Table 2.2
Highlights of silicon-mediated mitigation of minor abiotic stress conditions
Stress
Experimental study
Plant species
Silicon
application
Effect of silicon application
References
Wounding Effect of silicon on mitigation of
wounding stress
O. sativa
0.5 and 2 mM
Na
2 SiO
3
Improved leaf chlorophyll content and
reduced oxidative stress
Kim et al.
(2016)
Effect of silicon on local and systemic
response to mechanical stress in
tobacco
Nicotiana
rustica
1 mM Na
2 SiO
3
Decreased production of peroxidases,
polyphenol oxidase and augmented lignin
accumulation in local response
Hajiboland
et al. (2017)
UV-B
Effect of silicon on alleviating UV-B
radiation damage
Glycine max
1.7 mM K
2 SiO
3
Reduced accumulation of cyclobutane
pyrimidine dimers (CPDs), increased
production of UV-B absorbing compounds,
increased photolyase gene expression
Chen et al.
(2016)
Role of silicon nanoparticles on
alleviating UV-B stress
Triticum
aestivum
10
μM SiNPs
Reduced oxidative stress, enhanced
antioxidant production, increased nitric
oxide production, overall SiNP appear to be
better than Si
Tripathi et al.
(2017)
Nutrient
Role of silicon in decreasing iron
deficiency responses in soybean
plants
G. max
1 mM Na
2 SiO
3
Improved biomass and iron concentration,
improved photosynthesis
Muneer and
Jeong (2015)
Effect of silicon on potassium
deficiency in sorghum
S. bicolor
1 mM H
2 SiO
3
Improved potassium concentration in xylem
sap and improved growth and water status
Chen et al.
(2016)
Role of silicon in phosphorus uptake
under low P conditions
T. aestivum
Na
2 SiO
3
(400 mg Si kg
À1
dry soil)
Improved P uptake and increased expression
of Pi transporter genes
Kostic et al.
(2017)
Role of silicon in nitrogen uptake
under low N conditions
B. napus
1.7 mM
Na
2 SiO
3
Improved uptake of N and increase
expression of nitrate transporter gene
Haddad et al.
(2018)
Effect of silicon on plants growing
under phosphorus deficiency
conditions
S. lycopersicum
1.5 mM K
2 SiO
3
Increased photosynthesis, biomass, reduced
ROS and malondialdehyde levels and
enhanced uptake of most essential elements
Zhang et al.
(2019)
Effect of silicon on rice plants
growing under sulphur deficiency
O. sativa
Lower accumulation of stress
phytohormones, enhanced growth and
Réthoré et al.
(2020)
(continued)
2 Silicon: A Plant Nutritional “Non-Entity” for Mitigating Abiotic
33
Highlights of silicon-mediated mitigation of minor abiotic stress conditions
Stress
Experimental study
Plant species
Silicon
application
Effect of silicon application
References
Wounding Effect of silicon on mitigation of
wounding stress
O. sativa
0.5 and 2 mM
Na
2 SiO
3
Improved leaf chlorophyll content and
reduced oxidative stress
Kim et al.
(2016)
Effect of silicon on local and systemic
response to mechanical stress in
tobacco
Nicotiana
rustica
1 mM Na
2 SiO
3
Decreased production of peroxidases,
polyphenol oxidase and augmented lignin
accumulation in local response
Hajiboland
et al. (2017)
UV-B
Effect of silicon on alleviating UV-B
radiation damage
Glycine max
1.7 mM K
2 SiO
3
Reduced accumulation of cyclobutane
pyrimidine dimers (CPDs), increased
production of UV-B absorbing compounds,
increased photolyase gene expression
Chen et al.
(2016)
Role of silicon nanoparticles on
alleviating UV-B stress
Triticum
aestivum
10
μM SiNPs
Reduced oxidative stress, enhanced
antioxidant production, increased nitric
oxide production, overall SiNP appear to be
better than Si
Tripathi et al.
(2017)
Nutrient
Role of silicon in decreasing iron
deficiency responses in soybean
plants
G. max
1 mM Na
2 SiO
3
Improved biomass and iron concentration,
improved photosynthesis
Muneer and
Jeong (2015)
Effect of silicon on potassium
deficiency in sorghum
S. bicolor
1 mM H
2 SiO
3
Improved potassium concentration in xylem
sap and improved growth and water status
Chen et al.
(2016)
Role of silicon in phosphorus uptake
under low P conditions
T. aestivum
Na
2 SiO
3
(400 mg Si kg
À1
dry soil)
Improved P uptake and increased expression
of Pi transporter genes
Kostic et al.
(2017)
Role of silicon in nitrogen uptake
under low N conditions
B. napus
1.7 mM
Na
2 SiO
3
Improved uptake of N and increase
expression of nitrate transporter gene
Haddad et al.
(2018)
Effect of silicon on plants growing
under phosphorus deficiency
conditions
S. lycopersicum
1.5 mM K
2 SiO
3
Increased photosynthesis, biomass, reduced
ROS and malondialdehyde levels and
enhanced uptake of most essential elements
Zhang et al.
(2019)
Effect of silicon on rice plants
growing under sulphur deficiency
O. sativa
Lower accumulation of stress
phytohormones, enhanced growth and
Réthoré et al.
(2020)
(continued)
2 Silicon: A Plant Nutritional “Non-Entity” for Mitigating Abiotic
33