Chinese Bulletin of Botany ›› 2007, Vol. 24 ›› Issue (04): 444-451.
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Jing Jiang Shuan Han Chunpeng Song
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Abstract: Using laser scanning confocal microscopy, we tested the mechanism of mitogen-activated protein kinase (MAPK) regulation of salicylic acid (SA)- or abscisic acid (ABA)-induced reactive oxygen species H2O2 elevation in Vicia guard cells. SB202190, a special inhibitor of p38 MAPK, blocked the elevation of H2O2 by SA but not ABA, whereas SB202190 alone could not increase H2O2 or Ca2+ level in guard cells. The combination of BAPTA, the chelator of Ca2+, and SA+SB202190 could not increase H2O2 level, which suggests that activation of p38 MAPK-like especially modulates H2O2 signaling in plant cells, regardless of Ca2+ level, similar to the mechanism in mammalian or yeast cells. To our knowledge, this is the first report that SB202190 regulates SAinduced ROS signaling in plant cells.
Jing Jiang Shuan Han Chunpeng Song. SB202190 Modulate Salicylic Acid-induced H2O2 Generation SB202190 Modulate Salicylic Acid-induced H2O2 Generation[J]. Chinese Bulletin of Botany, 2007, 24(04): 444-451.
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