Rights statement: This is the author’s version of a work that was accepted for publication in Current Biology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Current Biology, 28,19, 2018 DOI: 10.1016/j.cub.2018.07.074
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Available under license: CC BY-NC-ND: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - The xerobranching response represses lateral root formation when roots are not in contact with water
AU - Orman-Ligeza, Beata
AU - Morris, Emily C.
AU - Parizot, Boris
AU - Livigne, Tristan
AU - Babe, Aurelie
AU - Ligeza, Aleksander
AU - Klein, Stephanie
AU - Sturrock, Craig D.
AU - Xuan, Wei
AU - Novák, Ondřey
AU - Ljung, Karin
AU - Fernandez, Maria
AU - Rodriguez, Pedro L.
AU - Dodd, Ian Charles
AU - De Smit, Ive
AU - Chaumont, Francois
AU - Batoko, Henri
AU - Périlleux, Claire
AU - Lynch, Jonathan P.
AU - Bennett, Malcolm J.
AU - Beeckman, Tom
AU - Draye, Xavier
N1 - This is the author’s version of a work that was accepted for publication in Current Biology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Current Biology, 28,19, 2018 DOI: 10.1016/j.cub.2018.07.074
PY - 2018/10
Y1 - 2018/10
N2 - 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 optimising 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 rapidlyrepress 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/RCARdependent signalling 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 wateravailability in their local micro-environment and to use internal resources efficiently.
AB - 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 optimising 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 rapidlyrepress 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/RCARdependent signalling 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 wateravailability in their local micro-environment and to use internal resources efficiently.
U2 - 10.1016/j.cub.2018.07.074
DO - 10.1016/j.cub.2018.07.074
M3 - Journal article
VL - 28
SP - 3165
EP - 3173
JO - Current Biology
JF - Current Biology
SN - 0960-9822
IS - 19
ER -