Abstract
Abstract This paper was conducted to explore the effects of melatonin (MT) on the senescence of stored Chinese flowering cabbage and the potential modulatory mechanisms involved. The physiological findings demonstrated that MT successfully reduced chlorophyll loss and improved the photochemical effectiveness of cabbage leaves. In addition, MT decreased the transcription of senescence-associated genes (BrSAG12) and genes responsible for chlorophyll breakdown. Transcriptome analysis showed that MT-regulated genes were enriched in oxidative phosphorylation, hormone metabolism and signal transduction, and MT treatment reduced the high expression of genes linked to generation of reactive oxygen species (ROS), energy metabolism, phytohormone (abscisic acid (ABA), ethylene (ET), and jasmonic acid (JA)) biological synthesis and signal transduction while promoting the activation of genes related to scavenging ROS, energy biosynthesis and plant–pathogen interactions. We emphasized the examination of the potential interaction between phytohormone metabolism and MT. The results showed that the application of MT decreased ABA, ET, and JA levels as well as the expression of their biosynthesis genes, concurrently maintaining higher expression of cytokinin, auxin and gibberellin biosynthetic genes and lower expression of degradation genes. Regulatory networks of transcription factors (TFs) and genes related to ABA, ET and JA metabolism showed that TFs such as DNA-binding One Zinc Finger 5.7 (DOF5.7), WRKY40, and homeobox-leucine zipper protein-16 (ATHB-16) might play important transcriptional regulatory roles in mediating MT postponed leaf senescence. Taken together, these findings suggested that the postponed senescence of cabbage treated with MT might be ascribed to the regulated oxidative phosphorylation, energy, phytohormone metabolism, and transcription factors.
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Claims 9
Claim · model-written summary
Melatonin reduced chlorophyll loss and improved photochemical effectiveness.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Treatment
- MTe0
- Outcome
- reduced chlorophyll loss and improved the photochemical effectivenesse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT successfully reduced chlorophyll loss and improved the photochemical effectiveness of cabbage leaves.”
Claim · model-written summary
Melatonin decreased transcription of BrSAG12 and chlorophyll-breakdown genes.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- MTe0
- Gene
- BrSAG12e0
- Outcome
- transcription of senescence-associated genes (BrSAG12) and genes responsible for chlorophyll breakdowne0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT decreased the transcription of senescence-associated genes (BrSAG12) and genes responsible for chlorophyll breakdown.”
t0“Chinese flowering cabbage”
Claim · model-written summary
MT-regulated genes were enriched in oxidative phosphorylation, hormone metabolism and signal transduction.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Outcome
- enriched in oxidative phosphorylation, hormone metabolism and signal transductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT-regulated genes were enriched in oxidative phosphorylation, hormone metabolism and signal transduction”
t0“Chinese flowering cabbage”
Claim · model-written summary
MT reduced expression of genes linked to ROS production, energy metabolism and hormone biosynthesis and signaling.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- MT treatmente0
- Outcome
- high expression of genes linked to generation of reactive oxygen species (ROS), energy metabolism, phytohormone (abscisic acid (ABA), ethylene (ET), and jasmonic acid (JA)) biological synthesis and signal transductione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MT treatment reduced the high expression of genes linked to generation of reactive oxygen species (ROS), energy metabolism, phytohormone (abscisic acid (ABA), ethylene (ET), and jasmonic acid (JA)) biological synthesis and signal transduction”
t0“Chinese flowering cabbage”
Claim · model-written summary
MT promoted genes for ROS scavenging, energy biosynthesis and plant–pathogen interactions.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Outcome
- activation of genes related to scavenging ROS, energy biosynthesis and plant–pathogen interactionse0
- Direction
- promotinge0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoting the activation of genes related to scavenging ROS, energy biosynthesis and plant–pathogen interactions.”
t0“Chinese flowering cabbage”
Claim · model-written summary
MT decreased ABA, ET and JA levels and expression of their biosynthesis genes.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- application of MTe0
- Outcome
- ABA, ET, and JA levels as well as the expression of their biosynthesis genese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of MT decreased ABA, ET, and JA levels as well as the expression of their biosynthesis genes”
t0“Chinese flowering cabbage”
Claim · model-written summary
MT maintained higher expression of cytokinin, auxin and gibberellin biosynthetic genes.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Outcome
- expression of cytokinin, auxin and gibberellin biosynthetic genese0
- Direction
- highere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintaining higher expression of cytokinin, auxin and gibberellin biosynthetic genes”
t0“Chinese flowering cabbage”
Claim · model-written summary
MT maintained lower expression of hormone degradation genes.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Outcome
- expression of degradation genese0
- Direction
- lowere0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower expression of degradation genes”
t0“Chinese flowering cabbage”
Claim · model-written summary
DOF5.7, WRKY40 and ATHB-16 might regulate MT-delayed senescence.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Gene
- DOF5.7e0
- Outcome
- MT postponed leaf senescencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TFs such as DNA-binding One Zinc Finger 5.7 (DOF5.7), WRKY40, and homeobox-leucine zipper protein-16 (ATHB-16) might play important transcriptional regulatory roles in mediating MT postponed leaf senescence.”
t0“Chinese flowering cabbage”
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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.