Distribution of calcium (Ca) and magnesium (Mg) in the leaves of Brassica rapa under varying exogenous Ca and Mg supply.

Annals of Botany
Juan Jose RiosMartin R Broadley

Abstract

Leafy vegetable Brassica crops are an important source of dietary calcium (Ca) and magnesium (Mg) and represent potential targets for increasing leaf Ca and Mg concentrations through agronomy or breeding. Although the internal distribution of Ca and Mg within leaves affects the accumulation of these elements, such data are not available for Brassica. The aim of this study was to characterize the internal distribution of Ca and Mg in the leaves of a vegetable Brassica and to determine the effects of altered exogenous Ca and Mg supply on this distribution. Brassica rapa ssp. trilocularis 'R-o-18' was grown at four different Ca:Mg treatments for 21 d in a controlled environment. Concentrations of Ca and Mg were determined in fully expanded leaves using inductively coupled plasma-mass spectrometry (ICP-MS). Internal distributions of Ca and Mg were determined in transverse leaf sections at the base and apex of leaves using energy-dispersive X-ray spectroscopy (EDS) with cryo-scanning electron microscopy (cryo-SEM). Leaf Ca and Mg concentrations were greatest in palisade and spongy mesophyll cells, respectively, although this was dependent on exogenous supply. Calcium accumulation in palisade mesophyll cells was enhanced slightly und...Continue Reading

References

Aug 23, 2003·Annals of Botany·Philip J White, Martin R Broadley
Jun 2, 2009·Current Opinion in Plant Biology·Alison J Karley, Philip J White
Apr 13, 2010·BMC Plant Biology·Pauline StephensonLars Østergaard
Apr 23, 2010·Annals of Botany·Simon Conn, Matthew Gilliham
May 1, 2010·Annals of Botany·P J White, P H Brown
Jun 1, 2010·The Proceedings of the Nutrition Society·Martin R Broadley, Philip J White
Apr 23, 2011·Journal of Experimental Botany·Matthew GillihamStephen D Tyerman
Aug 30, 2011·Nature Genetics·Xiaowu WangUNKNOWN Brassica rapa Genome Sequencing Project Consortium

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Citations

Sep 28, 2012·Nutrients·Jian YangKendal D Hirschi
Nov 14, 2015·Journal of the Science of Food and Agriculture·Arkadiusz PrzybyszStanisław W Gawroński
Feb 20, 2013·Metallomics : Integrated Biometal Science·Christian HermansNathalie Verbruggen

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