Abstract
Melatonin (MT), a tryptophan derivative, plays an important role in the function and survival of organisms. To better understand the role of MT in cold tolerance, the melon (Cucumis melo L.) were sprayed with various concentrations of MT (0, 50, 100, 200 or 400 μM), exposed to cold stress (day/night temperature of 12/6 °C) for 7 d, and then returned to optimal conditions (28/18 °C) for 7-d recovery. The foliar application of MT (especially 200 μM) significantly alleviated cold-induced growth suppression, and MT-treated plants recovered more quickly than untreated plants. Further, MT-treated plants had higher chlorophyll content, photosynthetic rate, stomatal conductance, as well as maximal quantum yield of photosystem (PS) II photochemistry, and efficiency of excitation energy capture of open PS II centres under cold stress than untreated plants. Furthermore, exogenous MT significantly reduced malondialdehyde content and markedly increased the activities of antioxidant enzymes superoxide dismutase (SOD), guaiacol peroxidase (POD), and catalase (CAT) under cold stress. MT also increased expression of antioxidant genes CmSOD, CmPOD, and CmCAT under cold stress. The results indicate that MT pretreatment alleviated the detrimental effects of cold stress and accelerateds the recovery mainly by enhancing photosynthesis and antioxidant capacity in melon leaves.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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
Foliar application of MT (especially 200 μM) significantly alleviated cold-induced growth suppression in melon.
- Taxon
- melon
.jpg?width=60)
Cucumis meloe0 - Treatment
- foliar application of MT (especially 200 μM)e1
- Outcome
- cold-induced growth suppressione1
- Direction
- alleviatede1
- Comparator
- untreated plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“the melon (Cucumis melo L.) were sprayed with various concentrations of MT (0, 50, 100, 200 or 400 μM)”
e1“The foliar application of MT (especially 200 μM) significantly alleviated cold-induced growth suppression, and MT-treated plants recovered more quickly than untreated plants”
Claim · model-written summary
MT-treated melon plants recovered more quickly than untreated plants after cold stress.
- Taxon
- melonCucumis meloe0
- Treatment
- MT-treated plantse1
- Outcome
- recoverede1
- Direction
- more quicklye1
- Comparator
- untreated plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the melon (Cucumis melo L.) were sprayed with various concentrations of MT (0, 50, 100, 200 or 400 μM)”
e1“The foliar application of MT (especially 200 μM) significantly alleviated cold-induced growth suppression, and MT-treated plants recovered more quickly than untreated plants”
Claim · model-written summary
MT-treated melon plants had higher chlorophyll content, photosynthetic rate and stomatal conductance under cold stress than untreated plants.
- Taxon
- melonCucumis meloe0
- Treatment
- MTe2
- Outcome
- chlorophyll content, photosynthetic rate, stomatal conductancee2
- Direction
- highere2
- Qualifier
- under cold stresse2
- Comparator
- untreated plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the melon (Cucumis melo L.) were sprayed with various concentrations of MT (0, 50, 100, 200 or 400 μM)”
e2“MT-treated plants had higher chlorophyll content, photosynthetic rate, stomatal conductance, as well as maximal quantum yield of photosystem (PS) II photochemistry, and efficiency of excitation energy capture of open PS II centres under cold stress than untreated plants”
Claim · model-written summary
MT-treated melon plants had higher maximal quantum yield of PSII photochemistry and efficiency of excitation energy capture under cold stress than untreated plants.
- Taxon
- melonCucumis meloe0
- Treatment
- MTe2
- Outcome
- maximal quantum yield of photosystem (PS) II photochemistry, and efficiency of excitation energy capture of open PS II centrese2
- Direction
- highere2
- Qualifier
- under cold stresse2
- Comparator
- untreated plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the melon (Cucumis melo L.) were sprayed with various concentrations of MT (0, 50, 100, 200 or 400 μM)”
e2“MT-treated plants had higher chlorophyll content, photosynthetic rate, stomatal conductance, as well as maximal quantum yield of photosystem (PS) II photochemistry, and efficiency of excitation energy capture of open PS II centres under cold stress than untreated plants”
Claim · model-written summary
Exogenous MT significantly reduced malondialdehyde content in melon under cold stress.
- Taxon
- melonCucumis meloe0
- Treatment
- exogenous MTe3
- Outcome
- malondialdehyde contente3
- Direction
- reducede3
- Qualifier
- under cold stresse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the melon (Cucumis melo L.) were sprayed with various concentrations of MT (0, 50, 100, 200 or 400 μM)”
e3“exogenous MT significantly reduced malondialdehyde content and markedly increased the activities of antioxidant enzymes superoxide dismutase (SOD), guaiacol peroxidase (POD), and catalase (CAT) under cold stress”
Claim · model-written summary
Exogenous MT markedly increased the activities of superoxide dismutase, guaiacol peroxidase and catalase in melon under cold stress.
- Taxon
- melonCucumis meloe0
- Treatment
- exogenous MTe3
- Outcome
- activities of antioxidant enzymes superoxide dismutase (SOD), guaiacol peroxidase (POD), and catalase (CAT)e3
- Direction
- markedly increasede3
- Qualifier
- under cold stresse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the melon (Cucumis melo L.) were sprayed with various concentrations of MT (0, 50, 100, 200 or 400 μM)”
e3“exogenous MT significantly reduced malondialdehyde content and markedly increased the activities of antioxidant enzymes superoxide dismutase (SOD), guaiacol peroxidase (POD), and catalase (CAT) under cold stress”
Claim · model-written summary
MT increased expression of the antioxidant genes CmSOD, CmPOD and CmCAT under cold stress in melon.
- Taxon
- melonCucumis meloe0
- Treatment
- MTe4
- Gene
- CmSOD, CmPOD, and CmCATe4
- Outcome
- expression of antioxidant genese4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the melon (Cucumis melo L.) were sprayed with various concentrations of MT (0, 50, 100, 200 or 400 μM)”
e4“MT also increased expression of antioxidant genes CmSOD, CmPOD, and CmCAT under cold stress”
Claim · model-written summary
MT pretreatment alleviated the detrimental effects of cold stress and accelerated recovery in melon mainly by enhancing photosynthesis and antioxidant capacity.
- Taxon
- melonCucumis meloe5
- Treatment
- MT pretreatmente5
- Outcome
- recoverye5
- Qualifier
- enhancing photosynthesis and antioxidant capacitye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“MT pretreatment alleviated the detrimental effects of cold stress and accelerateds the recovery mainly by enhancing photosynthesis and antioxidant capacity in melon leaves”
The same questions in other papers
melatonin · molecular: expression · Cucumis melo (muskmelon)Results agree
2 papers in the same direction as this paper
- positive
- positive
melatonin · physiology: photosynthesis · Cucumis melo (muskmelon)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
melatonin · physiology: antioxidant enzymes · Cucumis melo (muskmelon)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
melatonin · physiology: oxidative · Cucumis melo (muskmelon)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →application · control · Cucumis melo (muskmelon)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
3 papers more in this group
See all 7 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.