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JXB Advance Access published online on May 7, 2004
Journal of Experimental Botany, doi:10.1093/jxb/erh142
© 2004 by Oxford University Press
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Received October 27, 2003; accepted March 3, 2004
© 2004 Society for Experimental Biology

GENE NOTE

Boron nutrition of cultured tobacco BY-2 cells. IV. Genes induced under low boron supply

Masaru Kobayashi 1, Takashi Mutoh 1, and Toru Matoh 1*

1 Laboratory of Plant Nutrition, Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan

* To whom correspondence should be addressed. E-mail: matoh{at}kais.kyoto-u.ac.jp.


  Abstract

Genes whose expression was up-regulated in low boron (B)-acclimated tobacco BY-2 (Nicotiana tabacum L. cv. Bright Yellow 2) cells, which had been selected under a low supply of B, were screened by the cDNA differential subtraction method. Thirteen genes were identified, including early salicylate-inducible glucosyltransferase, glutamine synthetase, glutathione S-transferase, and a pathogenesis-related protein, which might constitute a rescue system for oxidative damage. This indicates that B deficiency might impose cellular redox imbalance on the cells. Two of the 13 genes were induced within 30 min of B removal in the parent cells, indicating fast signal transfer from the cell walls to the cytoplasm.

Key words: Boron, boron deficiency, Nicotiana tabacum, oxidative stress, tobacco BY-2 cultured cells.


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