AI Article Synopsis
- The study investigates how different Arabidopsis thaliana plants adapt their root systems in response to salt stress, revealing significant variations in their root architecture remodeling strategies.
- Salt stress prompts a four-phase growth response in roots: stop, quiescent, recovery, and homoeostasis, with some plant accessions skipping the quiescent phase altogether.
- Mathematical modeling was used to connect dynamic root traits to overall architecture, finding that main root growth during homoeostasis and lateral root emergence are crucial for determining root structure, alongside a trade-off in resource investment between main and lateral root lengths under salt stress.
Article Abstract
The root system architecture of a plant changes during salt stress exposure. Different accessions of Arabidopsis thaliana have adopted different strategies in remodelling their root architecture during salt stress. Salt induces a multiphase growth response in roots, consisting of a stop phase, quiescent phase, recovery phase and eventually a new level of homoeostasis. We explored natural variation in the length of and growth rate during these phases in both main and lateral roots and find that some accessions lack the quiescent phase. Using mathematical models and correlation-based network, allowed us to correlate dynamic traits to overall root architecture and discover that both the main root growth rate during homoeostasis and lateral root appearance are the strongest determinants of overall root architecture. In addition, this approach revealed a trade-off between investing in main or lateral root length during salt stress. By studying natural variation in high-resolution temporal root growth using mathematical modelling, we gained new insights in the interactions between dynamic root growth traits and we identified key traits that modulate overall root architecture during salt stress.
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| http://dx.doi.org/10.1111/pce.14583 | DOI Listing |
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