Effect of amending soil with organic acids on perylene uptake into <i>Cucurbita pepo</i>

Zinc finger protein genes from Cucurbita pepo are promising tools for conferring non-Cucurbitaceae plants with ability to accumulate persistent organic pollutants

“…Low-molecular-weight organic acids such as citrate and malate are reportedly exuded from Cucurbitaceae roots and desorb DDE from soil (White et al, 2003b;Wang et al, 2004). Citrate and oxalate show desorption of the hydrophobic compound perylene into aqueous phase and intensive accumulation in stems of C. pepo (Yoshihara et al, 2014). Our results suggest that CpZFPs, which are transcription factors that regulate gene expression through a zinc finger motif, are also involved in the accumulation of hydrophobic compounds.…”

“…The exudation of low-molecular-weight organic acids such as citrate and malate by cucurbits is reported to be what allows them to take up hydrophobic compounds into their root cells (White et al, 2003a;Wang et al, 2004). Furthermore, amendment of citrate and oxalic acids into soil showed solubilization of the hydrophobic compound perylene and its uptake into Cucurbita pepo (Yoshihara et al, 2014). Translocation factors from roots to stems in C. pepo ssp.…”

Agrochemical Oryzemate treatment controls the uptake of hydrophobic organic pollutants through the regulation of major latex-like proteins

“…The accumulation mechanisms of hydrophobic organic pollutants in the Cucurbitaceae family have four steps: (1) solubilization in the rhizosphere; (2) uptake into the root tissue; (3) secretion into xylem vessels; and (4) transport to the aerial parts. Root-released organic acids solubilize hydrophobic organic pollutants in the rhizosphere (Yoshihara et al 2014). They diffuse in the plasma membrane of the root cells and reach the endodermis and pericycle, unhindered by the Casparian strip barrier (Naseer et al 2012).…”