Abstract
Bulb onion (Allium cepa), non-bulbing Japanese bunching onion (A. fistulosum), common chives (A. schoenoprasum) and garlic chives (A. tuberosum) have markedly different harvest indices. With the onset of bulbing, leaf production ceases, photosynthates are reallocated to the bulb, lowering production of new shoots and crop canopy. Successive harvests from the same planting allow for a cumulative harvest index. In testing the influence of growing plants under different CO2 conditions, a set of volatile methyl-ketones have been identified from onion that are emitted at higher levels when plants are grown at elevated CO2 compared to controls grown at ambient CO2 levels. Sensory panel taste testing has indicated differences in flavor for some cultivars when comparisons were made between plants grown at ambient and elevated CO2 conditions. In future studies we will examine if thiosulfinates generated from the enzymatic conversion of alk(en)yl cysteine sulphoxides contribute to flavor differences detected between ambient and elevated CO2 grown plants.
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Claims 2
Claim · model-written summary
Elevated CO2 increased onion volatile methyl-ketone emissions relative to ambient CO2.
- Taxon
- onion
Allium cepae0 - Treatment
- elevated CO2e0
- Outcome
- volatile methyl-ketonese0
- Direction
- higher levelse0
- Comparator
- ambient CO2 levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a set of volatile methyl-ketones have been identified from onion that are emitted at higher levels when plants are grown at elevated CO2 compared to controls grown at ambient CO2 levels”
Claim · model-written summary
Some cultivars differed in flavor between ambient and elevated CO2 conditions.
- Taxon
- OnionAllium cepat0
- Material
- some cultivarse0
- Treatment
- elevated CO2 conditionse0
- Outcome
- flavore0
- Comparator
- ambiente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sensory panel taste testing has indicated differences in flavor for some cultivars when comparisons were made between plants grown at ambient and elevated CO2 conditions”
t0“Onion”
The same questions in other papers
co2 · molecular: metabolites · Allium cepa (onion)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.