Recovery of root hydrotropism in miz1 mutant by eliminating root gravitropism.

Mizu-kussei1 (MIZ1) plays a crucial role in root hydrotropism, but it is still unclear whether auxin-mediated gravitropism is involved in MIZ1-modulated root hydrotropism. This study aimed to investigate whether the hydrotropism of the Arabidopsis miz1 mutants could be restored through pharmacological inhibition of auxin transport or genetic modification in root gravitropism. Our findings indicate that the hydrotropic defects of miz1 mutant can be partly recovered by using an auxin transport inhibitor. Furthermore, miz1/pin2 double mutants exhibit more pronounced defects in root gravitropism compared to the wild type, while still displaying a normal hydrotropic response similar to the wild type. These results suggest that the elimination of gravitropism enables miz1 roots to become hydrotropically responsive to moisture gradients. Copyright © 2023 Elsevier GmbH. All rights reserved.

Citation

Ying Li, Lulu Wang, Yadi Chen, Jianhua Zhang, Weifeng Xu. Recovery of root hydrotropism in miz1 mutant by eliminating root gravitropism. Journal of plant physiology. 2024 Jan;292:154144

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PMID: 38104389

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