Chinese Journal of Biochemistry and Molecular Biol 2009, Vol. 25 Issue (08) :702-707    DOI:
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Mechanisms of Boron Transport in Plants
XIA Jin-Chan, HE Yi-Kun
(College of Life Sciences, Capital Normal University, Beijing 100048,China)

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Abstract Boron is an essential nutrient for the normal growth of higher plants. Boron deficiency is a worldwide problem in major grain producing areas that results in the rapid inhibition of plant growth. In recent years, the studies of the molecular basis of boron absorption and transport in plants has advanced significantly, several boron transports and channels were identified, for examples, NIP5;1, NIP6;1, BOR1 and BOR4. Under boron restriction, boron is taken into the symplasm mainly through NIP5;1, forms boric acid to be transported toward steles via plasmodesmata, then exported into stellar apoplasm by BOR1. In the boron-rich soils, BOR4 is important for the directional export of boron fromthe roots to prevent the accumulation of boron in the xylem or growing cells. The selected or transgenic cultivars with overexpressed transporters BOR1 or BOR4 or increased sugar alcohol content showed increased boron deficiency or toxicity tolerance. The current study of boron absorption and transport mechanisms in plants has provided clues for the improvement of crop production in boron-deficient or boron-toxic soils by manipulating specific boron transporters or channels
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Keywordsplant   boron   NIP5;1   NIP6;1   BOR1   BOR4     
Received 2009-03-19;
Corresponding Authors: HE Yi-Kun   
Cite this article:   
XIAJin-Chan,HEYi-Kun.Mechanisms of Boron Transport in Plants[J]  Chinese Journal of Biochemistry and Molecular Biol, 2009,V25(08): 702-707
URL:  
http://cjbmb.bjmu.edu.cn/EN/      or     http://cjbmb.bjmu.edu.cn/EN/Y2009/V25/I08/702
Copyright 2010 by Chinese Journal of Biochemistry and Molecular Biol