Abstract
The twospotted spider mite (Tetranychus urticae Koch) is capable of dramatically reducing the yield of cotton crops and is often difficult and expensive to control. This study investigated and compared two important plant hormones, jasmonic acid (JA) and salicylic acid (SA), as constitutive and/or induced defence response components in a mite susceptible commercial cotton cultivar, Sicot 71 (Gossypium hirsutum L.) and a resistant diploid cotton BM13H (Gossypium arboreum L.). Foliar application of JA and methyl jasmonate (MeJA) reduced the mite population and leaf damage but application of other potential elicitors, SA and methyl salicylate (MeSA) did not. The concentrations of JA and SA in leaf tissues of induced and non-induced Sicot 71 and BM13H were quantified by liquid chromatography coupled to electrospray ionisation tandem mass spectrometry (LC-ESI-MS/MS). The JA content was constitutively higher in BM13H than Sicot 71 and also highly induced by mite infestation in BM13H but not in Sicot 71. However, SA was not significantly induced in either BM13H or Sicot 71. The expression levels of JA related genes, LOX, AOS and OPR were measured by quantitative PCR and elevated expression levels of JA related genes were detected in mite-infested BM13H. Therefore, JA and MeJA were implicated as key biochemical components in both the constitutive and induced defence responses of BM13H to spider mites.
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Claims 11
Claim · model-written summary
Foliar jasmonic acid reduced mite population and leaf damage.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- jasmonic acide1
- Interactor
- Tetranychus urticae Koch
.jpg?width=60)
Tetranychus urticaee2pest - Outcome
- mite population and leaf damagee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Foliar application of JA and methyl jasmonate (MeJA) reduced the mite population and leaf damage”
e1“jasmonic acid (JA)”
e2“twospotted spider mite (Tetranychus urticae Koch)”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
Foliar methyl jasmonate reduced mite population and leaf damage.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- methyl jasmonate (MeJA)e0
- Interactor
- Tetranychus urticae KochTetranychus urticaee1pest
- Outcome
- mite population and leaf damagee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of JA and methyl jasmonate (MeJA) reduced the mite population and leaf damage”
e1“twospotted spider mite (Tetranychus urticae Koch)”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
Salicylic acid did not reduce mite population or leaf damage.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- salicylic acide1
- Interactor
- Tetranychus urticae KochTetranychus urticaee3pest
- Outcome
- mite population and leaf damagee2
- Direction
- did note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of other potential elicitors, SA and methyl salicylate (MeSA) did not”
e1“salicylic acid (SA)”
e2“the mite population and leaf damage”
e3“twospotted spider mite (Tetranychus urticae Koch)”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
Methyl salicylate did not reduce mite population or leaf damage.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- methyl salicylate (MeSA)e0
- Interactor
- Tetranychus urticae KochTetranychus urticaee2pest
- Outcome
- mite population and leaf damagee1
- Direction
- did note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“methyl salicylate (MeSA) did not”
e1“the mite population and leaf damage”
e2“twospotted spider mite (Tetranychus urticae Koch)”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
Constitutive leaf JA content was higher in BM13H than Sicot 71.
- Taxon
- cottonGossypium hirsutumt0
- Material
- BM13He0
- Compound
- jasmonic acide1
- Outcome
- JA contente0
- Direction
- highere0
- Comparator
- Sicot 71e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The JA content was constitutively higher in BM13H than Sicot 71”
e1“jasmonic acid (JA)”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
Mite infestation highly induced JA content in BM13H.
- Taxon
- cottonGossypium hirsutumt0
- Material
- BM13He0
- Treatment
- mite infestatione0
- Interactor
- Tetranychus urticae KochTetranychus urticaee2pest
- Outcome
- JA contente1
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highly induced by mite infestation in BM13H”
e1“The JA content”
e2“twospotted spider mite (Tetranychus urticae Koch)”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
Mite infestation did not induce JA content in Sicot 71.
- Taxon
- cottonGossypium hirsutumt0
- Material
- Sicot 71e0
- Treatment
- mite infestatione2
- Interactor
- Tetranychus urticae KochTetranychus urticaee3pest
- Outcome
- JA contente1
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not in Sicot 71”
e1“The JA content”
e2“mite infestation”
e3“twospotted spider mite (Tetranychus urticae Koch)”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
SA was not significantly induced in BM13H.
- Taxon
- cottonGossypium hirsutumt0
- Material
- BM13He0
- Treatment
- mite infestatione1
- Outcome
- SAe0
- Direction
- not significantly inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA was not significantly induced in either BM13H or Sicot 71”
e1“mite infestation”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
SA was not significantly induced in Sicot 71.
- Taxon
- cottonGossypium hirsutumt0
- Material
- Sicot 71e0
- Treatment
- mite infestatione1
- Outcome
- SAe0
- Direction
- not significantly inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA was not significantly induced in either BM13H or Sicot 71”
e1“mite infestation”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
Mite-infested BM13H had elevated expression of JA-related genes LOX, AOS and OPR.
- Taxon
- cottonGossypium hirsutumt0
- Material
- BM13He0
- Interactor
- Tetranychus urticae KochTetranychus urticaee2pest
- Gene
- LOX, AOS and OPRe1
- Outcome
- expression levels of JA related genese0
- Direction
- elevatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated expression levels of JA related genes were detected in mite-infested BM13H”
e1“LOX, AOS and OPR”
e2“twospotted spider mite (Tetranychus urticae Koch)”
t0“cotton (Gossypium arboreum)”
Claim · model-written summary
JA and MeJA were implicated in constitutive and induced BM13H defence against mites.
- Taxon
- cottonGossypium hirsutumt0
- Material
- BM13He0
- Interactor
- spider mitesTetranychidaee0pest
- Compound
- JA and MeJAe0
- Outcome
- defence responses of BM13H to spider mitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“JA and MeJA were implicated as key biochemical components in both the constitutive and induced defence responses of BM13H to spider mites”
t0“cotton (Gossypium arboreum)”
The same questions in other papers
infection · molecular: metabolites · Gossypium hirsutum (cotton)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
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.