Nitric oxide production is not required for dihydrosphingosine- induced cell death in tobacco BY-2 cells

被引：12

作者：

Da Silva, Daniel ^{[1
]}

Lachaud, Christophe ^{[1
]}

Cotelle, Valerie ^{[1
]}

Briere, Christian ^{[1
]}

Grat, Sabine ^{[1
]}

Mazars, Christian ^{[1
]}

Thuleau, Patrice ^{[1
]}

机构：

[1] Univ Toulouse, UPS, CNRS, UMR 5546,Lab Rech Sci Vegetales, Castanet Tolosan, France

来源：

PLANT SIGNALING & BEHAVIOR | 2011年 / 6卷 / 05期

关键词：

tobacco BY-2 cells; sphingolipids; LCBs; dihydrosphingosine; sphinganine; apoptosis; programmed cell death (PCD); nitric oxide (NO);

D O I：

10.4161/psb.6.5.15126

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Sphinganine or dihydrosphingosine (d18: 0, DHS), one of the most abundant free sphingoid Long Chain Base (LCB) in plants, is known to induce a calcium-dependent programmed cell death (PCD) in tobacco BY-2 cells. We have recently shown that DHS triggers a production of H2O2, via the activation of NADPH oxidase(s). However, this production of H2O2 is not correlated with the DHS-induced cell death but would rather be associated with basal cell defense mechanisms. In the present study, we extend our current knowledge of the DHS signaling pathway, by demonstrating that DHS also promotes a production of nitric oxide (NO) in tobacco BY-2 cells. As for H2O2, this NO production is not necessary for cell death induction.

引用

页码：736 / 739

页数：4

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