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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Hydraulic flux–responsive hormone redistribution determines root branching
AU - Mehra, Poonam
AU - Pandey, Bipin K.
AU - Melebari, Dalia
AU - Banda, Jason
AU - Leftley, Nicola
AU - Couvreur, Valentin
AU - Rowe, James
AU - Anfang, Moran
AU - De Gernier, Hugues
AU - Morris, Emily
AU - Sturrock, Craig J.
AU - Mooney, Sacha J.
AU - Swarup, Ranjan
AU - Faulkner, Christine
AU - Beeckman, Tom
AU - Bhalerao, Rishikesh P.
AU - Shani, Eilon
AU - Jones, Alexander M.
AU - Dodd, Ian C.
AU - Sharp, Robert E.
AU - Sadanandom, Ari
AU - Draye, Xavier
AU - Bennett, Malcolm J.
PY - 2022/11/18
Y1 - 2022/11/18
N2 - Plant roots exhibit plasticity in their branching patterns to forage efficiently for heterogeneously distributed resources, such as soil water. The xerobranching response represses lateral root formation when roots lose contact with water. Here, we show that xerobranching is regulated by radial movement of the phloem-derived hormone abscisic acid, which disrupts intercellular communication between inner and outer cell layers through plasmodesmata. Closure of these intercellular pores disrupts the inward movement of the hormone signal auxin, blocking lateral root branching. Once root tips regain contact with moisture, the abscisic acid response rapidly attenuates. Our study reveals how roots adapt their branching pattern to heterogeneous soil water conditions by linking changes in hydraulic flux with dynamic hormone redistribution.
AB - Plant roots exhibit plasticity in their branching patterns to forage efficiently for heterogeneously distributed resources, such as soil water. The xerobranching response represses lateral root formation when roots lose contact with water. Here, we show that xerobranching is regulated by radial movement of the phloem-derived hormone abscisic acid, which disrupts intercellular communication between inner and outer cell layers through plasmodesmata. Closure of these intercellular pores disrupts the inward movement of the hormone signal auxin, blocking lateral root branching. Once root tips regain contact with moisture, the abscisic acid response rapidly attenuates. Our study reveals how roots adapt their branching pattern to heterogeneous soil water conditions by linking changes in hydraulic flux with dynamic hormone redistribution.
KW - Multidisciplinary
U2 - 10.1126/science.add3771
DO - 10.1126/science.add3771
M3 - Journal article
VL - 378
SP - 762
EP - 768
JO - Science
JF - Science
SN - 0036-8075
IS - 6621
ER -