Abstract
Allelopathic effects of khat leaves residues (25 and 50 g) and alleviative effects of salicylic acid (0.5 mM) in wheat roots were carefully investigated in this study. Khat leaves residues stimulated hydrogen peroxide (H2O2), lipid peroxidation, ascorbate (ASA), glutathione (GHS) and non-proteinthiol (NPT) contents. Salicylic acid (SA) was found to inhibit the stimulatory role of khat leaves residues on the production of H2O2 and lipid peroxidation in roots of wheat plants. On the other hand, SA increased ASA, GSH and NPT contents. Catalase (CAT) and ascrobate peroxide (APX) activities were increased significantly in plants growing in soil amended with khat leaves residues, while the activity of peroxidase (POD) was slightly decreased. SA additively inhibited the stimulatory effect of khat leaves residues on CAT and APX activities. In addition, the applied SA increased POD activity. Residues of khat leaves in the soil showed an inhibitory effect on pectin and cellulose fractions of roots. However, hemicellulose content of roots was stimulated. Soaking wheat caryopses in SA counteracted partially or completely the adverse effect of khat leaves residues on pectin and cellulose composition. Furthermore, the data clearly demonstrated the capability of SA treatment in retarding the stimulatory role of khat leaves residues on the production of hemicellulose in roots of wheat plants.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Khat residues increased hydrogen peroxide and lipid peroxidation in wheat roots.
- Treatment
- Khat leaves residuese0
- Outcome
- hydrogen peroxide (H2O2), lipid peroxidatione0
- Direction
- stimulatede0
Not reportedTaxonComparator
Verbatim
e0“Khat leaves residues stimulated hydrogen peroxide (H2O2), lipid peroxidation, ascorbate (ASA), glutathione (GHS) and non-proteinthiol (NPT) contents”
Claim · model-written summary
Khat residues increased ascorbate, glutathione and non-proteinthiol contents.
- Treatment
- Khat leaves residuese0
- Outcome
- ascorbate (ASA), glutathione (GHS) and non-proteinthiol (NPT) contentse0
- Direction
- stimulatede0
Not reportedTaxonComparator
Verbatim
e0“Khat leaves residues stimulated hydrogen peroxide (H2O2), lipid peroxidation, ascorbate (ASA), glutathione (GHS) and non-proteinthiol (NPT) contents”
Claim · model-written summary
Salicylic acid inhibited the residue-induced hydrogen peroxide and lipid peroxidation response.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- rootse0
- Treatment
- Salicylic acid (SA)e0
- Outcome
- production of H2O2 and lipid peroxidatione0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salicylic acid (SA) was found to inhibit the stimulatory role of khat leaves residues on the production of H2O2 and lipid peroxidation in roots of wheat plants”
Claim · model-written summary
Salicylic acid increased ASA, GSH and NPT contents.
Not reportedTaxonComparator
Verbatim
e0“SA increased ASA, GSH and NPT contents”
Claim · model-written summary
Khat residues significantly increased CAT and APX activities.
- Treatment
- soil amended with khat leaves residuese0
- Outcome
- Catalase (CAT) and ascrobate peroxide (APX) activitiese0
- Direction
- increasede0
Not reportedTaxonComparator
Verbatim
e0“Catalase (CAT) and ascrobate peroxide (APX) activities were increased significantly in plants growing in soil amended with khat leaves residues”
Claim · model-written summary
Khat residues slightly decreased POD activity.
Not reportedTaxonTreatmentComparator
Verbatim
e0“while the activity of peroxidase (POD) was slightly decreased”
Claim · model-written summary
Salicylic acid inhibited the residue-induced increases in CAT and APX activities.
Not reportedTaxonComparator
Verbatim
e0“SA additively inhibited the stimulatory effect of khat leaves residues on CAT and APX activities”
Claim · model-written summary
Applied salicylic acid increased POD activity.
Not reportedTaxonComparator
Verbatim
e0“the applied SA increased POD activity”
Claim · model-written summary
Khat residues reduced root pectin and cellulose fractions.
- Treatment
- Residues of khat leaves in the soile0
- Outcome
- pectin and cellulose fractions of rootse0
- Direction
- inhibitorye0
Not reportedTaxonComparator
Verbatim
e0“Residues of khat leaves in the soil showed an inhibitory effect on pectin and cellulose fractions of roots”
Claim · model-written summary
Khat residues stimulated root hemicellulose content.
Not reportedTaxonTreatmentComparator
Verbatim
e0“hemicellulose content of roots was stimulated”
Claim · model-written summary
Salicylic acid soaking partly or completely counteracted residue effects on root pectin and cellulose.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Soaking wheat caryopses in SAe0
- Outcome
- pectin and cellulose compositione0
- Direction
- counteractede0
- Qualifier
- partially or completelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soaking wheat caryopses in SA counteracted partially or completely the adverse effect of khat leaves residues on pectin and cellulose composition”
Claim · model-written summary
Salicylic acid retarded the residue-induced rise in root hemicellulose.
- Taxon
- wheatTriticum aestivume0
- Treatment
- SA treatmente0
- Outcome
- production of hemicellulosee0
- Direction
- retardinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA treatment in retarding the stimulatory role of khat leaves residues on the production of hemicellulose in roots of wheat plants”
The same questions in other papers
salicylic acid · physiology: oxidative · Triticum aestivum (wheat)Results differ
55 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- negative
58 papers more in this group
See all 62 papers →salicylic acid · physiology: antioxidant enzymes · Triticum aestivum (wheat)Results differ
60 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
60 papers more in this group
See all 64 papers →salicylic acid · molecular: metabolites · Triticum aestivum (wheat)Positive and negative results
33 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
31 papers more in this group
See all 35 papers →salicylic acid · yield · Triticum aestivum (wheat)Positive and negative results
80 papers in the same direction as this paper · 4 in the opposite direction
- negative
- no effect
- negative
81 papers more in this group
See all 85 papers →Catha edulis · molecular: metabolites · Triticum aestivum (wheat)Results agree
1 paper in the same direction as this paper
- negative
salicylic acid · quality: general · Triticum aestivum (wheat)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →application · quality: general · Triticum aestivum (wheat)Positive and negative results
26 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- no effect
27 papers more in this group
See all 31 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.