Abstract
SummaryExperiments were carried out to investigate the influence of combined nitrogen (N) and sulphur (S) fertility on the organosulphur compound content of garlic bulbs, especially alliin, as a specific flavour quality trait related to the health-value of garlic. Three cultivars, ‘Printanor’, ‘Morasol’ and ‘Messidrôme’, were grown in the greenhouse and in vitro. Sulphur was increased in the macronutrients within the range 0 – 144 mg l–1. Numerous combinations of both S and N were tested in vitro. In the greenhouse, increasing N levels, from 184.8 mg l–1 to 856.8 mg l–1, were tested with a single high level of S (128 mg l–1). Increasing S alone did not affect the growth or bulb weight of any garlic cultivar, but slightly increased the alliin content of bulbs. No symptoms of S deficiency were observed under greenhouse conditions, although the same garlic cultivars grown in vitro at 0 mg S l–1 clearly suffered, their size being greatly reduced. This suggests an important role for S contamination, such as atmospheric S, in the process of S absorption by garlic plants, which is discussed. Increasing N levels significantly accelerated garlic maturity and decreased bulb yield. The effect of N on the organosulphur compound content of bulbs was cultivar-dependent, but alliin accumulation was not enhanced. ‘Printanor’ and ‘Morasol’ had the highest alliin levels and were negatively influenced by increasing N, while a slight synergistic effect of S and N was observed on ‘Messidrôme’. ‘Messidrôme’ also had the highest flavour potential when including precursors, and was more efficient in accumulating S into organosulphur compounds. It is therefore advisable to choose the most appropriate variety, and to adapt the N S fertilisation regime according to the environment, in order to produce garlic with the highest health-value.
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Claims 15
Claim · model-written summary
Increasing S alone did not affect growth or bulb weight of garlic.
- Taxon
- garlic
Allium sativumt0 - Treatment
- Increasing S alonee1
- Outcome
- growth or bulb weighte1
- Direction
- did not affecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e1“Increasing S alone did not affect the growth or bulb weight of any garlic cultivar, but slightly increased the alliin content of bulbs”
Claim · model-written summary
Increasing S alone slightly increased the alliin content of garlic bulbs.
- Taxon
- garlicAllium sativumt0
- Treatment
- Increasing S alonee1
- Outcome
- alliin content of bulbse1
- Direction
- slightly increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e1“Increasing S alone did not affect the growth or bulb weight of any garlic cultivar, but slightly increased the alliin content of bulbs”
Claim · model-written summary
No symptoms of S deficiency were observed in garlic under greenhouse conditions.
- Taxon
- garlicAllium sativumt0
- Outcome
- symptoms of S deficiencye2
- Setting
- greenhouse conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e2“No symptoms of S deficiency were observed under greenhouse conditions”
Claim · model-written summary
Garlic grown in vitro without added S (0 mg S l–1) had greatly reduced size.
- Taxon
- garlicAllium sativumt0
- Treatment
- 0 mg S l–1e3
- Outcome
- sizee3
- Direction
- greatly reducede3
- Setting
- in vitroe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e3“the same garlic cultivars grown in vitro at 0 mg S l–1 clearly suffered, their size being greatly reduced”
Claim · model-written summary
Atmospheric S contamination may play an important role in S absorption by garlic plants.
- Taxon
- garlicAllium sativume4
- Outcome
- S absorptione4
- Qualifier
- S contamination, such as atmospheric Se4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“This suggests an important role for S contamination, such as atmospheric S, in the process of S absorption by garlic plants”
Claim · model-written summary
Increasing N levels significantly accelerated garlic maturity.
- Taxon
- garlicAllium sativumt0
- Treatment
- Increasing N levelse5
- Outcome
- garlic maturitye5
- Direction
- acceleratede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e5“Increasing N levels significantly accelerated garlic maturity and decreased bulb yield”
Claim · model-written summary
Increasing N levels decreased garlic bulb yield.
- Taxon
- garlicAllium sativumt0
- Treatment
- Increasing N levelse5
- Outcome
- bulb yielde5
- Direction
- decreasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e5“Increasing N levels significantly accelerated garlic maturity and decreased bulb yield”
Claim · model-written summary
The effect of N on organosulphur compound content of garlic bulbs depends on cultivar.
- Taxon
- garlicAllium sativumt0
- Treatment
- Ne6
- Outcome
- organosulphur compound content of bulbse6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e6“The effect of N on the organosulphur compound content of bulbs was cultivar-dependent, but alliin accumulation was not enhanced”
Claim · model-written summary
Increasing N did not enhance alliin accumulation in garlic bulbs.
- Taxon
- garlicAllium sativumt0
- Treatment
- Ne6
- Outcome
- alliin accumulatione6
- Direction
- not enhancede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e6“The effect of N on the organosulphur compound content of bulbs was cultivar-dependent, but alliin accumulation was not enhanced”
Claim · model-written summary
Printanor and Morasol had the highest alliin levels among the garlic cultivars.
- Taxon
- garlicAllium sativumt0
- Material
- ‘Printanor’ and ‘Morasol’e7
- Outcome
- alliin levelse7
- Direction
- higheste7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e7“‘Printanor’ and ‘Morasol’ had the highest alliin levels and were negatively influenced by increasing N”
Claim · model-written summary
Increasing N negatively influenced alliin levels in Printanor and Morasol garlic.
- Taxon
- garlicAllium sativumt0
- Material
- ‘Printanor’ and ‘Morasol’e7
- Treatment
- increasing Ne7
- Outcome
- alliin levelse7
- Direction
- negatively influencede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e7“‘Printanor’ and ‘Morasol’ had the highest alliin levels and were negatively influenced by increasing N”
Claim · model-written summary
A slight synergistic effect of S and N was observed in Messidrôme garlic.
- Taxon
- garlicAllium sativumt0
- Material
- ‘Messidrôme’e0
- Treatment
- S and Ne0
- Outcome
- synergistic effecte0
- Direction
- synergistice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e0“a slight synergistic effect of S and N was observed on ‘Messidrôme’”
Claim · model-written summary
Messidrôme had the highest flavour potential including precursors among the garlic cultivars.
- Taxon
- garlicAllium sativumt0
- Material
- ‘Messidrôme’e0
- Outcome
- flavour potentiale0
- Direction
- higheste0
- Qualifier
- including precursorse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e0“‘Messidrôme’ also had the highest flavour potential when including precursors, and was more efficient in accumulating S into organosulphur compounds”
Claim · model-written summary
Messidrôme was more efficient than the other cultivars in accumulating S into organosulphur compounds.
- Taxon
- garlicAllium sativumt0
- Material
- ‘Messidrôme’e0
- Outcome
- accumulating S into organosulphur compoundse0
- Direction
- more efficiente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic (Allium sativum L.)”
e0“‘Messidrôme’ also had the highest flavour potential when including precursors, and was more efficient in accumulating S into organosulphur compounds”
Claim · model-written summary
The authors advise choosing the most appropriate garlic variety and adapting the N and S fertilisation regime to the environment to produce garlic with the highest health value.
- Taxon
- garlicAllium sativume1
- Outcome
- adapt the N S fertilisation regime according to the environmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It is therefore advisable to choose the most appropriate variety, and to adapt the N S fertilisation regime according to the environment, in order to produce garlic with the highest health-value”
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See all 55 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.