Chelator profiling in Deschampsia cespitosa (L.) Beauv. Reveals a Ni reaction, which is distinct from the ABA and cytokinin associated response to Cd.

Plant hormones, including abscisic acid (ABA) and cytokinins (CKs), fluctuate as a result of excess metal exposure. Changes in hormonal concentration regulate plant growth and may also signal activation of metal chelators. The grass Deschampsia cespitosa was dosed with either Ni or Cd or pulsed with exogenous ABA.

Identification and quantification of glutathione and phytochelatins from Chlorella vulgaris by RP-HPLC ESI-MS/MS and oxygen-free extraction.

Phytochelatins are short, cysteine-containing, detoxification peptides produced by plants, algae, and fungi in response to heavy metal exposure. These peptides auto-oxidize easily. Current extraction protocols do not adequately address losses of phytochelatins because of their oxidation and the use of indirect methods for quantification.