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This study discovered that calcium dependent protein kinase 1 (CPK1) directly activates cyclic nucleotide-gated channels 5, 6, and 9, promoting root hair growth in Arabidopsis by regulating Ca²⁺ signaling.

This study found that root hairs of wild-type Arabidopsis grow faster and longer under low potassium stress, with changes in actin filament dynamics and specific regulation by the actin bundling proteins VLN1 and VLN4.

In this study on Arabidopsis, the researchers identified CIPK13 and CIPK18 as crucial genes for root hair growth, finding that deficiencies in these genes resulted in shorter root hairs and reduced growth rates due to altered calcium oscillations.

In this study, Bacillus subtilis strain ALC_02 was observed to enhance phosphorus acquisition in phosphorus-limited dwarf tomato plants by promoting root and root hair growth, with potential implications for developing effective bacterial P biofertilizers.

In this study, researchers identified a gene regulatory network in Arabidopsis that controls root hair growth under low-temperature conditions, revealing specific transcription factors and downstream targets that contribute to this growth response despite overall plant development being halted.

This study found that the transcription factor GLABRA 2 inhibits ethylene production, regulating root hair growth in Arabidopsis under nutrient deficiency conditions.

This study reports that a low concentration of chitosan induces callose deposition and slows root hair growth in Arabidopsis, suggesting an evolutionary conservation of this response to mild biotic stress across plant types.

This study explored how root hairs integrate opposing growth signals but did not report new conclusive findings on the activation of known molecular players in polar growth.

This study concluded that the receptor-like kinase ERULUS, regulated by auxin, is crucial for modulating cell wall composition and pectin dynamics during root hair growth in Arabidopsis.

This study found that RSL4 in Arabidopsis thaliana regulates genes necessary for root hair elongation by controlling proteins involved in cell signaling, cell wall modification, and secretion.

This study found that the FER/MLO signaling module plays a crucial role in calcium oscillations and ROS production in root hair tip growth, with the MLO15 protein regulating these processes and restoring disrupted growth and signaling in fer mutant root hairs.

This study reported that a Maca hydrolysate extract protected human hair follicles from oxidative and inflammatory stress and promoted hair growth in ex vivo models, suggesting a potential use for managing hair loss.

This study found that testosterone and dihydrotestosterone significantly decreased the proliferation of papilla cells compared to dermal fibroblasts and outer root sheath keratinocytes in cultured hair follicle cells.

This study found that quaternary ammonium iminofullerenes (IFQA) can alleviate oxidative stress in maize caused by hydrogen peroxide, promoting root growth by enhancing antioxidant cycles and reducing ROS accumulation.

This study found that root hairs of oat seedlings had the greatest elongation in moist air environments and that low calcium availability can still support growth unless other toxic ions are present.

This study found that root hairs in maize, wheat, and finger millet continued to grow beyond the typical root hair zone when grown with the Turface® fertigation system, highlighting potential for understanding root hair dynamics and crop improvement.

This study found that strontium cannot fully substitute for calcium in oat seedling root and root hair growth, though it may help mitigate toxic effects from other ions.

This review examines the role of root hair specification and nutrient acquisition in plants, emphasizing the need for further genetic research to understand the mechanisms influencing root hair development and growth.

This study experimentally validated Lockhart's viscoplastic framework for tip growth in Arabidopsis root hairs by demonstrating alignment with observed growth rates and estimating yield turgor pressure and cell wall viscosity, offering a methodology adaptable to other species and conditions.

This study found that epidermal and fibroblast growth factors increased proliferation of human hair bulb papilla cells and root sheath fibroblasts in vitro, while hydrocortisone decreased it and minoxidil had no effect.

This study found that women with genetic hair loss experienced significant improvements in hair density, count, and thickness when treated with both Rehmannia root extract and microneedling therapy, with the combination showing the greatest benefits compared to each treatment alone.

Minoxidil enhances hair growth and preserves the root sheath in cultured follicles.

This study found that epidermal growth factor and fibroblast growth factor accelerated proliferation of human hair bulb papilla cells and root sheath fibroblasts cultured in vitro.

In this study, Rosa multiflora root extracts showed strong antioxidant activity and promoted expression of growth factors IGF1 and PDGFB, suggesting potential use as a natural hair growth agent.

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.

This study found that extracellular vesicles from low-passage dermal papilla cells may activate hair growth by delivering miR-140-5p, which downregulates BMP2 signaling, suggesting potential therapeutic targets for alopecia.

In this study, applying G. glabra root extract to female rats resulted in faster and more extensive hair growth than minoxidil or a control treatment.

This study found that the petroleum ether extract of Glycyrrhiza glabra roots promoted faster and longer hair growth in female Wistar rats compared to minoxidil and control treatments.

Overexpression of certain genes can shorten hair by disrupting the hair-growth cycle.

This study found that a novel peptide, FOL-005, derived from osteopontin, significantly inhibited hair growth in human hair follicles both ex vivo and in vivo, suggesting potential as a treatment for unwanted hair growth.