Boron nutrition of cultured tobacco [Nicotiana tabacum] BY-2 cells, 4: Calcium is involved in early responses to boron deprivation
2010
Koshiba, T., Kyoto Univ. (Japan) | Kobayashi, M. | Ishihara, A. | Matoh, T.
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 Casup(2+) or by adding a Casup(2+) channel blocker. Analysis using aequorin-expressing cells showed that B-deprived cells took up more Casup(2+) than control cells. These results suggest that Casup(2+) influx plays a roll in B deprivation stress signaling.
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