Abstract
Abstract Young onion plants were grown in glass tubes under short daylength non-inductive for bulbing. Ethrel was added to the growth medium and caused swelling of leaf-bases, bulb initiation and a pronounced increase in the bulbing index. Swelling of leaf-bases was also observed in Ethrel treated plants of leek. In a replicated field experiment seedlings of 5 cultivars were sprayed once or several times with Ethrel at rates of 500, 1,000, 5,000 and 10,000 ppm. Except for one very early cultivar, which showed bulbing due to natural daylength, the treatments resulted in early bulb initiation and in a greatly increased rate of bulbing. Rates of 5,000 and 10,000 ppm Ethrel were more effective than lower concentrations but they also caused retarded leaf growth and a decrease in the final size of bulbs. The possible role of ethylene in bulbing of onion is discussed.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Ethrel caused leaf-base swelling in onion under short days.
- Taxon
- Onion
Allium cepat0 - Treatment
- Ethrele0
- Outcome
- swelling of leaf-basese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Onion”
e0“Ethrel was added to the growth medium and caused swelling of leaf-bases, bulb initiation and a pronounced increase in the bulbing index”
Claim · model-written summary
Ethrel initiated onion bulbs under short days.
- Taxon
- OnionAllium cepat0
- Treatment
- Ethrele0
- Outcome
- bulb initiatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Onion”
e0“Ethrel was added to the growth medium and caused swelling of leaf-bases, bulb initiation and a pronounced increase in the bulbing index”
Claim · model-written summary
Ethrel markedly raised onion bulbing index.
- Taxon
- OnionAllium cepat0
- Treatment
- Ethrele0
- Outcome
- bulbing indexe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Onion”
e0“Ethrel was added to the growth medium and caused swelling of leaf-bases, bulb initiation and a pronounced increase in the bulbing index”
Claim · model-written summary
Ethrel caused leek leaf-base swelling.
- Taxon
- leek
Allium ampeloprasume0 - Treatment
- Ethrele0
- Outcome
- Swelling of leaf-basese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Swelling of leaf-bases was also observed in Ethrel treated plants of leek”
Claim · model-written summary
Field Ethrel treatments initiated bulbs early and increased bulbing rate in all but a naturally bulbing early cultivar.
- Taxon
- OnionAllium cepat0
- Treatment
- the treatmentse0
- Outcome
- early bulb initiation and in a greatly increased rate of bulbinge0
- Direction
- increasede0
- Qualifier
- Except for one very early cultivare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Onion”
e0“Except for one very early cultivar, which showed bulbing due to natural daylength, the treatments resulted in early bulb initiation and in a greatly increased rate of bulbing”
Claim · model-written summary
High Ethrel concentrations were more effective at bulbing than lower concentrations.
- Taxon
- OnionAllium cepat0
- Treatment
- 5,000 and 10,000 ppm Ethrele0
- Outcome
- more effectivee0
- Direction
- more effectivee0
- Comparator
- lower concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Onion”
e0“Rates of 5,000 and 10,000 ppm Ethrel were more effective than lower concentrations but they also caused retarded leaf growth and a decrease in the final size of bulbs”
Claim · model-written summary
High Ethrel concentrations retarded onion leaf growth.
- Taxon
- OnionAllium cepat0
- Treatment
- 5,000 and 10,000 ppm Ethrele0
- Outcome
- leaf growthe0
- Direction
- retardede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Onion”
e0“Rates of 5,000 and 10,000 ppm Ethrel were more effective than lower concentrations but they also caused retarded leaf growth and a decrease in the final size of bulbs”
Claim · model-written summary
High Ethrel concentrations decreased final bulb size.
- Taxon
- OnionAllium cepat0
- Treatment
- 5,000 and 10,000 ppm Ethrele0
- Outcome
- final size of bulbse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Onion”
e0“Rates of 5,000 and 10,000 ppm Ethrel were more effective than lower concentrations but they also caused retarded leaf growth and a decrease in the final size of bulbs”
The same questions in other papers
(2-chloroethyl)phosphonic acid · growth · Allium cepa (onion)Positive and negative results
4 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 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.