Silicon‐induced root nodulation and synthesis of essential amino acids in a legume is associated with higher herbivore abundance

Abstract

/0000-0002-5117-687X, Johnson, Scott N., Ryalls, James M. W. et al. (4 more authors) (2017) Silicon-induced root nodulation and synthesis of essential amino acids in a legume is associated with higher herbivore abundance. Functional Ecology.

Silicon enrichment alters functional traits in legumes depending on plant genotype and symbiosis with nitrogen‐fixing bacteria

“…In contrast to this study, Johnson et al. (2017, 2018) showed that Si supplementation increased biomass in lucerne, but not concentrations of foliar Si, possibly because they harvested plants earlier (2‐month‐old plants) than this study (3‐month‐old plants). Furthermore, increased growth (shoot, root and total dry biomass) was associated with increased foliar concentrations of Si.…”

Silicon enrichment alters functional traits in legumes depending on plant genotype and symbiosis with nitrogen‐fixing bacteria

“…In contrast to this study, Johnson et al. (2017, 2018) showed that Si supplementation increased biomass in lucerne, but not concentrations of foliar Si, possibly because they harvested plants earlier (2‐month‐old plants) than this study (3‐month‐old plants). Furthermore, increased growth (shoot, root and total dry biomass) was associated with increased foliar concentrations of Si.…”

Silicon supplementation and jasmonate activation synergistically increase phenolic defences against a legume herbivore

“…silicification may reduce the high metabolic cost of C‐based compounds in cell wall construction; Putra et al, 2022). Plant growth rates over 12 weeks, and Si‐associated increases in above‐ and below‐ground mass, were consistent with previous studies with M. sativa (Johnson et al, 2017; Johnson, Ryalls, et al, 2018; Ryalls et al, 2015). Studies with other legumes have also demonstrated increases in plant mass in response to Si supplementation (Guérin et al, 2014; Rasoolizadeh et al, 2018).…”

Benefits from Below: Silicon Supplementation Maintains Legume Productivity under Predicted Climate Change Scenarios

“…Si may have promoted plant growth to such an extent that Si became ‘diluted’ in foliage, or else had not had time to accumulate in plant tissues over the duration of the study. A similar trend in foliar Si was previously observed in this system however, associated with rapid plant growth, increases in root nodulation and synthesis of amino acids ( Johnson et al, 2017 ). In addition to any increased nutritional value, the lower concentrations of Si in foliage of Si+ plants may explain why Si supplementation did not increase plant resistance to aphids.…”

“…Results from this study suggest that Si supplementation may mitigate the negative impacts of eT on plant growth in M. sativa which was potentially due to stimulation of root nodulation, despite the reduction in nodulation at higher temperatures reported in previous studies (e.g., Ryalls et al, 2013b ). Even more advantageously, this increased nodulation did not increase susceptibility to an aphid pest at eT, which had previously been observed for Si-induced increases in nodulation at ambient temperatures ( Johnson et al, 2017 ).…”

Silicon enrichment alters functional traits in legumes depending on plant genotype and symbiosis with nitrogen‐fixing bacteria

“…In contrast to this study, Johnson et al. (2017, 2018) showed that Si supplementation increased biomass in lucerne, but not concentrations of foliar Si, possibly because they harvested plants earlier (2‐month‐old plants) than this study (3‐month‐old plants). Furthermore, increased growth (shoot, root and total dry biomass) was associated with increased foliar concentrations of Si.…”

Silicon supplementation and jasmonate activation synergistically increase phenolic defences against a legume herbivore

“…silicification may reduce the high metabolic cost of C‐based compounds in cell wall construction; Putra et al, 2022). Plant growth rates over 12 weeks, and Si‐associated increases in above‐ and below‐ground mass, were consistent with previous studies with M. sativa (Johnson et al, 2017; Johnson, Ryalls, et al, 2018; Ryalls et al, 2015). Studies with other legumes have also demonstrated increases in plant mass in response to Si supplementation (Guérin et al, 2014; Rasoolizadeh et al, 2018).…”

Benefits from Below: Silicon Supplementation Maintains Legume Productivity under Predicted Climate Change Scenarios

“…Si may have promoted plant growth to such an extent that Si became ‘diluted’ in foliage, or else had not had time to accumulate in plant tissues over the duration of the study. A similar trend in foliar Si was previously observed in this system however, associated with rapid plant growth, increases in root nodulation and synthesis of amino acids ( Johnson et al, 2017 ). In addition to any increased nutritional value, the lower concentrations of Si in foliage of Si+ plants may explain why Si supplementation did not increase plant resistance to aphids.…”

“…Results from this study suggest that Si supplementation may mitigate the negative impacts of eT on plant growth in M. sativa which was potentially due to stimulation of root nodulation, despite the reduction in nodulation at higher temperatures reported in previous studies (e.g., Ryalls et al, 2013b ). Even more advantageously, this increased nodulation did not increase susceptibility to an aphid pest at eT, which had previously been observed for Si-induced increases in nodulation at ambient temperatures ( Johnson et al, 2017 ).…”

Silicon enrichment alters functional traits in legumes depending on plant genotype and symbiosis with nitrogen‐fixing bacteria

“…In contrast to this study, Johnson et al. (2017, 2018) showed that Si supplementation increased biomass in lucerne, but not concentrations of foliar Si, possibly because they harvested plants earlier (2‐month‐old plants) than this study (3‐month‐old plants). Furthermore, increased growth (shoot, root and total dry biomass) was associated with increased foliar concentrations of Si.…”

Silicon supplementation and jasmonate activation synergistically increase phenolic defences against a legume herbivore

“…silicification may reduce the high metabolic cost of C‐based compounds in cell wall construction; Putra et al, 2022). Plant growth rates over 12 weeks, and Si‐associated increases in above‐ and below‐ground mass, were consistent with previous studies with M. sativa (Johnson et al, 2017; Johnson, Ryalls, et al, 2018; Ryalls et al, 2015). Studies with other legumes have also demonstrated increases in plant mass in response to Si supplementation (Guérin et al, 2014; Rasoolizadeh et al, 2018).…”

Benefits from Below: Silicon Supplementation Maintains Legume Productivity under Predicted Climate Change Scenarios

“…Si may have promoted plant growth to such an extent that Si became ‘diluted’ in foliage, or else had not had time to accumulate in plant tissues over the duration of the study. A similar trend in foliar Si was previously observed in this system however, associated with rapid plant growth, increases in root nodulation and synthesis of amino acids ( Johnson et al, 2017 ). In addition to any increased nutritional value, the lower concentrations of Si in foliage of Si+ plants may explain why Si supplementation did not increase plant resistance to aphids.…”

“…Results from this study suggest that Si supplementation may mitigate the negative impacts of eT on plant growth in M. sativa which was potentially due to stimulation of root nodulation, despite the reduction in nodulation at higher temperatures reported in previous studies (e.g., Ryalls et al, 2013b ). Even more advantageously, this increased nodulation did not increase susceptibility to an aphid pest at eT, which had previously been observed for Si-induced increases in nodulation at ambient temperatures ( Johnson et al, 2017 ).…”