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In contrast to animals, post-embryonic development of plants is highly plastic. This necessitates the integration of internal and external signals to allow for a rapid adjustment of developmental programs according to the prevailing conditions. A prime example of such plasticity are rhizodermic cells, in which function and fate results from an array of information. Root epidermal cells can develop...
The effect of a low-molecular weight, water-extractable fraction of humic substances (WEHS) derived from sphagnum peat on post-embryonic plant development has been studied using Arabidopsis roots. Application of humic substances caused an array of changes in root morphology, such as an increase in root hair length and density, formation of ectopic root hairs, and an increase in cell proliferation...
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