Boron Nutrition of Cultured Tobacco BY-2 Cells. VI. Calcium is Involved in Early Responses to Boron Deprivation

Boron (B) deprivation induces various responses in plant cells, some of which can be observed very early. However, it has been unknown what kind of signal is generated by the stress. We found that B deprivation induced the expression of stress-responsive genes within 1 h in suspension-cultured tobac...

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Bibliographic Details
Published in:Plant and cell physiology 2010-02, Vol.51 (2), p.323-327
Main Authors: Koshiba, Taichi, Kobayashi, Masaru, Ishihara, Atsushi, Matoh, Toru
Format: Article
Language:English
Subjects:
Boron - metabolism
Boron deficiency
Calcium - metabolism
Calcium influx
Calcium Signaling
Cells, Cultured
Gene Expression Regulation, Plant
Nicotiana - metabolism
Pectic polysaccharides
Stress signaling
Stress, Physiological
Tobacco
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Summary:Boron (B) deprivation induces various responses in plant cells, some of which can be observed very early. However, it has been unknown what kind of signal is generated by the stress. We found that B deprivation induced the expression of stress-responsive genes within 1 h in suspension-cultured tobacco BY-2 cells. The induction was largely suppressed by withholding medium Ca2+ or by adding a Ca2+ channel blocker. Analysis using aequorin-expressing cells showed that B-deprived cells took up more Ca2+ than control cells. These results suggest that Ca2+ influx plays a role in B deprivation stress signaling.
ISSN:0032-0781
1471-9053
DOI:10.1093/pcp/pcp179