Abstract
Chinese cabbage is rich in glucosinolates (GLS) and their breakdown products, mainly isothiocyanates (ITC), which are assumed to be human health-promoting compounds. Sulphur and nitrogen have been shown to influence concentrations and patterns of both. Little is known as to whether the effect of varying sulphur and nitrogen nutrition on glucosinolate and isothiocyanate content is influenced by the genotype. Therefore, two cultivars of Brassica rapa L. ssp. pekinensis were grown with increasing S (0.0, 0.3, and 0.6 g pot-1) and N (1 and 2 g pot-1) supply. Results show that total GLS concentration increased with higher N and S application, but ratios between individual GLS compounds remained unchanged. High N supply reduced the concentration of GLS, especially of the aliphatic ones, while the indole and aromatic GLS exhibited statistically insignificant responses to increasing N and S application. The profile of breakdown products was dominated by epithionitriles, followed by ITCs and nitriles. The ITCs were substantially reduced in response to increasing N and decreasing S supply. This was not observed for nitriles. Overall, GLS pattern were primarily influenced by the genetic background of the cultivar and less influenced by differential nutrition. Results show that selection of the cultivar is of utmost importance when glucosinolates and their breakdown products shall be increased by fertilization. The online version of this article (doi: 10.5073/JABFQ.2016.089.036) contains supplementary files.
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Claims 10
Claim · model-written summary
Total GLS concentration increased with higher N and S application.
- Taxon
- Chinese cabbage
Brassica rapa subsp. pekinensist0 - Treatment
- higher N and S applicatione0
- Outcome
- total GLS concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total GLS concentration increased with higher N and S application”
t0“Chinese cabbage”
Claim · model-written summary
Ratios between individual GLS compounds remained unchanged under higher N and S application.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- higher N and S applicatione0
- Outcome
- ratios between individual GLS compoundse0
- Direction
- remained unchangede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total GLS concentration increased with higher N and S application, but ratios between individual GLS compounds remained unchanged”
t0“Chinese cabbage”
Claim · model-written summary
High N supply reduced GLS concentration, especially aliphatic GLS.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- High N supplye0
- Outcome
- concentration of GLS, especially of the aliphatic onese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High N supply reduced the concentration of GLS, especially of the aliphatic ones”
t0“Chinese cabbage”
Claim · model-written summary
Indole and aromatic GLS responded nonsignificantly to increasing N and S.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- increasing N and S applicatione0
- Outcome
- indole and aromatic GLSe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the indole and aromatic GLS exhibited statistically insignificant responses to increasing N and S application”
t0“Chinese cabbage”
Claim · model-written summary
Epithionitriles dominated the breakdown products, followed by ITCs and nitriles.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Outcome
- profile of breakdown productse0
- Qualifier
- dominated by epithionitriles, followed by ITCs and nitrilese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The profile of breakdown products was dominated by epithionitriles, followed by ITCs and nitriles”
t0“Chinese cabbage”
Claim · model-written summary
Increasing N supply substantially reduced ITCs.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- increasing Ne0
- Outcome
- ITCse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ITCs were substantially reduced in response to increasing N and decreasing S supply”
t0“Chinese cabbage”
Claim · model-written summary
Decreasing S supply substantially reduced ITCs.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- decreasing S supplye0
- Outcome
- ITCse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ITCs were substantially reduced in response to increasing N and decreasing S supply”
t0“Chinese cabbage”
Claim · model-written summary
Nitriles did not show the ITC response to N and S supply.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Treatment
- increasing N and decreasing S supplye1
- Outcome
- nitrilese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was not observed for nitriles”
e1“The ITCs were substantially reduced in response to increasing N and decreasing S supply”
t0“Chinese cabbage”
Claim · model-written summary
Cultivar genetic background influenced GLS patterns more than differential nutrition.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Material
- cultivare0
- Outcome
- GLS patterne0
- Comparator
- differential nutritione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GLS pattern were primarily influenced by the genetic background of the cultivar and less influenced by differential nutrition”
t0“Chinese cabbage”
Claim · model-written summary
The authors recommend cultivar selection when fertilization is intended to increase glucosinolates and breakdown products.
- Taxon
- Chinese cabbageBrassica rapa subsp. pekinensist0
- Outcome
- selection of the cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“selection of the cultivar is of utmost importance when glucosinolates and their breakdown products shall be increased by fertilization”
t0“Chinese cabbage”
The same questions in other papers
sulfur atom · quality: phytochemicals · Brassica rapa (field mustard)Positive and negative results
2 in the opposite direction
- positive
- positive
sulfur atom · molecular: metabolites · Brassica rapa (field mustard)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- no effect
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.