Root Tropisms: Investigations on Earth and in Space to Unravel Plant Growth Direction

Frontiers in Plant Science
Lucius Wilhelminus Franciscus MuthertGiovanna Aronne

Abstract

Root tropisms are important responses of plants, allowing them to adapt their growth direction. Research on plant tropisms is indispensable for future space programs that envisage plant-based life support systems for long-term missions and planet colonization. Root tropisms encompass responses toward or away from different environmental stimuli, with an underexplored level of mechanistic divergence. Research into signaling events that coordinate tropistic responses is complicated by the consistent coincidence of various environmental stimuli, often interacting via shared signaling mechanisms. On Earth the major determinant of root growth direction is the gravitational vector, acting through gravitropism and overruling most other tropistic responses to environmental stimuli. Critical advancements in the understanding of root tropisms have been achieved nullifying the gravitropic dominance with experiments performed in the microgravity environment. In this review, we summarize current knowledge on root tropisms to different environmental stimuli. We highlight that the term tropism must be used with care, because it can be easily confused with a change in root growth direction due to asymmetrical damage to the root, as can occur i...Continue Reading

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Citations

Oct 13, 2020·Frontiers in Plant Science·Ágnes Szepesi
Sep 10, 2020·Journal of Experimental Botany·Ying LiWeifeng Xu
Jan 28, 2021·Plants·Luigi Gennaro Izzo, Giovanna Aronne
Dec 5, 2020·Proceedings of the National Academy of Sciences of the United States of America·Derek E MoultonAlain Goriely
Mar 15, 2021·Physiologia Plantarum·Luigi Gennaro IzzoCelina Gómez
Feb 16, 2021·FEMS Microbiology Ecology·Alicia Balbín-SuárezKornelia Smalla
Mar 31, 2021·Journal of Experimental Botany·Chaonan LiRuilian Jing
May 12, 2021·Journal of Experimental Botany·Martijn van ZantenMarcel Quint

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Methods Mentioned

BETA
transgenic
salt stress
ISS

Software Mentioned

ROTATO

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