologists This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Physiology Oxford University Press

Temporal and Spatial Expression of 1-Aminocyclopropane-1-Carboxylate Oxidase mRNA following Pollination of Immature and Mature Petunia Flowers

Tang, X.; Woodson, W. R.
Plant Physiology , Volume 112 (2) – Oct 1, 1996
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References (17)

Publisher
Oxford University Press
Copyright
Copyright © 2021 American Society of Plant Biologists
ISSN
0032-0889
eISSN
1532-2548
DOI
10.1104/pp.112.2.503
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Abstract

Abstract Pollination of petunia (Petunia hybrida) flowers induces a rapid increase in ethylene production by styles, which subsequently leads to increased ethylene production by the corolla, inducing senescence. We have investigated the temporal and spatial expression of 1-aminocyclopropane-1-carboxylate (ACC) oxidase transcripts in petunia styles in an attempt to elucidate its role in increased ethylene biosynthesis following pollination. Previously, we reported that the development of petunia flowers was associated with increased ACC oxidase mRNA localized specifically in the stigmatic regions of the style (X. Tang, A.M.T. Gomes, A. Bhatia, W.R. Woodson [1994] Plant Cell 6: 1227–1239). The rapid increase in ethylene production by styles within the 1st h following pollination was correlated with the expression of ACC oxidase mRNAs during development. Pollination of petunia flowers prior to anthesis and the expression of ACC oxidase mRNA led to a substantial increase in ethylene production, but this was delayed by several hours in comparison with flowers at anthesis. This delayed increase in ethylene production by pollinated styles from immature flowers was associated with an increased ACC oxidase transcript abundance. Treatment with the ethylene action inhibitor 2,5-norbornadiene did not affect the early increase in ethylene production or the expression of ACC oxidase mRNAs. No differences in the rate of pollen germination or tube growth were detected when applied to stigmas from immature or mature flowers, indicating that the delay in ethylene production was likely the result of limited ACC oxidase activity. Localization of ACC oxidase mRNAs following pollination by in situ hybridization revealed an abundance of transcripts in transmitting tract tissue within 4 h of pollination of both immature and mature styles, in contrast to their localization in stigmatic cells during development. This content is only available as a PDF. Copyright © 1996 by American Society of Plant Biologists This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)

Journal

Plant Physiology – Oxford University Press

Published: Oct 1, 1996

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