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Silica nanoparticles promote wheat growth by mediating hormones and sugar metabolism
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Silica nanoparticles promote wheat growth by mediating hormones and sugar metabolism
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Journal Article
Silica nanoparticles promote wheat growth by mediating hormones and sugar metabolism
2023
Overview
Background
Silica nanoparticles (SiNPs) have been demonstrated to have beneficial effects on plant growth and development, especially under biotic and abiotic stresses. However, the mechanisms of SiNPs-mediated plant growth strengthening are still unclear, especially under field condition. In this study, we evaluated the effect of SiNPs on the growth and sugar and hormone metabolisms of wheat in the field.
Results
SiNPs increased tillers and elongated internodes by 66.7% and 27.4%, respectively, resulting in a larger biomass. SiNPs can increase the net photosynthetic rate by increasing total chlorophyll contents. We speculated that SiNPs can regulate the growth of leaves and stems, partly by regulating the metabolisms of plant hormones and soluble sugar. Specifically, SiNPs can increase auxin (IAA) and fructose contents, which can promote wheat growth directly or indirectly. Furthermore, SiNPs increased the expression levels of key pathway genes related to soluble sugars (
SPS
,
SUS
, and α-
glucosidase
), chlorophyll (
CHLH
,
CAO
, and
POR
), IAA (
TIR1
), and abscisic acid (ABA) (
PYR
/
PYL
,
PP2C
,
SnRK2
, and
ABF
), whereas the expression levels of genes related to CTKs (
IPT
) was decreased after SiNPs treatment.
Conclusions
This study shows that SiNPs can promote wheat growth and provides a theoretical foundation for the application of SiNPs in field conditions.
