Abstract
Melatonin (MEL) and salicylic acid (SA), synthesised from the same precursor molecule chorismic acid, are known as molecules that support plants to develop tolerance against stress factors. In this study, antagonistic/synergistic effects of MEL and SA were determined on the basis of germination, plant growth and biochemical changes using onion with relatively small genome under drought stress. Germination and development of bulbs exposed to drought at -0.60 MPa were suppressed. Only MEL treatments (100, 200, 300 mM) had a promoting effect, while interestingly SA (10, 20, 30 mM) and MEL/SA combinations suppressed germination and vegetative growth. Even root formation was completely inhibited in the presence of SA. 200 mM MEL increased the germination rate up to 88 % under drought conditions. In addition, the number of leaves, which is an important yield parameter for onion, increased to 9.3 in 200 mM MEL , even exceeding the control treatment. Proteinogenic amino acids, water soluble vitamins and mineral content increased as a result of MEL applications. On the other hand, there was no increase in organic acid content as expected in onion, which is an alkaline sensitive species. SA and SA/MEL suppressed the growth by causing protein degradation. It was determined that SA doses used in the study had antagonistic effect with MEL under drought stress and reversed the ameliorative effect of MEL under drought conditions. For this reason, it is recommended that MEL/SA combinations should be used more carefully depending on plant species and dose.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 14
Claim · model-written summary
Drought suppressed onion bulb germination and development.
- Taxon
- Allium cepa L.
Allium cepat0 - Treatment
- drought at -0.60 MPae0
- Outcome
- Germination and development of bulbse0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Germination and development of bulbs exposed to drought at -0.60 MPa were suppressed.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
Melatonin promoted onion germination and vegetative growth.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- MEL treatments (100, 200, 300 mM)e0
- Outcome
- promoting effecte0
- Direction
- promotinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only MEL treatments (100, 200, 300 mM) had a promoting effect”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
Salicylic acid suppressed onion germination and vegetative growth.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- SA (10, 20, 30 mM)e0
- Outcome
- germination and vegetative growthe0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA (10, 20, 30 mM) and MEL/SA combinations suppressed germination and vegetative growth.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
Melatonin–salicylic acid combinations suppressed onion germination and growth.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- MEL/SA combinationse0
- Outcome
- germination and vegetative growthe0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA (10, 20, 30 mM) and MEL/SA combinations suppressed germination and vegetative growth.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
Salicylic acid completely inhibited onion root formation.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- SAe0
- Outcome
- root formatione0
- Direction
- completely inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root formation was completely inhibited in the presence of SA.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
At 200 mM, melatonin increased onion germination to 88% under drought.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- 200 mM MELe0
- Outcome
- germination ratee0
- Direction
- increasede0
- Value
- 88 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“200 mM MEL increased the germination rate up to 88 % under drought conditions.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
At 200 mM, melatonin increased onion leaf number to 9.3.
- Taxon
- onionAllium cepae0
- Treatment
- 200 mM MELe0
- Outcome
- number of leavese0
- Direction
- increasede0
- Value
- 9.3e0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of leaves, which is an important yield parameter for onion, increased to 9.3 in 200 mM MEL , even exceeding the control treatment.”
Claim · model-written summary
Melatonin increased onion Proteinogenic amino acids.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- MEL applicationse0
- Outcome
- Proteinogenic amino acidse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proteinogenic amino acids, water soluble vitamins and mineral content increased as a result of MEL applications.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
Melatonin increased onion water soluble vitamins.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- MEL applicationse0
- Outcome
- water soluble vitaminse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proteinogenic amino acids, water soluble vitamins and mineral content increased as a result of MEL applications.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
Melatonin increased onion mineral content.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- MEL applicationse0
- Outcome
- mineral contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proteinogenic amino acids, water soluble vitamins and mineral content increased as a result of MEL applications.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
Organic acid content did not increase in onion.
- Taxon
- onionAllium cepae0
- Outcome
- organic acid contente0
- Direction
- no increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no increase in organic acid content as expected in onion”
Claim · model-written summary
Salicylic acid suppressed onion growth through protein degradation.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- SAe0
- Outcome
- growthe0
- Direction
- suppressede0
- Qualifier
- protein degradatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA and SA/MEL suppressed the growth by causing protein degradation.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
Salicylic acid–melatonin suppressed onion growth through protein degradation.
- Taxon
- Allium cepa L.Allium cepat0
- Treatment
- SA/MELe0
- Outcome
- growthe0
- Direction
- suppressede0
- Qualifier
- protein degradatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA and SA/MEL suppressed the growth by causing protein degradation.”
t0“Allium cepa L.”
t1“Allium cepa L.”
Claim · model-written summary
The authors recommend caution in using melatonin and salicylic acid combinations by plant species and dose.
- Taxon
- Allium cepa L.Allium cepat0
- Outcome
- MEL/SA combinations should be used more carefullye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is recommended that MEL/SA combinations should be used more carefully depending on plant species and dose.”
t0“Allium cepa L.”
t1“Allium cepa L.”
The same questions in other papers
salicylic acid · growth · Allium cepa (onion)Results differ
1 paper in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
17 papers more in this group
See all 21 papers →drought · growth · Allium cepa (onion)Positive and negative results
10 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 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.