Article ID Journal Published Year Pages File Type
2055447 Journal of Plant Physiology 2016 8 Pages PDF
Abstract

The plant hormone auxin has been widely studied with regard to synthesis, transport, signaling and functions among the land plants while there is still a lack of knowledge about the possible role for auxin regulation mechanisms in algae with “plant-like” structures. Here we use the alga Chara corallina as a model to study aspects of auxin signaling. In this respect we measured auxin on membrane potential changes and different ion fluxes (K+, H+) through the plasma membrane. Results showed that auxin, mainly IAA, could hyperpolarize the membrane potential of C. corallina internodal cells. Ion flux measurements showed that the auxin-induced membrane potential change may be based on the change of K+ permeability and/or channel activity rather than through the activation of proton pumps as known in land plants.

Related Topics
Life Sciences Agricultural and Biological Sciences Agronomy and Crop Science
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