Journal
PLANT SCIENCE
Volume 168, Issue 2, Pages 397-405Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2004.09.004
Keywords
excess boron; lignin; phenolics; soybean; suberin
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Seedlings of soybean (Glycine max cv. Enrei) were treated with 0.01, 0.05, and 5 mM boron (13) as boric acid. Depression of the growth, increase of the activities of phenylalanine ammonia-lyase and syringaldazine peroxidase, increase of lignin and wall bound phenols resulted from treatment with 5 mM B, compared to the treatments containing 0.05 and 0.01 mM B. Extensive suberization of cells was exclusively observed in root tips of seedlings exposed to 5 mM B. These phenomena may be specific responses of the plant to the stress of excess B and probably are relevant to the strategy of the plant, by which the radial transport of water and B toward conductive tissues is hindered. (C) 2004 Elsevier Ireland Ltd. All rights reserved.
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