TLDR NADPH oxidase and phospholipase D help root hairs grow by activating calcium channels.
The document discussed the role of signalling enzymes, specifically NADPH oxidase and phospholipase D, in the growth and development of root hairs in plants. It highlighted that reactive oxygen species (ROS) produced by NADPH oxidase activate calcium ion channels in the apical plasma membrane, which is crucial for establishing the tip-focused calcium gradient necessary for root hair growth. These findings provided insights into the previously unknown signalling events involved in root hair formation.
612 citations
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February 2004 in “Nature” The study demonstrated that the OXI1 gene in Arabidopsis thaliana, which encodes a serine/threonine kinase, was crucial for oxidative burst-mediated signaling. OXI1 expression and kinase activity were induced by H2O2, and it was necessary for the activation of MAPKs MPK3 and MPK6 following AOS or elicitor treatment. OXI1 played a vital role in two distinct AOS-mediated processes: providing basal resistance to Peronospora parasitica infection and promoting root hair growth, highlighting its importance in the signal transduction pathway that connects oxidative signals to various downstream responses.
280 citations
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January 2004 in “The EMBO Journal” 141 citations
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June 2002 in “Philosophical Transactions of the Royal Society B Biological Sciences” The study revealed how specific genes and proteins control root hair growth in plants.
317 citations
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August 1997 in “The Plant Journal”
317 citations
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August 1997 in “The Plant Journal”
