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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.

This study found that disrupting the microtubule cytoskeleton in Arabidopsis root hairs caused loss of growth directionality and suggested microtubules interact with calcium gradients to regulate apical growth stability.

This paper discusses how NADPH oxidase and phospholipase D are important for root hair growth, with reactive oxygen species from NADPH oxidase activating calcium ion channels in root hairs.

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.

This study found that salinity stress in Arabidopsis thaliana root hairs may inhibit hair extension through changes in the tip-focused Ca(2+) gradient, while cytosolic pH remains unaffected.