Nitric oxide alleviates cadmium toxicity in tall fescue photosystem II on the electron donor side
Nitric oxide alleviates cadmium toxicity in tall fescue photosystem II on the electron donor side
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一氧化氮减轻高羊茅光系统 II 电子供体侧的镉毒性
DOI：
10.1016/j.envexpbot.2017.02.008
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发表时间：
2017-05
影响因子：
5.7
通讯作者：
Sun Jie
中科院分区：
文献类型：
--
作者：
Zhuo Yaqi;Qiu Shou;Arnombo Erick;Zhu Qing;Tang Diyong;Huang Meiyu;Han Xiaole;Chen Liang;Wang Sha;Chen Ke;Sun Jie
高羊茅（Festuca arundinacea）在重金属植物修复方面具有广阔的前景。一氧化氮（NO）在植物生长、发育和细胞机制的调节中发挥多功能作用。在这项研究中，我们评估了高羊茅在镉 (Cd) 植物修复中的潜在用途以及一氧化氮对此过程的贡献。采用不同浓度的Cd2+来研究Cd2+的毒性作用及其在高羊茅中的吸收。以硝普钠（SNP）作为外源NO供体，NG-硝基-L-精氨酸甲酯（L-NAME）作为NO合成抑制剂，评价NO在高羊茅植物修复中的作用。测定了高羊茅的生长参数和光系统 II (PSII) 活性。高羊茅的性能因 Cd2+ 浓度的增加而受到抑制。 SNP处理改善了高羊茅对抗Cd2+胁迫的行为，而L-NAME处理在某些情况下导致相反的结果。此外，SNP处理降低了高羊茅枝条的Cd2+含量。 OJIP曲线研究表明，Cd2+处理对PSII分组具有负面影响，NO处理可以减轻Cd2+对PSII的毒性。此外，JIP试验还描述了Cd2+对高羊茅的毒性作用以及NO对重金属胁迫的保护作用。总体而言，高羊茅对 Cd2+ 胁迫表现出较高的耐受性，NO 保护羊茅免受 Cd2+ 的侵害。高羊茅 PSII 中的 Cd2+ 毒性主要集中在电子供体侧。 NO减轻了PSII电子供体侧的Cd2+毒性，这可能是由于其在调节活性氧水平和毒性方面的作用。
Tall fescue (Festuca arundinacea) possesses remarkable prospects in heavy metal phytoremediation. Nitric oxide (NO) plays multifunctional roles in plant growth, development and the regulation of cellular mechanisms. In this study, we evaluated the potential use of tall fescue for cadmium (Cd) phytoremediation and the contribution of NO to the process. Different concentrations of Cd2+were applied to study the toxic effects of Cd2+and its absorption in tall fescue. Sodium nitroprusside (SNP) was used as exogenous NO donor and NG-nitro-l-arginine-methyl ester (L-NAME) was used as a NO synthesis inhibitor to evaluate the role of NO in tall fescue phytoremediation. The tall fescue growth parameters and photosystem II (PSII) activities were determined. The performance of the tall fescue was inhibited by an increase in the Cd2+concentration. The SNP treatment improved the behaviour of tall fescue against Cd2+stress, while the L-NAME treatment led to the opposite results in certain cases. Additionally, SNP treatment reduced the Cd2+contents of the tall fescue shoots. The study of OJIP curves showed that Cd2+treatment possessed negative effects on PSII grouping and NO treatment could alleviate Cd2+toxicity on PSII. Moreover, JIP test depicted toxic effect of Cd2+upon tall fescue and the protective role of NO against heavy metal stress. Overall, the tall fescue exhibited high tolerance to Cd2+stress and NO protected the fescue from Cd2+. Cd2+toxicity in the tall fescue PSII is primarily localized on the electron donor side. NO alleviated Cd2+toxicity on the PSII electron donor side, which may be due to its role in the regulation of the level and toxicity of reactive oxygen species.
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影响因子：
64.8
作者：
Delledonne, M;Xia, YJ;Lamb, C
通讯作者：
Lamb, C
影响因子：
3.7
作者：
Żurek G;Rybka K;Pogrzeba M;Krzyżak J;Prokopiuk K
通讯作者：
Prokopiuk K
DOI：
10.1080/11263500802150225
发表时间：
2008-07
期刊：
Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology
影响因子：
--
作者：
M. Rai;Sudhir S. Shende;R. Strasser
通讯作者：
M. Rai;Sudhir S. Shende;R. Strasser
内生真菌改善黑麦草的生长和金属吸收
影响因子：
3.7
作者：
Ren, Anzhi;Li, Chuan;Gao, Yubao
通讯作者：
Gao, Yubao
影响因子：
4.3
作者：
J. Voigt;K. Nagel
通讯作者：
J. Voigt;K. Nagel