Abstract
Tobacco ( Nicotiana tabacum L.) is well-known as an economic crop whose quality is evaluated according to its aroma quality. Researchers have found that selenium application can increase the aroma quality of tobacco, but until now, its mechanism is still unclear. So a field experiment was conducted to investigate the regulatory effect of the trace element selenium on enhancing aroma substances in flue-cured tobacco leaves. We compared selenium content, aroma precursors, non-volatile organic acids (NVOAs) content, and neutral aroma substances in tobacco upper leaves that applying three selenium fertilizer types (sodium selenite, organic selenium and nano-selenium) with three levels of pure selenium application rates (5.24 g·hm -2 , 10.48 g·hm -2 , and 15.72 g·hm -2 ) through foliar spraying. The results showed that the neutral aroma substances and NVOAs content were significantly increased. Metabolomics analysis of NVOAs showed that biosynthesis of phenylpropanoids pathway was significantly enriched. This indicates that selenium application may be able to regulate the accumulation of phenylpropane degradation products by regulating these NVOAs involved in the biosynthesis of phenylpropanoids pathway. Selenium content was significantly positively correlated with phenylpropane degradation products, NVOAs content, and phenolic compounds, while pyruvate was significantly down-regulated in each selenium application treatment. Therefore, it was speculated that selenium application could enhance the conversion of pyruvate into the biosynthesis of phenylpropanoids pathway. In summary, spraying organic selenium at 5.24–15.72 g·hm -2 or nano-selenium at 5.24–10.48 g·hm -2 could provide a suitable strategy for improving tobacco aroma quality.
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Claims 8
Claim · model-written summary
Selenium application significantly increased neutral aroma substances and NVOA content.
- Taxon
- Tobacco
Nicotiana tabacumt0 - Treatment
- selenium applicatione1
- Outcome
- neutral aroma substances and NVOAs contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the neutral aroma substances and NVOAs content were significantly increased.”
t0“tobacco”
e1“selenium application can increase the aroma quality of tobacco”
Claim · model-written summary
Phenylpropanoid biosynthesis pathway was significantly enriched in NVOA metabolomics.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- biosynthesis of phenylpropanoids pathwaye0
- Direction
- enrichede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Metabolomics analysis of NVOAs showed that biosynthesis of phenylpropanoids pathway was significantly enriched.”
t0“tobacco”
Claim · model-written summary
Selenium content correlated positively with phenylpropane degradation products.
- Taxon
- tobaccoNicotiana tabacumt0
- Compound
- Seleniume0
- Outcome
- phenylpropane degradation productse0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selenium content was significantly positively correlated with phenylpropane degradation products, NVOAs content, and phenolic compounds”
t0“tobacco”
Claim · model-written summary
Selenium content correlated positively with NVOA content.
- Taxon
- tobaccoNicotiana tabacumt0
- Compound
- Seleniume0
- Outcome
- NVOAs contente0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selenium content was significantly positively correlated with phenylpropane degradation products, NVOAs content, and phenolic compounds”
t0“tobacco”
Claim · model-written summary
Selenium content correlated positively with phenolic compounds.
- Taxon
- tobaccoNicotiana tabacumt0
- Compound
- Seleniume0
- Outcome
- phenolic compoundse0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selenium content was significantly positively correlated with phenylpropane degradation products, NVOAs content, and phenolic compounds”
t0“tobacco”
Claim · model-written summary
Pyruvate was significantly down-regulated under each selenium treatment.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- selenium application treatmente0
- Outcome
- pyruvatee0
- Direction
- down-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pyruvate was significantly down-regulated in each selenium application treatment.”
t0“tobacco”
Claim · model-written summary
Authors recommend organic selenium at 5.24–15.72 g·hm -2 to improve tobacco aroma quality.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- spraying organic selenium at 5.24–15.72 g·hm -2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying organic selenium at 5.24–15.72 g·hm -2 or nano-selenium at 5.24–10.48 g·hm -2 could provide a suitable strategy for improving tobacco aroma quality.”
Claim · model-written summary
Authors recommend nano-selenium at 5.24–10.48 g·hm -2 to improve tobacco aroma quality.
- Taxon
- tobaccoNicotiana tabacume0
- Outcome
- nano-selenium at 5.24–10.48 g·hm -2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying organic selenium at 5.24–15.72 g·hm -2 or nano-selenium at 5.24–10.48 g·hm -2 could provide a suitable strategy for improving tobacco aroma quality.”
The same questions in other papers
selenium atom · quality: phytochemicals · Nicotiana tabacum (tobacco)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.