Abstract
SUMMARY The glucosinolates are thought to contribute to resistance to pests and diseases in members of the Cruciferae, including oilseed rape (Brassica napus) and they are known to accumulate in Brassica tissues after infestation by various pests. The present study investigated the changes in glucosinolate concentration in leaves of oilseed rape following inoculation with the dark leaf spot pathogen (Alternaria brassicae). Fourth and sixth leaves of the single‐low cultivar Bienvenu (low in erucic acid) and the double‐low cultivar Cobra (low in erucic acid and glucosinolate) were removed at intervals up to twenty days after inoculation and analysed for glucosinolate content using HPLC. Glucosinolates accumulated in inoculated leaves of both cultivars but the accumulation was greater for cv. Bienvenu, especially in sixth leaves. Among the glucosinolates, aliphatic compounds accumulated rapidly in cv. Bienvenu, but later declined. Indolyl and aromatic glucosinolates accumulated in both cultivars, but at a slower rate than the aliphatic glucosinolates. There were differences in the extent to which individual glucosinolates accumulated after inoculation. Disease symptoms were initially more extensive on cv. Cobra than on cv. Bienvenu but were similar on corresponding leaves of the two cultivars by the end of the experiment. However, sixth leaves had significantly less lesioning than fourth leaves. Glucosinolate accumulation in infected oilseed rape may restrict the spread of existing fungal infection or inhibit subsequent attempted infections, especially in younger leaves.
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Claims 9
Claim · model-written summary
Glucosinolates accumulated in inoculated leaves of both cultivars.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Treatment
- inoculation with the dark leaf spot pathogen (Alternaria brassicae)e0
- Interactor
- Alternaria brassicae
_Sacc._Symptoms_on_cabbage.JPG?width=60)
Alternaria brassicaee0pathogen - Outcome
- Glucosinolatese0
- Direction
- accumulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
_Sacc._Symptoms_on_cabbage.JPG?width=500)
Verbatim
e0“leaves of oilseed rape following inoculation with the dark leaf spot pathogen (Alternaria brassicae). Fourth and sixth leaves of the single‐low cultivar Bienvenu (low in erucic acid) and the double‐low cultivar Cobra (low in erucic acid and glucosinolate) were removed at intervals up to twenty days after inoculation and analysed for glucosinolate content using HPLC. Glucosinolates accumulated in inoculated leaves of both cultivars”
Claim · model-written summary
Glucosinolate accumulation was greater in Bienvenu, especially sixth leaves.
- Taxon
- oilseed rapeBrassica napust0
- Material
- cv. Bienvenue0
- Organ / stage
- sixth leavese0
- Outcome
- accumulatione0
- Direction
- greatere0
- Comparator
- both cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glucosinolates accumulated in inoculated leaves of both cultivars but the accumulation was greater for cv. Bienvenu, especially in sixth leaves”
t0“oilseed rape (Brassica napus L.)”
Claim · model-written summary
Aliphatic glucosinolates accumulated rapidly in Bienvenu before declining.
- Taxon
- oilseed rapeBrassica napust0
- Material
- cv. Bienvenue0
- Outcome
- aliphatic compoundse0
- Direction
- accumulated rapidlye0
- Qualifier
- later declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aliphatic compounds accumulated rapidly in cv. Bienvenu, but later declined”
t0“oilseed rape (Brassica napus L.)”
Claim · model-written summary
Indolyl and aromatic glucosinolates accumulated in both cultivars more slowly than aliphatic glucosinolates.
- Taxon
- oilseed rapeBrassica napust0
- Outcome
- Indolyl and aromatic glucosinolatese0
- Direction
- slowere0
- Comparator
- aliphatic glucosinolatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Indolyl and aromatic glucosinolates accumulated in both cultivars, but at a slower rate than the aliphatic glucosinolates”
t0“oilseed rape (Brassica napus L.)”
Claim · model-written summary
Individual glucosinolates differed in accumulation after inoculation.
- Taxon
- oilseed rapeBrassica napust0
- Outcome
- individual glucosinolates accumulatede0
- Direction
- differencese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were differences in the extent to which individual glucosinolates accumulated after inoculation”
t0“oilseed rape (Brassica napus L.)”
Claim · model-written summary
Disease symptoms were initially more extensive on Cobra than Bienvenu.
- Taxon
- oilseed rapeBrassica napust0
- Material
- cv. Cobrae0
- Outcome
- Disease symptomse0
- Direction
- more extensivee0
- Comparator
- cv. Bienvenue0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease symptoms were initially more extensive on cv. Cobra than on cv. Bienvenu”
t0“oilseed rape (Brassica napus L.)”
Claim · model-written summary
Symptoms on corresponding leaves of the cultivars were similar by experiment end.
- Taxon
- oilseed rapeBrassica napust0
- Outcome
- corresponding leavese0
- Direction
- similare0
- Qualifier
- by the end of the experimente0
- Comparator
- two cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were similar on corresponding leaves of the two cultivars by the end of the experiment”
t0“oilseed rape (Brassica napus L.)”
Claim · model-written summary
Sixth leaves had less lesioning than fourth leaves.
- Taxon
- oilseed rapeBrassica napust0
- Organ / stage
- sixth leavese0
- Outcome
- lesioninge0
- Direction
- lesse0
- Comparator
- fourth leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sixth leaves had significantly less lesioning than fourth leaves”
t0“oilseed rape (Brassica napus L.)”
Claim · model-written summary
Authors suggest glucosinolate accumulation may restrict infection spread or later infections in younger leaves.
- Taxon
- oilseed rapeBrassica napuse0
- Organ / stage
- younger leavese0
- Outcome
- spread of existing fungal infection or inhibit subsequent attempted infectionse0
- Qualifier
- Glucosinolate accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glucosinolate accumulation in infected oilseed rape may restrict the spread of existing fungal infection or inhibit subsequent attempted infections, especially in younger leaves”
The same questions in other papers
light · quality: phytochemicals · Brassica napus (oilseed rape)Positive and negative results
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- no effect
- positive
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See all 7 papers →inoculation · quality: phytochemicals · Brassica napus (oilseed rape)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
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See all 7 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.