The Xerobranching Response Represses Lateral Root Formation When Roots Are Not in Contact with Water

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F18%3A00495670" target="_blank" >RIV/61389030:_____/18:00495670 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15310/18:73592159
Result on the web
<a href="http://dx.doi.org/10.1016/j.cub.2018.07.074" target="_blank" >http://dx.doi.org/10.1016/j.cub.2018.07.074</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cub.2018.07.074" target="_blank" >10.1016/j.cub.2018.07.074</a>

Result language
angličtina
Original language name
The Xerobranching Response Represses Lateral Root Formation When Roots Are Not in Contact with Water
Original language description
Efficient soil exploration by roots represents an important target for crop improvement and food security [1, 2]. Lateral root (LR) formation is a key trait for optimizing soil foraging for crucial resources such as water and nutrients. Here, we report an adaptive response termed xerobranching, exhibited by cereal roots, that represses branching when root tips are not in contact with wet soil. Non-invasive X-ray microCT imaging revealed that cereal roots rapidly repress LR formation as they enter an air space within a soil profile and are no longer in contact with water. Transcript profiling of cereal root tips revealed that transient water deficit triggers the abscisic acid (ABA) response pathway. In agreement with this, exogenous ABA treatment can mimic repression of LR formation under transient water deficit. Genetic analysis in Arabidopsis revealed that ABA repression of LR formation requires the PYR/PYL/RCAR-dependent signaling pathway. Our findings suggest that ABA acts as the key signal regulating xerobranching. We conclude that this new ABA-dependent adaptive mechanism allows roots to rapidly respond to changes in water availability in their local micro-environment and to use internal resources efficiently.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10611 - Plant sciences, botany

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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