Abstract
BACKGROUND: Wheat straw is a rich resource worldwide. Straw return is an effective strategy to alleviate soil-borne diseases on monoculture watermelon. Previous studies focus on soil structure, physical and chemical properties; however, little is known about the molecular responses on host plant. RESULTS: No significant difference on the population of Fusarium oxysporum f.sp. niveum race 1(Fon1) in rhizosphere soil was found between control (no addition of wheat straw) and the treated groups (addition of 1% (T1) or 2% (T2) wheat straw). RNA-Seq analysis showed that 3419 differentially expressed genes were clustered into 8 profiles. KEGG analysis revealed that phenylpropanoid biosynthesis and plant hormone signal transduction were involved in wheat straw induced response in monoculture watermelon. Genes in lignin biosynthesis were found to be upregulated, and the lignin and auxin contents were higher in T1 and T2 compared to the control. Lignin was also enriched and the Fon1 population decreased in watermelon roots treated with wheat straw. The enzyme activities of phenylalanine ammonia-lyase and peroxidase were increased. CONCLUSIONS: Our data suggest that the addition of wheat straw enhances the defense response to Fon1 infection in watermelon through increasing lignin and auxin biosynthesis.
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Claims 9
Claim · model-written summary
Wheat straw did not significantly alter Fon1 population in rhizosphere soil.
- Taxon
- Fusarium oxysporum f.sp. niveum race 1
Fusarium oxysporum f. sp. niveume0 - Treatment
- addition of 1% (T1) or 2% (T2) wheat strawe0
- Outcome
- population of Fusarium oxysporum f.sp. niveum race 1(Fon1) in rhizosphere soile0
- Direction
- No significant differencee0
- Comparator
- control (no addition of wheat straw)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“No significant difference on the population of Fusarium oxysporum f.sp. niveum race 1(Fon1) in rhizosphere soil was found between control (no addition of wheat straw) and the treated groups (addition of 1% (T1) or 2% (T2) wheat straw)”
t0“watermelon”
Claim · model-written summary
RNA-Seq found 3419 differentially expressed genes in eight profiles.
- Taxon
- watermelon
Citrullus lanatust0 - Outcome
- differentially expressed genese0
- Value
- 3419e0
- Qualifier
- 8 profilese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“3419 differentially expressed genes were clustered into 8 profiles”
t0“watermelon”
Claim · model-written summary
Phenylpropanoid biosynthesis and hormone signaling were involved in the straw response.
- Taxon
- watermelon
Citrullus lanatuse0 - Treatment
- wheat strawe0
- Outcome
- phenylpropanoid biosynthesis and plant hormone signal transductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“phenylpropanoid biosynthesis and plant hormone signal transduction were involved in wheat straw induced response in monoculture watermelon”
Claim · model-written summary
Lignin biosynthesis genes were upregulated after straw treatment.
- Taxon
- watermelon
Citrullus lanatuse1 - Treatment
- wheat strawe1
- Outcome
- Genes in lignin biosynthesise0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Genes in lignin biosynthesis were found to be upregulated”
e1“wheat straw induced response in monoculture watermelon”
Claim · model-written summary
Lignin content was higher with 1% and 2% straw than control.
- Taxon
- watermelon
Citrullus lanatust0 - Treatment
- addition of 1% (T1) or 2% (T2) wheat strawe1
- Outcome
- lignine0
- Direction
- highere0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“the lignin and auxin contents were higher in T1 and T2 compared to the control”
e1“addition of 1% (T1) or 2% (T2) wheat straw”
t0“watermelon”
Claim · model-written summary
Auxin content was higher with 1% and 2% straw than control.
- Taxon
- watermelon
Citrullus lanatust0 - Treatment
- addition of 1% (T1) or 2% (T2) wheat strawe1
- Outcome
- auxin contentse0
- Direction
- highere0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“the lignin and auxin contents were higher in T1 and T2 compared to the control”
e1“addition of 1% (T1) or 2% (T2) wheat straw”
t0“watermelon”
Claim · model-written summary
Wheat straw enriched lignin in watermelon roots.
- Taxon
- watermelon
Citrullus lanatuse0 - Organ / stage
- watermelon rootse0
- Treatment
- wheat strawe0
- Outcome
- Lignine0
- Direction
- enrichede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Lignin was also enriched and the Fon1 population decreased in watermelon roots treated with wheat straw”
Claim · model-written summary
Wheat straw decreased Fon1 population in watermelon roots.
- Taxon
- Fon1e0
- Treatment
- wheat strawe0
- Interactor
- watermelon
Citrullus lanatuse0host - Outcome
- Fon1 populatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“the Fon1 population decreased in watermelon roots treated with wheat straw”
e1“Fusarium oxysporum f.sp. niveum race 1(Fon1)”
Claim · model-written summary
Phenylalanine ammonia-lyase and peroxidase activities increased.
- Taxon
- watermelon
Citrullus lanatuse1 - Treatment
- wheat strawe1
- Outcome
- enzyme activities of phenylalanine ammonia-lyase and peroxidasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The enzyme activities of phenylalanine ammonia-lyase and peroxidase were increased”
e1“wheat straw induced response in monoculture watermelon”
The same questions in other papers
Triticum aestivum · molecular: metabolites · Citrullus lanatus (watermelon)Results agree
1 paper in the same direction as this paper
- positive
Triticum aestivum · molecular: expression · Citrullus lanatus (watermelon)Results agree
2 papers in the same direction as this paper
- positive
- positive
Triticum aestivum · soil: biology · Citrullus lanatus (watermelon)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.