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The plant hormone ethylene restricts Arabidopsis growth via the epidermis

Abstract : Significance Ethylene is a gaseous hormone that controls plant life throughout development. Being a simple hydrophobic molecule, it can freely enter cells; therefore, the cell type specificity of its action is challenging. By means of tissue-specific expression of two negative regulators of the signaling cascade, we selectively disrupted the ethylene signal in different cell types without affecting its biosynthesis. We demonstrate that ethylene restricts plant growth by dampening the effect of auxins in the outermost cell layer. We further show that this epidermis-specific signaling has an impact on the growth of neighboring cells, suggesting that the master controller of cell expansion resides in the epidermis, where it senses the environment and, subsequently drives growth, of the inner tissues.
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Contributor : Thomas Potuschak Connect in order to contact the contributor
Submitted on : Thursday, November 10, 2022 - 4:34:04 PM
Last modification on : Saturday, November 19, 2022 - 3:41:49 AM


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Irina Ivanova Vaseva, Enas Qudeimat, Thomas Potuschak, Yunlong Du, Pascal Genschik, et al.. The plant hormone ethylene restricts Arabidopsis growth via the epidermis. Proceedings of the National Academy of Sciences of the United States of America, 2018, 115 (17), ⟨10.1073/pnas.1717649115⟩. ⟨hal-03847589⟩



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