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Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2017

Molecular link between auxin and ROS-mediated polar growth

Résumé

Significance Tip-growing root hairs are an excellent model system for deciphering the molecular mechanism underlying reactive oxygen species (ROS)-mediated cell elongation. Root hairs are able to expand in response to external signals, increasing several hundred-fold their original size, which is important for survival of the plant. Although their final cell size is of fundamental importance, the molecular mechanisms that control it remain largely unknown. In this study, we propose a molecular mechanism that links the auxin–auxin response factors module to activation of RSL4, which directly targets genes encoding ROS-producing enzymes such as NADPH oxidases (or RESPIRATORY BURST OXIDASE HOMOLOG proteins) and secreted type III peroxidases. Activation of these genes impacts on apoplastic ROS homeostasis, thereby stimulating root hair cell elongation.

Dates et versions

hal-03762994 , version 1 (29-08-2022)

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Citer

Silvina Mangano, Silvina Paola Denita-Juarez, Hee-Seung Choi, Eliana Marzol, Youra Hwang, et al.. Molecular link between auxin and ROS-mediated polar growth. Proceedings of the National Academy of Sciences of the United States of America, In press, 114 (20), pp.5289-5294. ⟨10.1073/pnas.1701536114⟩. ⟨hal-03762994⟩
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