Effects of Si fertilization on Si in soil solution, Si uptake by rice, and resistance of rice to biotic stresses in Southern Vietnam

Klotzbücher, Anika; Klotzbücher, Thimo; Jahn, Reinhold; Xuan, Le Dieu; Cuong, Le Quoc; Chien, Ho Van; Hinrichs, Martin; Sann, Christina; Vetterlein, Doris

doi:10.1007/s10333-017-0610-2

Cited by 25 publications

(16 citation statements)

References 28 publications

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“…Based on the take-up capacity of Si, plants are categorized as high, intermediate, or non-Si accumulators (Marafon and Endres, 2013; Table 1 ). Previously, the active uptake of Si has been demonstrated in different plants such as rice (Klotzbucher et al, 2018), wheat (Rains et al, 2006), maize (Mitani et al, 2009), and barley (Chiba et al, 2009), while tomato limits the transport of Si from the roots to shoots (Wang et al, 2015a). Liang et al (2005a) and Mitani and Ma (2005) reported different results for cucumber plants.…”

Section: Silicon Uptake Transport and Assimilation In Plantsmentioning

confidence: 99%

Silicon and Salinity: Crosstalk in Crop-Mediated Stress Tolerance Mechanisms

et al. 2019

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Salinity stress hinders the growth potential and productivity of crop plants by influencing photosynthesis, disturbing the osmotic and ionic concentrations, producing excessive oxidants and radicals, regulating endogenous phytohormonal functions, counteracting essential metabolic pathways, and manipulating the patterns of gene expression. In response, plants adopt counter mechanistic cascades of physio-biochemical and molecular signaling to overcome salinity stress; however, continued exposure can overwhelm the defense system, resulting in cell death and the collapse of essential apparatuses. Improving plant vigor and defense responses can thus increase plant stress tolerance and productivity. Alternatively, the quasi-essential element silicon (Si)—the second-most abundant element in the Earth’s crust—is utilized by plants and applied exogenously to combat salinity stress and improve plant growth by enhancing physiological, metabolomic, and molecular responses. In the present review, we elucidate the potential role of Si in ameliorating salinity stress in crops and the possible mechanisms underlying Si-associated stress tolerance in plants. This review also underlines the need for future research to evaluate the role of Si in salinity stress in plants and the identification of gaps in the understanding of this process as a whole at a broader field level.

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Section: Silicon Uptake Transport and Assimilation In Plantsmentioning

confidence: 99%

Silicon and Salinity: Crosstalk in Crop-Mediated Stress Tolerance Mechanisms

et al. 2019

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“…Furthermore, in our experiments, although the effects of soil silicon were small compared to the relatively large effects of host resistance in reducing the severity of blast and bacterial blight; nevertheless, soil silicon added to the resistance, particularly against the more virulent strain of bacterial blight, and thereby improved seedling growth. Similar effects of silicon in reducing disease severity have been documented across a range of rice pathogens [8,15,21,22,32,[79][80][81][82]87].…”

Section: Silicon Improves General Rice Plant Healthmentioning

confidence: 54%

“…This was apparent for IR22 (a non-significant trend in Figure 1) and IR50404 (Tables S7 and S8) and suggests that high concentrations of silicon in the soil could slow growth rates as the silicon is assimilated into the plant. These effects might depend on the age of seedlings in the experiments; for example, in experiments using silica gel, and thereby avoiding the confounding effects of any associated nutrients, Horgan et al (2017) [66] found that silicon reduced the vigor of early seedlings grown in pots; meanwhile, Klotzbücher et al (2018) [15] found no effect of silicon on rice growth in field plots with older plants. The effects may also relate to inhibition of seedling growth only under very high soil silicon conditions.…”

Section: Direct Effects Of Soil Silicon On Rice Growthmentioning

confidence: 99%

Combined Effects of Soil Silicon and Host Plant Resistance on Planthoppers, Blast and Bacterial Blight in Tropical Rice

Quan

Dossa

Mundaca

et al. 2022

Insects

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Soil silicon enhances rice defenses against a range of biotic stresses. However, the magnitude of these effects can depend on the nature of the rice variety. We conducted a series of greenhouse experiments to examine the effects of silicon on planthoppers (Nilaparvata lugens [BPH] and Sogatella furcifera [WBPH]), a leafhopper (Nephotettix virescens [GLH]), blast disease (Magnaporthe grisea) and bacterial blight (Xanthomonas oryzae) in susceptible and resistant rice. We added powdered silica gel (SiO2) to paddy soil at equivalent to 0.25, 1.0, and 4.0 t ha−1. Added silicon reduced BPH nymph settling, but the effect was negligible under high nitrogen. In a choice experiment, BPH egg-laying was lower than untreated controls under all silicon treatments regardless of nitrogen or variety, whereas, in a no-choice experiment, silicon reduced egg-laying on the susceptible but not the resistant (BPH32 gene) variety. Stronger effects in choice experiments suggest that silicon mainly enhanced antixenosis defenses. We found no effects of silicon on WBPH or GLH. Silicon reduced blast damage to susceptible and resistant (Piz, Piz-5 and Pi9 genes) rice. Silicon reduced damage from a virulent strain of bacterial blight but had little effect on a less virulent strain in susceptible and resistant (Xa4, Xa7 and Xa4 + Xa7 genes) varieties. When combined with resistance, silicon had an additive effect in reducing biomass losses to plants infested with bacterial blight (resistance up to 50%; silicon 20%). We discuss how silicon-containing soil amendments can be combined with host resistance to reduce biotic stresses in rice.

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“…In some Vietnamese sites, the concentrations of plant-available Si in the topsoil were below critical values proposed in literature (Marxen et al 2016), suggesting that Si might limit the growth of the rice plants. Addition of Si fertilizers (silica gel) enhanced the Si uptake and growth of rice plants at one Si-deficient site in Northern Vietnam (Marxen et al 2016), yet showed no effects at another site in Southern Vietnam (Klotzbücher et al 2018a, this issue). The reasons for the different responses of rice plants to Si fertilisation between sites are uncertain and deserve the attention of future research.…”

Section: Provisioning Servicesmentioning

confidence: 92%