Analysis of 1-Aminocyclopropane-1-Carboxylic Acid Uptake Using a Protoplast System.

1-Aminocyclopropane-1-carboxylic acid (ACC) is a biosynthetic precursor of ethylene. The movement of ACC across the plasma membrane (PM) has been implicated in various physiological contexts during environmental adaptation and differentiation in higher plants. A PM-localized transporter in Arabidopsis thaliana, LYSINE HISTIDINE TRANSPORTER1 (LHT1) participates in the uptake of ACC, implicating a class of amino-acid transporters in the transport of ACC. Here, we describe the method for assaying uptake of ACC into the plant cells using an Arabidopsis mesophyll protoplast system.