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1-Aminocyclopropane-1-carboxylic acid stimulates tomato pollen tube growth independently of ethylene receptors

Althiab-Almasaud, Rasha and Sallanon, Huguette and Chang, Caren and Chervin, Christian 1-Aminocyclopropane-1-carboxylic acid stimulates tomato pollen tube growth independently of ethylene receptors. (2021) Physiologia Plantarum. 1-7. ISSN 0031-9317

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Official URL: https://doi.org/10.1111/ppl.13579

Abstract

The plant hormone ethylene plays vital roles in plant development, including pollen tube (PT) growth. Many studies have used the ethylene precursor, 1-aminocyclopropane-1-carboxylic acid (ACC), as a tool to trigger ethylene signaling. Several studies have suggested that ACC can act as a signal molecule independently of ethylene, inducing responses that are distinct from those induced by ethylene. In this study, we confirmed that ethylene receptor function is essential for promoting PT growth in tomato, but interestingly, we discovered that ACC itself can act as a signal that also promotes PT growth. Exogenous ACC stimulated PT growth even when ethylene perception was inhibited either chemically by treating with 1-methylcyclopropene (1-MCP) or genetically by using the ethyleneinsensitive Never Ripe (NR) mutant. Treatment with aminoethoxyvinylglycine, which reduces endogenous ACC levels, led to a reduction of PT growth, even in the NR mutants. Furthermore, GUS activity driven by an EIN3 Binding Site promoter (EBS:GUS transgene) was triggered by ACC in the presence of 1-MCP. Taken together, these results suggest that ACC signaling can bypass the ethylene receptor step to stimulate PT growth and EBS driven gene expression.

Item Type:Article
HAL Id:hal-03467840
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre de Coopération Internationale en Recherche Agronomique - CIRAD (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Institut Méditerranéen d'Océanologie - MIO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de La Réunion (FRANCE)
Other partners > University of Maryland (USA)
Other partners > Université d'Avignon et des Pays de Vaucluse (FRANCE)
Other partners > Université de Montpellier (FRANCE)
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Deposited On:26 Nov 2021 17:26

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