ROS and Calcium Oscillations Are Required for Polarized Root Hair Growth

August 2022 in “ Plant Signaling & Behavior ”

Xinxin Zhang, Ang Bian, Teng Li, Lifei Ren, Li Li, Yuan Su, Qun Zhang

Studysummary This article reviews how calcium and reactive oxygen species gradients and oscillations interact to promote root hair cell expansion and reports no new experimental findings.

Our plain-language summary. Not medical advice or a treatment recommendation. Consult a qualified healthcare professional before changing treatment. Full disclaimer

The study investigated the essential roles of reactive oxygen species (ROS) and calcium ion (Ca2+) oscillations in the polarized growth of root hair cells in plants. It found that ROS homeostasis and Ca2+ oscillations, regulated by specific enzymes and channels, were critical for root hair elongation. The transcription factor RSL4 was identified as a key regulator, enhancing the expression of these enzymes to promote growth. The research underscored the interaction between ROS and Ca2+ gradients in facilitating root hair expansion, which is vital for nutrient uptake and plant anchorage. The study also suggested that understanding these mechanisms could improve crop performance in nutrient-poor soils, although further research was needed to clarify the regulatory pathways involved.

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research Class III Peroxidases PRX01, PRX44, and PRX73 Control Root Hair Growth in Arabidopsis Thaliana

19 citations , May 2022 in “International journal of molecular sciences”

This study suggests that PRX01, PRX44, and PRX73 regulate extensin-mediated cell wall properties during root hair cell growth, influencing growth patterns, peroxidase activity, and cell wall thickness.

research The Interaction of CaM7 and CNGC14 Regulates Root Hair Growth in Arabidopsis

46 citations , November 2019 in “Journal of Integrative Plant Biology”

This study found that calmodulin 7 (CaM7) inhibits the calcium channel CNGC14 in root hairs, affecting their polar growth by controlling calcium signaling.

research Multiple Cyclic Nucleotide-Gated Channels Coordinate Calcium Oscillations and Polar Growth of Root Hairs

56 citations , April 2019 in “The Plant Journal”

This study found that CNGC 6, CNGC 9, and CNGC 14 are crucial for maintaining calcium oscillations necessary for normal root hair growth in plants, with mutations leading to defects like swelling and bursting.

research CBL1-CIPK26-Mediated Phosphorylation Enhances Activity of the NADPH Oxidase RBOHC, but Is Dispensable for Root Hair Growth

32 citations , July 2018 in “FEBS letters”

In this study, researchers identified the CBL1-CIPK26 Ca 2+ sensor-kinase complexes as key modulators of the NADPH oxidase RBOHC crucial for root hair differentiation in plants.

research How Does pH Fit in with Oscillating Polar Growth?

37 citations , March 2018 in “Trends in Plant Science”

This review discusses the role of reactive oxygen species in regulating oscillating apoplastic pH gradients and growth in plant root hairs and pollen tubes, reporting no new experimental results.

research Arabidopsis CNGC14 Mediates Calcium Influx Required for Tip Growth in Root Hairs

93 citations , March 2017 in “Molecular Plant”

This study concluded that CNGC14 is a calcium-permeable channel crucial for polarized tip growth in Arabidopsis root hairs, but other channels may also influence the observed calcium influx.

research O-Glycosylated Cell Wall Proteins Are Essential in Root Hair Growth

274 citations , June 2011 in “Science”

In Arabidopsis thaliana, this study found that proper O-glycosylation of extensins is crucial for root hair elongation and self-assembly of the cell wall.

research Local Positive Feedback Regulation Determines Cell Shape In Root Hair Cells

512 citations , February 2008 in “Science”

In this study, researchers found that a positive feedback loop involving Ca 2+ and RHD2 NADPH oxidase-derived ROS helps maintain growth sites, crucial for root hair development and cell shape in Arabidopsis thaliana.

research The Role of Reactive Oxygen Species in Cell Growth: Lessons from Root Hairs

229 citations , May 2006 in “Journal of Experimental Botany”

This review highlights the role of reactive oxygen species in root hair growth and cell expansion in plants but does not report new empirical findings.

research Root Hair Growth in Arabidopsis Thaliana Is Directed by Calcium and an Endogenous Polarity

200 citations , November 1997 in “Planta”

This study found that while a tip-focused calcium gradient influences localized growth in root hairs and pollen tubes, it is not the primary determinant of growth direction in root hairs of Arabidopsis thaliana.

research Cytoplasmic Free Calcium Distributions During the Development of Root Hairs of Arabidopsis Thaliana

317 citations , August 1997 in “The Plant Journal”

This study observed that while calcium influx does not initiate root hairs in Arabidopsis thaliana, it may be crucial for sustaining their elongation through elevated calcium levels at the root hair tip.