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JXB Advance Access originally published online on May 7, 2004
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Journal of Experimental Botany, Vol. 55, No. 401, pp. 1441-1443, June 1, 2004
© 2004 Oxford University Press

GENE NOTE

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

Received 27 October 2003; Accepted 3 March 2004

Masaru Kobayashi, Takashi Mutoh and Toru Matoh*

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. Fax:+81 75 753 6128. E-mail: matoh{at}kais.kyoto-u.ac.jp
Abbreviations: B, boron; GST, glutathione S-transferase; RG-II, rhamnogalacturonan II; TOGT, tobacco glucosyltransferase.

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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