Abstract
Melatonin (MT) participates in plants' responses in plants’ response to cadmium (Cd) tolerance, although its work model remains elusive. Here, the function of MT in adjusting Cd accumulation in Gossypium hirsutum (CCRI12) was investigated. In this research we observed that exogenous 50 μM MT significantly reduced the Cd accumulation under 100 μМ Cd stress for 7 days of treatment in cotton seedlings. Cd markedly induced the ROS (H2O2, O2-) accumulation and elevated the expression of transporters for Cd uptake and translocation. After application of MT reduced ROS and MDA accumulation in response to high induction of antioxidant defense system; the genes encoding superoxide dismutase (GhSOD), catalase (GhCAT), and peroxidase (GhPOD), ascorbate peroxidase (GhAPX), and glutathione S-transferase (GhGST) were significantly upregulated accompanied by their level of content. Furthermore, MT down-regulated transporters for Cd uptake include Natural Resistance-Associated Macrophage Protein 1 (GhNRAMP3), Zinc/Iron-regulated transporter-like protein (GhZIP1/4/6), Heavy Metal ATPase gene (GhHMA2), and ATP-binding Cassette sub family C (GhABCC3/2). Exogenous application of MT raised the hemicelluloses, cellulose and pectin content accompanied by their expression levels, xyloglucan endotransglucosylase/hydrolase (GhXTH28/6/9/B), cellulose synthase like (GhCSLG1/2) and COBRA-like (GhCOBL4), pectin acetylesterases (GhPAE8/7), pectin methylesterases (GhPME31) which in turn increased the cell wall's binding capacity to Cd.
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Claims 8
Claim · model-written summary
Melatonin reduced cadmium accumulation in cotton seedlings under cadmium stress.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- exogenous 50 μM MTe0
- Outcome
- Cd accumulatione0
- Direction
- reducede0
- Qualifier
- under 100 μМ Cd stress for 7 days of treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous 50 μM MT significantly reduced the Cd accumulation under 100 μМ Cd stress for 7 days of treatment in cotton seedlings”
Claim · model-written summary
Cadmium induced ROS accumulation.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Cde0
- Outcome
- ROS (H2O2, O2-) accumulatione0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd markedly induced the ROS (H2O2, O2-) accumulation”
t0“cotton seedlings”
Claim · model-written summary
Cadmium elevated expression of transporters for cadmium uptake and translocation.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Cde0
- Outcome
- expression of transporters for Cd uptake and translocatione0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cd markedly induced the ROS (H2O2, O2-) accumulation and elevated the expression of transporters for Cd uptake and translocation.”
t0“cotton seedlings”
Claim · model-written summary
Melatonin reduced ROS and MDA accumulation.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- application of MTe0
- Outcome
- ROS and MDA accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After application of MT reduced ROS and MDA accumulation”
t0“cotton seedlings”
Claim · model-written summary
Melatonin upregulated antioxidant defense genes.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- application of MTe1
- Outcome
- genes encoding superoxide dismutase (GhSOD), catalase (GhCAT), and peroxidase (GhPOD), ascorbate peroxidase (GhAPX), and glutathione S-transferase (GhGST)e0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the genes encoding superoxide dismutase (GhSOD), catalase (GhCAT), and peroxidase (GhPOD), ascorbate peroxidase (GhAPX), and glutathione S-transferase (GhGST) were significantly upregulated”
e1“After application of MT reduced ROS and MDA accumulation”
t0“cotton seedlings”
Claim · model-written summary
Melatonin downregulated cadmium uptake transporters.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- MTe0
- Outcome
- transporters for Cd uptakee0
- Direction
- down-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT down-regulated transporters for Cd uptake include Natural Resistance-Associated Macrophage Protein 1 (GhNRAMP3), Zinc/Iron-regulated transporter-like protein (GhZIP1/4/6), Heavy Metal ATPase gene (GhHMA2), and ATP-binding Cassette sub family C (GhABCC3/2)”
t0“cotton seedlings”
Claim · model-written summary
Melatonin increased hemicellulose, cellulose and pectin content.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Exogenous application of MTe0
- Outcome
- hemicelluloses, cellulose and pectin contente0
- Direction
- raisede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of MT raised the hemicelluloses, cellulose and pectin content”
t0“cotton seedlings”
Claim · model-written summary
Melatonin increased cell wall binding capacity to cadmium.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- Exogenous application of MTe1
- Outcome
- cell wall's binding capacity to Cde0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which in turn increased the cell wall's binding capacity to Cd”
e1“Exogenous application of MT raised the hemicelluloses, cellulose and pectin content”
t0“cotton seedlings”
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