The impact of cerium oxide nanoparticles on the physiology of soybean (Glycine max (L.) Merr.) under different soil moisture conditions
The impact of cerium oxide nanoparticles on the physiology of soybean (Glycine max (L.) Merr.) under different soil moisture conditions
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DOI：
10.1007/s11356-017-0501-5
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发表时间：
2018-01-01
影响因子：
5.8
通讯作者：
Ma, Xingmao
中科院分区：
文献类型：
--
作者：
Cao, Zhiming;Rossi, Lorenzo;Ma, Xingmao
持续的全球气候变化引起了人们对农业土壤含水量下降的关注。研究了两种不同类型的氧化铈纳米颗粒（CeO（2）NPs）在不同水分含量下对大豆生理的影响。一个CeO2NP在表面上带正电荷，另一个由于聚乙烯吡咯烷酮（PVP）涂层而带负电荷。结果表明，CeO（2）NPs对植物光合作用和水分利用效率（WUE）的影响取决于土壤水分含量。两种类型的CeO（2）NPs在水分含量高于田间持水量（theta（fc））的70%时对植物光合作用表现出一致的积极影响。在55% θ（fc）下没有观察到CeO（2）NPs的类似积极影响，表明CeO（2）NPs的生理影响取决于土壤水分含量。CeO（2）NPs对最大羧化速率（V（Cmax））有影响，表明CeO（2）NPs影响了光合作用中控制碳同化的Rubisco活性。总之，CeO（2）NPs对大豆光合作用和水分利用效率有显著影响，且这种影响受土壤水分含量的影响。
The ongoing global climate change raises concerns over the decreasing moisture content in agricultural soils. Our research investigated the physiological impact of two types of cerium oxide nanoparticles (CeO(2)NPs) on soybean at different moisture content levels. One CeO2NP was positively charged on the surface and the other negatively charged due to the polyvinylpyrrolidone (PVP) coating. The results suggest that the effect of CeO(2)NPs on plant photosynthesis and water use efficiency (WUE) was dependent upon the soil moisture content. Both types of CeO(2)NPs exhibited consistently positive impacts on plant photosynthesis at the moisture content above 70% of field capacity (theta(fc)). Similar positive impact of CeO(2)NPs was not observed at 55% theta(fc), suggesting that the physiological impact of CeO(2)NPs was dependent upon the soil moisture content. The results also revealed that V (Cmax) (maximum carboxylation rate) was affected by CeO(2)NPs, indicating that CeO(2)NPs affected the Rubisco activity which governs carbon assimilation in photosynthesis. In conclusion, CeO(2)NPs demonstrated significant impacts on the photosynthesis and WUE of soybeans and such impacts were affected by the soil moisture content.