Experimental identification of Ca isotopic fractionations in higher plants

Controlling factors of Ca isotope fractionation in scleractinian corals evaluated by temperature, pH and light controlled culture experiments

“…These mechanisms are generally ubiquitous for animals, because Ca 2+ has been identified as an important mediator of the morphological differentiation of neurons (Gomez and Spitzer, 2000;Henly and Poo, 2004;Chierzi et al, 2005;Gomez and Zheng, 2006). Calcium is also an essential nutrient for higher plants, playing multiple roles in plant functioning, both at cellular and intracellular scales (Marschner, 1995;Cobert et al, 2011). Since scleractinian corals have a simple nerve net (Horridge, 1957;Ball et al, 2002;Bouzaiene et al, 2007) which requires Ca 2+ to operate properly, it is also essential for the coral polyps.…”

Isotope Fractionation Processes of Selected Elements

“…Studies on higher plants by Page et al (2008), Wiegand et al (2005) and Holmden and Belanger (2010) Experiments under controlled plant growth conditions allow the identification of 3 different Ca isotope fractionation steps (Cobert et al 2011;Schmitt et al 2013): (i) preferential 40 Ca uptake in the roots, (ii) preferential adsorption of 40 Ca on the cell walls during transfer from the roots to the leaves, (iii) additional 40 Ca fractionation in the storage organs, which seems to be controlled by the physiology of the plant.…”

Endemic Plants as Browse Crops in Agricultural Landscapes of New Zealand

“…In terms of large amounts of variability between native plant species, there was a 10-fold variation of Ca which is likely to reflect structural characteristics such as leaf thickness and amount of venation; pectins of the middle lamella of the xylem cell wall are significantly associated with Ca composition in leaves (Cobert et al 2011). Zinc concentrations were generally higher in native plants, including the native tussock grass Chionochloa, than in ryegrass.…”