caa a22 4500 445321253 CHVBK 20180317142704.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10534-011-9458-x doi (NATIONALLICENCE)springer-10.1007/s10534-011-9458-x Role of aluminum in red-to-blue color changes in Hydrangea macrophylla sepals [Elektronische Daten] [Henry Schreiber, Andrew Jones, Corinne Lariviere, Kelly Mayhew, Judith Cain] Red, purple, and blue sepals on selected cultivars of Hydrangea macrophylla were analyzed for their aluminum content. This content was determined to be a function of the sepal color with red sepals possessing 0-10μg Al/g fresh sepal, purple sepals having 10-40μg Al/g fresh sepal, and blue sepals containing greater than 40μg Al/g fresh sepal. Accordingly, the threshold aluminum content needed to change H. macrophylla sepals from red to blue was about 40μg Al/g fresh sepal. Higher aluminum concentrations were incorporated into the sepals, but this additional aluminum did not affect the intensity or hue of the blue color. These observations agreed with a chemical model proposing that the concentration of the blue Al3+-anthocyanin complex reached a maximum when a sufficient excess of aluminum was present. In addition, the visible absorbance spectra of harvested red, purple, and blue sepals were duplicated by Al3+ and anthocyanin (delphinidin-3-glucoside) mixtures in this model chemical system. Springer Science+Business Media, LLC., 2011 Aluminum nationallicence Bluing nationallicence Delphinidin-3-glucoside nationallicence Hydrangea macrophylla nationallicence Sepal color nationallicence Schreiber Henry Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut Jones Andrew Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut Lariviere Corinne Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut Mayhew Kelly Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut Cain Judith Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut BioMetals Springer Netherlands 24/6(2011-12-01), 1005-1015 0966-0844 24:6<1005 2011 24 10534 https://doi.org/10.1007/s10534-011-9458-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10534-011-9458-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Schreiber Henry Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut NATIONALLICENCE 700 1- Jones Andrew Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut NATIONALLICENCE 700 1- Lariviere Corinne Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut NATIONALLICENCE 700 1- Mayhew Kelly Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut NATIONALLICENCE 700 1- Cain Judith Department of Chemistry, Virginia Military Institute, 24450, Lexington, VA, USA aut NATIONALLICENCE 773 0- BioMetals Springer Netherlands 24/6(2011-12-01), 1005-1015 0966-0844 24:6<1005 2011 24 10534 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer