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Efficient Polyethylene Glycol (PEG) Mediated Transformation of the Moss Physcomitrella patens
Published on: April 19, 2011
Ethylene synthesis in moss protonema.
1Botanisches Institut der Universität Heidelberg, Im Neuenheimer Feld 360, D-6900 Heidelberg.
Journal of Plant Physiology
|December 1, 2012
Summary
Ethylene production in moss protonema is promoted by ACC, following pathways similar to higher plants. This ethylene formation correlates with ACC levels and is influenced by IAA during development.
Area of Science:
- Plant Physiology
- Moss Development
- Ethylene Biosynthesis
Background:
- Ethylene is a crucial plant hormone regulating various developmental processes.
- Understanding ethylene biosynthesis pathways in diverse plant groups like bryophytes is essential for comparative plant science.
- The moss Funaria hygrometrica serves as a model organism for studying early land plant development.
Purpose of the Study:
- To investigate the primary pathway of ethylene production in Funaria hygrometrica protonema.
- To correlate ethylene formation with endogenous 1-aminocyclopropane-1-carboxylic acid (ACC) levels during protonema development.
- To examine the influence of auxin (IAA) on ethylene biosynthesis in this moss species.
Main Methods:
- Sterile cultivation of Funaria hygrometrica protonema.
- Measurement of ethylene production using gas chromatography.
- Quantification of ACC content.
- Application of exogenous ACC, 2-ketoglutarate, glutamate, and indole-3-acetic acid (IAA).
Main Results:
- Ethylene formation was significantly promoted by ACC, but not by other tested precursors.
- Endogenous ACC content and ethylene production rates were positively correlated throughout protonema development.
- Exogenous IAA application stimulated both ACC accumulation and ethylene release.
- Ethylene production rates were comparable to those observed in higher plants and varied with developmental stage.
Conclusions:
- Ethylene biosynthesis in Funaria hygrometrica protonema proceeds via the ACC pathway, consistent with higher plants.
- Auxin (IAA) plays a regulatory role in ethylene production in mosses.
- The findings highlight conserved mechanisms of ethylene regulation across plant evolution.
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