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Lignification in Zinnia elegans L. stems is characterized by a burst in the production of H 2 O 2 , the apparent fate of which is to be used by xylem peroxidases for the polymerization of p -hydroxycinnamyl alcohols into lignins. A search for the sites of H 2 O 2 production in the differentiating...
When correct folding of protein in the endoplasmic reticulum (ER) is prevented, cells respond to overcome the accumulation of unfolded proteins. This cellular response, which includes the induction of ER chaperones, is called an unfolded protein response (UPR). Although a link between the UPR and...
La 3+ ions are known to antagonize Ca 2+ and are used as a Ca 2+ channel blocker but little is known on the direct effects of La 3+ . Micromolar La 3+ concentrations promoted root growth while higher concentrations were inhibitory. The uptake of La 3+ in maize root protoplasts revealed a membrane...