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Curr Opin Plant Biol. 2007 Jun;10(3):266-75. Epub 2007 Apr 16.

Plants need their vitamins too.

Author information

  • 1Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK. as25@cam.ac.uk

Abstract

Over recent years, the pathways for the biosynthesis of many vitamins have been elucidated at the molecular level in plants, and several unique features are emerging. One is that the mitochondrion plays an important role in the synthesis of folate (vitamin B9), biotin (B7), pantothenate (B5), ascorbate (C), and possibly thiamin (B1). Second, the production of some of these cofactors is regulated by developmental cues, and perhaps more surprisingly, by environmental signals such as high light and salinity. Moreover, the biosynthesis of thiamin in Arabidopsis may be negatively regulated by a riboswitch, a novel method of gene regulation that is characteristic of cofactor biosynthesis in bacteria. Vitamin B12 is unique in that it is not found in vascular plants, but is abundant in algae; recent molecular work has revealed that algae do not synthesise the vitamin but instead obtain it from bacteria.

PMID:
17434786
[PubMed - indexed for MEDLINE]
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