Root Research
Online ISSN : 1880-7186
Print ISSN : 0919-2182
ISSN-L : 0919-2182
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Volume 12, Issue 4
Displaying 1-4 of 4 articles from this issue
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  • Acid soils and aluminum stress in plant roots
    Hideaki MATSUMOTO
    2003 Volume 12 Issue 4 Pages 149-162
    Published: December 22, 2003
    Released on J-STAGE: December 18, 2009
    DOIhttps://doi.org/10.3117/rootres.12.149
    JOURNAL FREE ACCESS
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    Due to burst of world population and increasing environmental stresses, it is thought that good arable lands have been almost used up and unused problem soils are remained in the world. Acid soils which are one of the typical problem soils occupy 30-40% of world's ice-free land. Aluminum (Al) ion is solubilized in the soil water according to the acidification of soil and inhibits the root growth remarkably. Under such situation, attention has been paid to improve the agricultural production in acid soils. The Al tolerant mechanism in higher plants has been intensively investigated and very important Al tolerant gene encoding Al dependent malate transporter in Al tolerant wheat root was discovered recently and its molecular analysis and transformation in Al sensitive plants are now actively carried out.
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  • The production of Xylem Sap lectin in Cucumber Root and Its Activity
    Atsushi ODA, Shinobu SATOH
    2003 Volume 12 Issue 4 Pages 163-168
    Published: December 22, 2003
    Released on J-STAGE: December 18, 2009
    DOIhttps://doi.org/10.3117/rootres.12.163
    JOURNAL FREE ACCESS
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    Xylem sap contains macromolecules such as proteins and polysaccharides. We have analyzed the root specific gene expression of a xylem sap protein (XSP30) in cucumber. The expression of XSP30 in roots oscillates in a diurnal pattern. The amplitude of the diurnal expression is regulated by leaf gibberellin. The XSP30 promoter directed specific expression of a β-glucuronidase reporter gene in xylem parenchyma and pericycle cells in the central cylinder of mature transgenic hairy roots. The lectin activity of XSP30 was analyzed by lectin blot coupled with immunological detection of XSP30. The recognition site of XSP30 was N-acetylglucosamine of the glycoproteins. We also found that the glycoproteins having the recognition site of XSP30 were abundant in leaf parenchyma cells. From these result, we discuss the possible functions of the xylem sap lectin.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    2003 Volume 12 Issue 4 Pages 169-171
    Published: December 22, 2003
    Released on J-STAGE: December 18, 2009
    DOIhttps://doi.org/10.3117/rootres.12.169
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    2003 Volume 12 Issue 4 Pages 180-225
    Published: December 22, 2003
    Released on J-STAGE: December 18, 2009
    DOIhttps://doi.org/10.3117/rootres.12.180
    JOURNAL FREE ACCESS
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