The synergistic effects of silicon and selenium on enhancing salt tolerance of maize plants

Xu, Shun’an; Zhao, Na; Qin, Dongni; Liu, Shuhan; Jiang, Shumiao; Xu, Li; Sun, Zhaohua; Yan, Dongdong; Hu, Anyong

doi:10.1016/j.envexpbot.2021.104482

Cited by 23 publications

(13 citation statements)

References 70 publications

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“…Furthermore, the degree of destruction of the oxygen-evolving complex can be calculated by comparing the magnitude of the K-point fluorescence intensity by the JIP-measurement data processing method [ 47 ]. In this study, salt stress significantly increased the K-point fluorescence value, which was consistent with the results of Xu et al [ 45 ] in maize. The application of the Si fertilizer markedly lowered the K-point fluorescence value of the salt-stressed cotton seedling ( Figure 9 D and Figure 10 E), indicating that Si can alleviate the damage of oxygen-evolving complexes caused by salt stress to a certain extent, and relieve the suppression of the photosynthetic electron production and transport due to salt stress [ 44 , 45 ].…”

Section: Discussionsupporting

confidence: 93%

“…In this study, salt stress significantly increased the K-point fluorescence value, which was consistent with the results of Xu et al [ 45 ] in maize. The application of the Si fertilizer markedly lowered the K-point fluorescence value of the salt-stressed cotton seedling ( Figure 9 D and Figure 10 E), indicating that Si can alleviate the damage of oxygen-evolving complexes caused by salt stress to a certain extent, and relieve the suppression of the photosynthetic electron production and transport due to salt stress [ 44 , 45 ]. Further, the Psi (Eo) was significantly lower in the salt-treated seedling ( Figure 9 E and Figure 10 E).…”

Section: Discussionsupporting

confidence: 93%

“…Similarly, the PIabs was also improved by Si application with the presence of NaCl ( Figure 9 C and Figure 10 C), indicating a positive role of Si in promoting the primary photochemical reactions of PSII in the waterside. These results were consistent with previous studies reporting that Si could mitigate the adverse effects of salt on photosynthesis and plant growth through enhancing the photochemical efficiency of PSII [ 36 , 45 ]. The oxygen-evolving complex on the PSII donor side is an important part of the PSII core complex and contributes to the catalytic decomposition of H 2 O, which converts the light energy into chemical energy.…”

Section: Discussionsupporting

confidence: 93%

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Ameliorative Effects of Silicon against Salt Stress in Gossypium hirsutum L.

Zhang

et al. 2022

Antioxidants

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Silicon (Si) could alleviate the adverse effect of salinity in many crops, but the effect in cotton remains unclear. In this study, we evaluated the role of Si in regulating the salt stress tolerance of cotton by analyzing the induced morpho-physiological changes. A hydroponic experiment was conducted by using contrasting salt-tolerant cotton genotypes (sensitive Z0102; tolerant Z9807) and four treatments (CK, control; CKSi, 0.4 mM Si; NaCl, 150 mM NaCl; NaClSi, 150 mM NaCl+0.4 mM Si). The results showed that Si significantly enhanced the net photosynthesis rate and improved the growth of cotton seedling under salt stress in both salt-sensitive and salt-tolerant genotypes. Exogenous Si significantly reduced the accumulation of reactive oxygen species (ROS) and decreased the malondialdehyde (MDA) content in salt-stressed cotton. In addition, the application of Si up-regulated the expression of CAT1, SODCC and POD, and significantly enhanced the antioxidant enzymatic activities, such as catalase (CAT) and peroxidase (POD), of the salt-stressed cotton seedlings. Further, Si addition protected the integrity of the chloroplast ultrastructure, including key enzymes in photosynthesis such as ferredoxin-NADP reeducates (FNR), ATP synthase (Mg2+Ca2+-ATPase) and ribulose-1, 5-bisphosphate carboxylase/oxygenase (RubisCO), and the structure and function of the photosynthetic apparatus PSII from salt stress. Moreover, Si significantly increased the effective stomatal density and stomatal aperture in the salt-stressed cotton seedlings. Taken together, Si could likely ameliorate adverse effects of salt stress on cotton by improving the ROS scavenging ability and photosynthetic capacity.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 93%

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Ameliorative Effects of Silicon against Salt Stress in Gossypium hirsutum L.

Zhang

et al. 2022

Antioxidants

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“…GB significantly reduced the Na + /K + ratio in both roots and shoots, which was primarily attributed to the reduction in Na + concentration in the roots and shoots of maize, while the concentration of K + was not significantly increased in maize plants (Figure 2 and Supplementary Figure S5). In a study on effects of silicon and selenium on enhancing salt tolerance of maize plants (Xu et al, 2021), it was reported that Si and Se significantly reduced Na + uptake but had no significant effects on K+ accumulation, which were like our results. These indicated that there would be a complicated mechanism in plants to regulate Na + and K + balance under various environments, which need much further studies.…”

Section: Discussionsupporting

confidence: 89%

Glycine betaine increases salt tolerance in maize (Zea mays L.) by regulating Na+ homeostasis

Zhu

Li²,

Zhang³

et al. 2022

Front. Plant Sci.

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Improving crop salt tolerance is an adaptive measure to climate change for meeting future food demands. Previous studies have reported that glycine betaine (GB) plays critical roles as an osmolyte in enhancing plant salt resistance. However, the mechanism underlying the GB regulating plant Na+ homeostasis during response to salinity is poorly understood. In this study, hydroponically cultured maize with 125 mM NaCl for inducing salinity stress was treated with 100 μM GB. We found that treatment with GB improved the growth of maize plants under non-stressed (NS) and salinity-stressed (SS) conditions. Treatment with GB significantly maintained the properties of chlorophyll fluorescence, including Fv/Fm, ΦPSII, and ΦNPQ, and increased the activity of the antioxidant enzymes for mitigating salt-induced growth inhibition. Moreover, GB decreased the Na+/K+ ratio primarily by reducing the accumulation of Na+ in plants. The results of NMT tests further confirmed that GB increased Na+ efflux from roots under SS condition, and fluorescence imaging of cellular Na+ suggested that GB reduced the cellular allocation of Na+. GB additionally increased Na+ efflux in leaf protoplasts under SS condition, and treatment with sodium orthovanadate, a plasma membrane (PM) H+-ATPase inhibitor, significantly alleviated the positive effects of GB on Na+ efflux under salt stress. GB significantly improved the vacuolar activity of NHX but had no significant effects on the activity of V type H+-ATPases. In addition, GB significantly upregulated the expression of the PM H+-ATPase genes, ZmMHA2 and ZmMHA4, and the Na+/H+ antiporter gene, ZmNHX1. While, the V type H+-ATPases gene, ZmVP1, was not significantly regulated by GB. Altogether these results indicate that GB regulates cellular Na+ homeostasis by enhancing PM H+-ATPases gene transcription and protein activities to improve maize salt tolerance. This study provided an extended understanding of the functions of GB in plant responses to salinity, which can help the development of supportive measures using GB for obtaining high maize yield in saline conditions.

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“…In line with our results, in previous research, pigment. Furthermore, it has been reported that low concentrations of selenium, increases antioxidant activity, protects chloroplast enzymes, and improves the e ciency of photosystem II(Feng et al 2013;Xu et al 2021…”

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confidence: 99%

Seed priming with selenium nanoparticle and plant growth promoting rhizobacteria improve seedling development of foxtail millet (Setaria italica) under salinity stress

Nasibi

Aminian

Mohammadi-Nejad

et al. 2022

Preprint

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Much research has been carried out in agriculture and physiology to minimize the adverse effects of salinity on crops. This study was conducted to investigate the effect of selenium nanoparticles and plant growth-promoting bacteria (PGPRs) pretreatment on increasing the resistance of foxtail millet to salinity stress. Experimental treatments consisted of selenium nanoparticles at a concentration of 1 mg L-1, Bacillus cereus and Pseudomonas fluorescens and three different levels of saline solution with concentrations of 0, 100 and 200mM sodium chloride. In this study, foxmillet seeds were primming with solutions of selenium nanoparticles, a variety of bacteria and a mixture of both, and then the pretreated seeds were planted in pots and after two weeks were affected by salinity stress. After 10 days of salinity stress, plants were harvested for analysis. The results of measuring the growth, biochemical and physiological parameters of this study showed that soaking millet seeds in a solution of selenium nanoparticles can increase the plant's ability to cope with salinity stress by increasing photosynthetic pigments, compatible solutes, reducing oxidative stress, protecting the cell membrane and reducing sodium uptake, and it has more effects in the presence of PGPRs bacteria (such as Bacillus cereus and Pseudomonas fluorescens). Therefore, it is suggested that these two biostimulators be used together for greater effects. In addition, since most of the positive functions of these bacteria were not affected by salinity stress, so this type of bacteria can be used with selenium in saline soils.

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The synergistic effects of silicon and selenium on enhancing salt tolerance of maize plants

Cited by 23 publications

References 70 publications

Ameliorative Effects of Silicon against Salt Stress in Gossypium hirsutum L.

Ameliorative Effects of Silicon against Salt Stress in Gossypium hirsutum L.

Glycine betaine increases salt tolerance in maize (Zea mays L.) by regulating Na+ homeostasis

Seed priming with selenium nanoparticle and plant growth promoting rhizobacteria improve seedling development of foxtail millet (Setaria italica) under salinity stress

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