Most of the phosphorus in the resting seed is stored inside protein storage vacuoles as PA (phytic acid; InsP6). The biosynthesis and accumulation of PA can be detected beginning from a few days after anthesis and seem to continue during seed development until maturation. The first step in PA biosynthesis is the formation of Ins3P by conversion of glucose 6-phosphate. This is then followed by a sequential and ordered phosphorylation of the remaining five positions of the inositol ring by a number of kinases, resulting in PA. Identification of low-PA mutants in cereals, legumes and Arabidopsis is instrumental for resolving the biosynthetic pathway and identification of genes controlling the accumulation of PA. Mutations in seven genes involved in the metabolism of PA have been identified and characterized among five plant species using induced mutagenesis and insertion elements. Understanding the biosynthetic pathway and genes controlling the accumulation of PA in plant seeds and how PA may balance the free phosphate is of importance for molecular breeding of crop plants, particularly cereals and legumes.
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April 2010
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Conference Article|
March 22 2010
Mutations in genes controlling the biosynthesis and accumulation of inositol phosphates in seeds
Søren K. Rasmussen;
Søren K. Rasmussen
1
1Department of Agriculture and Ecology, Faculty of Life Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark
1To whom correspondence should be addressed (email [email protected]).
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Christina Rønn Ingvardsen;
Christina Rønn Ingvardsen
1Department of Agriculture and Ecology, Faculty of Life Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark
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Anna Maria Torp
Anna Maria Torp
1Department of Agriculture and Ecology, Faculty of Life Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark
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Publisher: Portland Press Ltd
Received:
December 27 2009
Online ISSN: 1470-8752
Print ISSN: 0300-5127
© The Authors Journal compilation © 2010 Biochemical Society
2010
Biochem Soc Trans (2010) 38 (2): 689–694.
Article history
Received:
December 27 2009
Citation
Søren K. Rasmussen, Christina Rønn Ingvardsen, Anna Maria Torp; Mutations in genes controlling the biosynthesis and accumulation of inositol phosphates in seeds. Biochem Soc Trans 1 April 2010; 38 (2): 689–694. doi: https://doi.org/10.1042/BST0380689
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