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In Site Bioimaging of Hydrogen Sulfide Uncovers Its Pivotal Role in Regulating Nitric Oxide-Induced Lateral Root Formation

文献类型： 外文期刊

作者： Li, Yan-Jun 1 ; Chen, Jian 2 ; Xian, Ming 3 ; Zhou, Li-Gang 4 ; Han, Fengxiang X. 5 ; Gan, Li-Jun 1 ; Shi, Zhi-Qi 2 ;

作者机构： 1.Nanjing Agr Univ, Coll Life Sci, Nanjing, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Food Qual & Safety, Nanjing, Jiangsu, Peoples R China

3.Washington State Univ, Dept Chem, Pullman, WA 99164 USA

4.China Agr Univ, Coll Agron & Biotechnol, Dept Plant Pathol, Beijing 100094, Peoples R China

5.Jackson State Univ, Dept Chem & Biochem, Jackson, MS USA

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2014 年 9 卷 2 期

页码：

收录情况： SCI

摘要： Hydrogen sulfide (H2S) is an important gasotransmitter in mammals. Despite physiological changes induced by exogenous H2S donor NaHS to plants, whether and how H2S works as a true cellular signal in plants need to be examined. A selfdeveloped specific fluorescent probe (WSP-1) was applied to track endogenous H2S in tomato (Solanum lycopersicum) roots in site. Bioimaging combined with pharmacological and biochemical approaches were used to investigate the cross-talk among H2S, nitric oxide (NO), and Ca2+ in regulating lateral root formation. Endogenous H2S accumulation was clearly associated with primordium initiation and lateral root emergence. NO donor SNP stimulated the generation of endogenous H2S and the expression of the gene coding for the enzyme responsible for endogenous H2S synthesis. Scavenging H2S or inhibiting H2S synthesis partially blocked SNP-induced lateral root formation and the expression of lateral root-related genes. The stimulatory effect of SNP on Ca2+ accumulation and CaM1 (calmodulin 1) expression could be abolished by inhibiting H2S synthesis. Ca2+ chelator or Ca2+ channel blocker attenuated NaHS-induced lateral root formation. Our study confirmed the role of H2S as a cellular signal in plants being a mediator between NO and Ca2+ in regulating lateral root formation.

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