The multiple effects of hydrogen sulfide on cadmium toxicity in tobacco may be interacted with CaM signal transduction
The multiple effects of hydrogen sulfide on cadmium toxicity in tobacco may be interacted with CaM signal transduction
复制标题
硫化氢对烟草镉毒性的多重影响可能与 CaM 信号转导相互作用
DOI：
10.1016/j.jhazmat.2020.123651
复制
发表时间：
2020
影响因子：
13.6
通讯作者：
Ao Ho
中科院分区：
文献类型：
--
作者：
Wang Hong Rui;Che Yan Hui;Wang Zi Han;Zhang Bei Ning;Feng Fu Juan;Ao Ho
Soilless culture experiments with tobacco were conducted to explore how the signal molecule H2S (0.3, 0.6, 0.9, and 1.2 μM) alleviated the toxicity of Cd2+(50 mg/L). The results suggested that photosynthesis was enhanced as H2S improved the tobacco ΦPSII, ETR, Photo, Cond, and Tr, and that by increasing the NPQ, it consumed considerable amount of energy to enhance plant resistances during Cd2+exposure. Furthermore, H2S increased the gene transcription ofNtSOD3, NtPOD1,andCAT1, to enhance antioxidant enzyme activity, which reduces the generation of the reactive oxygen protective membrane integrity. Additionally, H2S increased the gene expression of the tobacco PC genes, Pr2 and Pr8 promoted the formation of the Cd2+complexes and transportation to the vacuole, resulting in improvedCd-ATPasegene expression, away from organelles, to alleviate the Cd2+poison. Furthermore, H2S regulated the relative absorption of K+and Ca2+, which antagonized the Cd2+, and reduced its transportation to the aboveground plant material. Finally, the expression level of CaM increased with the application of H2S, and was highly correlated with the fitted results of a variety of resistance indicators, thereby indicating that H2S regulatory resistance mechanisms might be associated with Ca2+signal transduction.
