Abstract
, severely impacts tobacco production. Selenium (Se) is a beneficial trace element known to enhance plant stress resistance. While previous studies indicated Se's efficacy against black shank, its differential effects on tobacco varieties with contrasting innate resistance remain unexplored. Herein, we integrated physiological, transcriptomic, and metabolomic analyses to elucidate the mechanisms of Se-induced resistance in a resistant (K326) and a susceptible (Zhongyan 100) tobacco cultivar. Our results showed that foliar application of 8 mg/L Se significantly reduced disease incidence and enhanced antioxidant enzyme activities, membrane stability, and accumulation of protective compounds in both cultivars. Multi-omics analyses revealed that Se potently enhanced resistance in K326 by synergistically upregulating the phenylpropanoid biosynthesis pathway, promoting the synthesis of lignin precursors and phenolic acids, and maintaining purine metabolism to ensure energy supply. In contrast, the susceptible cultivar Zhongyan 100 showed limited metabolic capacity to translate Se-induced transcriptional changes into effective defence metabolite accumulation. These findings provide novel insights into the genotype-dependent mechanisms of Se-induced resistance and highlight the potential of precision Se application as a strategy to bolster defence in resistant cultivars against soil-borne diseases.
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Claims 9
Claim · model-written summary
Foliar selenium significantly reduced disease incidence in both cultivars.
- Taxon
- Nicotiana tabacum L.
Nicotiana tabacumt0 - Treatment
- foliar application of 8 mg/L See0
- Interactor
- Phytophthora nicotianae
Phytophthora nicotianaet1pathogen - Outcome
- disease incidencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nicotiana tabacum L.”
t1“Phytophthora nicotianae”
e0“foliar application of 8 mg/L Se significantly reduced disease incidence and enhanced antioxidant enzyme activities, membrane stability, and accumulation of protective compounds in both cultivars.”
Claim · model-written summary
Foliar selenium enhanced antioxidant enzyme activities in both cultivars.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- foliar application of 8 mg/L See0
- Outcome
- antioxidant enzyme activitiese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nicotiana tabacum L.”
e0“foliar application of 8 mg/L Se significantly reduced disease incidence and enhanced antioxidant enzyme activities, membrane stability, and accumulation of protective compounds in both cultivars.”
Claim · model-written summary
Foliar selenium enhanced membrane stability in both cultivars.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- foliar application of 8 mg/L See0
- Outcome
- membrane stabilitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nicotiana tabacum L.”
e0“foliar application of 8 mg/L Se significantly reduced disease incidence and enhanced antioxidant enzyme activities, membrane stability, and accumulation of protective compounds in both cultivars.”
Claim · model-written summary
Foliar selenium enhanced protective compound accumulation in both cultivars.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Treatment
- foliar application of 8 mg/L See0
- Outcome
- accumulation of protective compoundse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nicotiana tabacum L.”
e0“foliar application of 8 mg/L Se significantly reduced disease incidence and enhanced antioxidant enzyme activities, membrane stability, and accumulation of protective compounds in both cultivars.”
Claim · model-written summary
In K326 selenium upregulated phenylpropanoid biosynthesis.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Material
- K326e0
- Treatment
- See0
- Outcome
- phenylpropanoid biosynthesis pathwaye0
- Direction
- upregulatinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se potently enhanced resistance in K326 by synergistically upregulating the phenylpropanoid biosynthesis pathway”
t0“Nicotiana tabacum L.”
Claim · model-written summary
In K326 selenium promoted lignin precursor and phenolic acid synthesis.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Material
- K326e1
- Treatment
- See1
- Outcome
- synthesis of lignin precursors and phenolic acidse0
- Direction
- promotinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoting the synthesis of lignin precursors and phenolic acids”
e1“Se potently enhanced resistance in K326”
t0“Nicotiana tabacum L.”
Claim · model-written summary
In K326 selenium maintained purine metabolism to ensure energy supply.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Material
- K326e1
- Treatment
- See1
- Outcome
- purine metabolisme0
- Direction
- maintaininge0
- Qualifier
- energy supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintaining purine metabolism to ensure energy supply”
e1“Se potently enhanced resistance in K326”
t0“Nicotiana tabacum L.”
Claim · model-written summary
Zhongyan 100 had limited capacity to convert selenium induced transcriptional changes to defense metabolites.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Material
- Zhongyan 100e0
- Treatment
- Se-induced transcriptional changese0
- Outcome
- effective defence metabolite accumulatione0
- Direction
- limitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the susceptible cultivar Zhongyan 100 showed limited metabolic capacity to translate Se-induced transcriptional changes into effective defence metabolite accumulation.”
t0“Nicotiana tabacum L.”
Claim · model-written summary
Authors highlight precision selenium application to bolster defense in resistant cultivars.
- Taxon
- Nicotiana tabacum L.Nicotiana tabacumt0
- Outcome
- precision Se applicatione0
- Qualifier
- resistant cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highlight the potential of precision Se application as a strategy to bolster defence in resistant cultivars against soil-borne diseases.”
t0“Nicotiana tabacum L.”
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See all 20 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.