Abstract
ABSTRACT This study investigated how sequentially exposing plants to sodium chloride (NaCl) would affect growth and the flavor quality of onion (Allium cepaL.) bulbs at harvest. In a greenhouse experiment beginning 74 d before harvest, 100 mM concentrations of NaCl were applied at biweekly intervals to onions growing in nutrient solutions. At harvest, fresh weights (FW) were measured and the bulbs were analyzed for soluble solids content (SSC), bulb pungency as measured by total pyruvate (TPY), bulb sulfur (S) and sulfate (SO4 −2) accumulation, flavor precursors, and their biosynthetic intermediates. Bulb and leaf FW decreased linearly the earlier NaCl was added during plant growth and development. While total bulb S was significantly affected by sequential addition of NaCl, bulb SO4 −2 was unaffected. Bulb pungency was significantly reduced by NaCl, especially when NaCl was introduced during early bulb development. NaCl generally reduced flavor precursor accumulation in a quadratic response, with the greatest depression occurring when plants were exposed to NaCl beginning in the early stages of bulbing. Significant reductions in plant growth and changes in the S-compounds associated with flavor suggested that the duration and timing of NaCl exposure are important in onion. Keywords: Allium cepa cysteine sulfoxidespungencysaltsulfur
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Claims 5
Claim · model-written summary
Earlier NaCl application linearly decreased onion bulb and leaf fresh weights.
- Taxon
- Onion
Allium cepat0 - Treatment
- NaCle0
- Outcome
- Bulb and leaf FWe0
- Direction
- decreased linearlye0
- Comparator
- the earlier NaCl was addede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulb and leaf FW decreased linearly the earlier NaCl was added during plant growth and development.”
t0“Onion”
Claim · model-written summary
Sequential NaCl addition significantly affected total bulb sulfur.
- Taxon
- OnionAllium cepat0
- Treatment
- sequential addition of NaCle0
- Outcome
- total bulb Se0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total bulb S was significantly affected by sequential addition of NaCl”
t0“Onion”
Claim · model-written summary
Sequential NaCl addition did not affect bulb sulfate.
- Taxon
- OnionAllium cepat0
- Treatment
- NaCle1
- Outcome
- bulb SO4 −2e0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bulb SO4 −2 was unaffected”
e1“While total bulb S was significantly affected by sequential addition of NaCl”
t0“Onion”
Claim · model-written summary
NaCl significantly reduced bulb pungency, particularly with application in early bulb development.
- Taxon
- OnionAllium cepat0
- Treatment
- NaCle0
- Outcome
- Bulb pungencye0
- Direction
- reducede0
- Qualifier
- early bulb developmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulb pungency was significantly reduced by NaCl, especially when NaCl was introduced during early bulb development.”
t0“Onion”
Claim · model-written summary
NaCl generally reduced flavor precursor accumulation, most when exposure began in early bulbing.
- Taxon
- OnionAllium cepat0
- Treatment
- NaCle0
- Outcome
- flavor precursor accumulatione0
- Direction
- reducede0
- Qualifier
- early stages of bulbinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl generally reduced flavor precursor accumulation in a quadratic response, with the greatest depression occurring when plants were exposed to NaCl beginning in the early stages of bulbing.”
t0“Onion”
The same questions in other papers
sodium chloride · quality: general · Allium cepa (onion)Positive and negative results
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- positive
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sodium chloride · growth · Allium cepa (onion)Results agree
11 papers in the same direction as this paper
- negative
- negative
- negative
8 papers more in this group
See all 12 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.