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Abstract

Plants interact with diverse microbes including those that result in nutrient-acquiringsymbioses. In order to balance the energy cost with the benefit gained, plants employa systemic negative feedback loop to control the formation of these symbioses. Thisis particularly well-understood in nodulation, the symbiosis between legumes andnitrogen-fixing rhizobia, and is known as autoregulation of nodulation (AON). However,much less is understood about the autoregulation of the ancient arbuscular mycorrhizalsymbioses that form between Glomeromycota fungi and the majority of land plants.Elegant physiological studies in legumes have indicated there is at least some overlapin the genes and signals that regulate these two symbioses but there are major gapsin our understanding. In this paper we examine the hypothesis that the autoregulationof mycorrhizae (AOM) pathway shares some elements with AON but that there are alsosome important differences. By reviewing the current knowledge of the AON pathway,we have identified important directions for future AOM studies. We also provide thefirst genetic evidence that CLV2 (an important element of the AON pathway) nfluences mycorrhizal development in a non-legume, tomato and review the interaction of the autoregulation pathway with plant hormones and nutrient status. Finally, we discuss whether autoregulation may play a role in the relationships plants form with other microbes.

Item Type:	Article
Authors/Creators:	Wang, C and Reid, JB and Foo, E
Keywords:	autoregulation, symbioses, arbuscular mycorrhiza, tomato, CLV2
Journal or Publication Title:	Frontiers in Plant Science
Publisher:	Frontiers Research Foundation
ISSN:	1664-462X
DOI / ID Number:	https://doi.org/10.3389/fpls.2018.00988
Copyright Information:	Copyright 2018 Wang, Reid and Foo. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
Related URLs:	Google Scholar: Reid, JB UTAS Profile: Reid, JB Google Scholar: Foo, E UTAS Profile: Foo, E
Item Statistics:	View statistics for this item

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