Abstract
Sclerotinia stem rot, caused by Sclerotinia sclerotiorum , is a devastating disease in rapeseed. The objective of this study was to investigate the role and the mechanism of silicon (Si) in alleviating the disease severity of S. sclerotiorum in rapeseed. In the absorption assays, the rapeseed that absorbed 10 mM of K 2 SiO 3 exhibited an 86% decrease in lesion size on infected leaves as compared with controls. In the spray assay, the lesion length on rapeseed stems was reduced by 30.5–32.9% with the use of 100 mM of a foliar Si fertilizer as compared with controls. In the pot assay, the lesion length on rapeseed stems was reduced by 34.9–38.3% when using the Si fertilizer as basal fertilizer. In the field assay, both the disease incidence and disease index of sclerotinia stem rot were significantly reduced with the usage of a solid Si fertilizer, Si foliar fertilizer, and the application of both, without negative affection on the main agronomic traits and seed quality of rapeseed. The transcriptome sequencing, quantitative reverse transcription PCR (qRT-PCR), and biochemical assays between K 2 SO 4 - and K 2 SiO 3 - treated rapeseed leaves revealed that Si promoted the biosynthesis of defense-related substances and enhanced the antioxidation and detoxification abilities of rapeseed after infection. Thus, this study concluded that Si can alleviate the disease severity of S. sclerotiorum in rapeseeds, partially due to the induced defense responses.
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Claims 7
Claim · model-written summary
Potassium silicate absorption reduced infected leaf lesion size by 86%.
- Taxon
- rapeseede0
- Organ / stage
- infected leavese0
- Treatment
- 10 mM of K 2 SiO 3e0
- Interactor
- Sclerotinia sclerotiorum
Sclerotinia sclerotiorume1pathogen - Outcome
- lesion sizee0
- Direction
- decreasee0
- Value
- 86%e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rapeseed that absorbed 10 mM of K 2 SiO 3 exhibited an 86% decrease in lesion size on infected leaves as compared with controls”
e1“Sclerotinia stem rot, caused by Sclerotinia sclerotiorum , is a devastating disease in rapeseed.”
t0“Rapeseed”
Claim · model-written summary
Foliar silicon spray reduced stem lesion length by 30.5–32.9%.
Verbatim
e0“the lesion length on rapeseed stems was reduced by 30.5–32.9% with the use of 100 mM of a foliar Si fertilizer as compared with controls”
Claim · model-written summary
Basal silicon fertilizer reduced stem lesion length by 34.9–38.3% in pots.
- Taxon
- rapeseede0
- Organ / stage
- stemse0
- Treatment
- Si fertilizer as basal fertilizere0
- Outcome
- lesion lengthe0
- Direction
- reducede0
- Value
- 34.9–38.3%e0
Not reportedComparator
Verbatim
e0“the lesion length on rapeseed stems was reduced by 34.9–38.3% when using the Si fertilizer as basal fertilizer”
Claim · model-written summary
Solid, foliar and combined silicon fertilizer reduced field disease incidence and index.
- Taxon
- rapeseedt0
- Treatment
- a solid Si fertilizer, Si foliar fertilizer, and the application of bothe0
- Outcome
- disease incidence and disease index of sclerotinia stem rote0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“both the disease incidence and disease index of sclerotinia stem rot were significantly reduced with the usage of a solid Si fertilizer, Si foliar fertilizer, and the application of both”
t0“Rapeseed”
Claim · model-written summary
Field silicon fertilizer did not adversely affect main agronomic traits or seed quality.
- Taxon
- rapeseede0
- Treatment
- a solid Si fertilizer, Si foliar fertilizer, and the application of bothe1
- Outcome
- main agronomic traits and seed qualitye0
- Direction
- without negative affectione0
Not reportedComparator
Verbatim
e0“without negative affection on the main agronomic traits and seed quality of rapeseed”
e1“both the disease incidence and disease index of sclerotinia stem rot were significantly reduced with the usage of a solid Si fertilizer, Si foliar fertilizer, and the application of both”
Claim · model-written summary
Silicon promoted synthesis of defense substances after infection.
Verbatim
e0“Si promoted the biosynthesis of defense-related substances and enhanced the antioxidation and detoxification abilities of rapeseed after infection”
Claim · model-written summary
Silicon enhanced antioxidant and detoxification capacity after infection.
Verbatim
e0“Si promoted the biosynthesis of defense-related substances and enhanced the antioxidation and detoxification abilities of rapeseed after infection”
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