Abstract
Rose processing into essentials oil is one of the major sectors providing inputs for cosmetics and health/food supplements industry, generating significant amount of wastewater if applying the steam distillation approach. Rose distillation wastewater (RDW), the major by-product of rose processing, still contains a significant load of polyphenolic compounds. This organic burden poses a significant environmental threat for RDW disposal, while, on the other hand, it still contains valuable compounds that could be valorized in the circular economy framework. This study has investigated the possibility of utilizing RDW in various concentrations (10%, 25%, 100% v/v) as a circular tomato growth biostimulant, addressing the existing research gap in the field of circular RDW valorization and its effects on plant growth modulation. LC-MS/MS and antioxidant assays have confirmed a rich antioxidant profile of RDW samples, with gallic acid, quinic acid, quercetin, kaempferol and their glycosides as the most abundant compounds. Tomato germination assays have resulted in significantly improved germination and initial seedling growth parameters when 10% RDW samples PA (‘Pure Aroma’), MA (‘Magic Aroma’) and NA (‘Natural Aroma) had been applied as seed treatment (10 seeds per treatment with each RDW), indicating varying plant growth-promoting potential depending on the RDW chemical composition. The increase in tomato growth parameters compared to the control varied in range 34% (MA)—60% (PA) for root length, 70% (MA)—109% (PA) for shoot length and 43% (MA)—72% (PA) for total seedling length, as well as 43% (MA)—72% (PA) for SVI-I and 40% (NA)—49% (MA) for SVI-II (seedling vigor indices I and II, respectively). Contrarily, the increase in RDW concentration of up to 25% and 100% (v/v) has resulted in inhibition of tomato germination and growth compared to the control (e.g., in range 10–50% (RDW 25%) and 45–87% (RDW 100%) for root length), suggesting the necessity for further optimization of RDW dosage in biostimulant applications. The results of this study open the field of possibilities for further development of circular plant biostimulants based on rose processing by-products, as value-added enrichment of the bio-based solutions portfolio for sustainable agriculture.
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Claims 9
Claim · model-written summary
RDW contained abundant antioxidant compounds.
- Outcome
- gallic acid, quinic acid, quercetin, kaempferol and their glycosidese0
Not reportedTaxon
Verbatim
e0“RDW samples, with gallic acid, quinic acid, quercetin, kaempferol and their glycosides as the most abundant compounds”
Claim · model-written summary
Ten percent RDW improved tomato germination and initial seedling growth.
- Taxon
- Tomato
Solanum lycopersicume0 - Treatment
- 10% RDW samplese0
- Outcome
- germination and initial seedling growth parameterse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato germination assays have resulted in significantly improved germination and initial seedling growth parameters when 10% RDW samples PA (‘Pure Aroma’), MA (‘Magic Aroma’) and NA (‘Natural Aroma) had been applied as seed treatment”
Claim · model-written summary
Root length rose 34% with MA to 60% with PA compared with control.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- MAe0
- Outcome
- root lengthe0
- Direction
- increasee0
- Value
- 34% (MA)—60% (PA)e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in tomato growth parameters compared to the control varied in range 34% (MA)—60% (PA) for root length”
Claim · model-written summary
Shoot length rose 70% with MA to 109% with PA.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- MAe0
- Outcome
- shoot lengthe0
- Direction
- increasee0
- Value
- 70% (MA)—109% (PA)e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in tomato growth parameters compared to the control varied in range 34% (MA)—60% (PA) for root length, 70% (MA)—109% (PA) for shoot length”
Claim · model-written summary
Total seedling length rose 43% with MA to 72% with PA.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- MAe0
- Outcome
- total seedling lengthe0
- Direction
- increasee0
- Value
- 43% (MA)—72% (PA)e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in tomato growth parameters compared to the control varied in range 34% (MA)—60% (PA) for root length, 70% (MA)—109% (PA) for shoot length and 43% (MA)—72% (PA) for total seedling length”
Claim · model-written summary
SVI-I rose 43% with MA to 72% with PA.
Not reportedTaxonComparatorDirection
Verbatim
e0“as well as 43% (MA)—72% (PA) for SVI-I and 40% (NA)—49% (MA) for SVI-II”
Claim · model-written summary
SVI-II rose 40% with NA to 49% with MA.
Not reportedTaxonComparatorDirection
Verbatim
e0“as well as 43% (MA)—72% (PA) for SVI-I and 40% (NA)—49% (MA) for SVI-II”
Claim · model-written summary
RDW at 25% inhibited tomato root growth by 10–50% versus control.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- RDW 25%e0
- Outcome
- root lengthe0
- Direction
- inhibitione0
- Value
- 10–50%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RDW concentration of up to 25% and 100% (v/v) has resulted in inhibition of tomato germination and growth compared to the control (e.g., in range 10–50% (RDW 25%) and 45–87% (RDW 100%) for root length)”
Claim · model-written summary
RDW at 100% inhibited tomato root growth by 45–87% versus control.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- RDW 100%e0
- Outcome
- root lengthe0
- Direction
- inhibitione0
- Value
- 45–87%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RDW concentration of up to 25% and 100% (v/v) has resulted in inhibition of tomato germination and growth compared to the control (e.g., in range 10–50% (RDW 25%) and 45–87% (RDW 100%) for root length)”
The same questions in other papers
processing · growth · Solanum lycopersicum (tomato)Positive and negative results
44 papers in the same direction as this paper · 19 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- negative
62 papers more in this group
See all 66 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.