Abstract
Plant growth-promoting microorganisms (PGPMs) have shown great promise in enhancing plant development, improving stress tolerance, and modulating key physiological traits. However, their specific effects on cigar tobacco ( Nicotiana tabacum ) growth and leaf quality under controlled conditions remain poorly understood. In this study, we evaluated several PGPM inoculants, including Sinomonas atrocyanea , Bacillus velezensis , Bacillus cereus , Paenibacillus sp., Arthrobacter atrocyaneus , and other three Arthrobacter sp., for their effects on cigar tobacco growth and key quality traits under controlled conditions. Results showed that several treatments, particularly those containing Arthrobacter sp. and Bacillus velezensis , significantly increased total leaf number, leaf area, stem diameter, and plant height. These treatments also enhanced chlorophyll a and b accumulation, indicating improved photosynthetic capacity. Moreover, soluble sugar content and glandular trichome density, important indicators of flavor and aroma quality, were substantially elevated, Arthrobacter sp. showing the most pronounced sugar accumulation. These improvements are likely associated with microbial traits such as phytohormone production and nutrient solubilization. Our findings suggest that selected PGPMs can serve as effective biofertilizers for enhancing both biomass and quality-related characteristics of cigar tobacco, offering a viable pathway toward greener and higher-value tobacco production.
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Claims 6
Claim · model-written summary
Arthrobacter- and Bacillus velezensis-containing PGPM treatments significantly increased total leaf number, leaf area and stem diameter of cigar tobacco under controlled conditions.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume0 - Material
- cv. XJ-14t0
- Treatment
- those containing Arthrobacter sp. and Bacillus velezensise1
- Interactor
- Arthrobacter sp.
Arthrobactere1symbiont - Second interactor
- Bacillus velezensis
Bacillus velezensise1symbiont - Outcome
- total leaf number, leaf area, stem diametere1
- Direction
- increasede1
- Setting
- under controlled conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“enhance tobacco (Nicotiana tabacum cv. XJ-14) leaf productivity and quality”
e0“their specific effects on cigar tobacco ( Nicotiana tabacum ) growth and leaf quality under controlled conditions”
e1“those containing Arthrobacter sp. and Bacillus velezensis , significantly increased total leaf number, leaf area, stem diameter”
Claim · model-written summary
Arthrobacter- and Bacillus velezensis-containing PGPM treatments significantly increased plant height of cigar tobacco under controlled conditions.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Material
- cv. XJ-14t0
- Treatment
- those containing Arthrobacter sp. and Bacillus velezensise2
- Interactor
- Arthrobacter sp.Arthrobactere2symbiont
- Second interactor
- Bacillus velezensisBacillus velezensise2symbiont
- Outcome
- plant heighte2
- Direction
- increasede2
- Setting
- under controlled conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“enhance tobacco (Nicotiana tabacum cv. XJ-14) leaf productivity and quality”
e0“their specific effects on cigar tobacco ( Nicotiana tabacum ) growth and leaf quality under controlled conditions”
e2“those containing Arthrobacter sp. and Bacillus velezensis , significantly increased total leaf number, leaf area, stem diameter, and plant height”
Claim · model-written summary
PGPM treatments enhanced chlorophyll a and b accumulation in cigar tobacco under controlled conditions.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- These treatmentse3
- Outcome
- chlorophyll a and b accumulatione3
- Direction
- enhancede3
- Setting
- under controlled conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their specific effects on cigar tobacco ( Nicotiana tabacum ) growth and leaf quality under controlled conditions”
e3“These treatments also enhanced chlorophyll a and b accumulation”
Claim · model-written summary
Soluble sugar content and glandular trichome density of cigar tobacco were substantially elevated under controlled conditions.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Outcome
- soluble sugar content and glandular trichome densitye4
- Direction
- substantially elevatede4
- Setting
- under controlled conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their specific effects on cigar tobacco ( Nicotiana tabacum ) growth and leaf quality under controlled conditions”
e4“soluble sugar content and glandular trichome density, important indicators of flavor and aroma quality, were substantially elevated”
Claim · model-written summary
Arthrobacter sp. showed the most pronounced soluble sugar accumulation among the PGPM treatments in cigar tobacco.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Interactor
- Arthrobacter sp.Arthrobactere5symbiont
- Outcome
- sugar accumulatione5
- Direction
- most pronouncede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their specific effects on cigar tobacco ( Nicotiana tabacum ) growth and leaf quality under controlled conditions”
e5“Arthrobacter sp. showing the most pronounced sugar accumulation”
Claim · model-written summary
Selected PGPMs are suggested as effective biofertilizers for enhancing biomass and quality-related characteristics of cigar tobacco.
Verbatim
e6“selected PGPMs can serve as effective biofertilizers for enhancing both biomass and quality-related characteristics of cigar tobacco”
The same questions in other papers
Bacillus velezensis · growth · Nicotiana tabacum (tobacco)Results agree
2 papers in the same direction as this paper
- 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.