Abstract
A root system, which serves as the cornerstone of a plant, is the organ system that initially perceives alterations in soil nutrient concentrations and water conditions. Plant hormones constitute highly significant determinants of root growth and development. To explore the response patterns of ‘Sapphire’, ‘Black Emperor’ and ‘Autumn Crisp’ grape ( Vitis vinifera L.) roots to melatonin (MT), grape roots were treated with different concentrations of melatonin respectively. The results revealed that the effects of different MT concentrations were similar to those of different auxin concentrations within the range of 0.1, 0.3, and 0.5 mg · L -1 for IBA and IAA, which promoted root growth at low concentrations but inhibited root growth at high concentrations. Furthermore, compared with the control, 10 μmol · L -1 MT significantly promoted root growth and development by interacting with various endogenous hormones and signaling molecules and with phenols and anthocyanins in grape roots. RNA – seq analysis revealed that a total of 1 419 differentially expressed genes (DEGs) identified after MT treatment were enriched in 20 biological processes associated with secondary metabolism, including the biosynthesis of phenylpropanoids, nitrogen metabolism, plant hormone signal transduction, and galactose metabolism. In particular, 11 genes were significantly enriched in the resveratrol metabolic pathway, with 10 being upregulated from 2.93 – to 9.19 – fold compared with those in the control. Overall, these results suggested that MT promoted the growth and development of grape roots by regulating the levels of hormones and signaling molecules. Our findings revealed a novel role for MT in root growth and development, suggesting that several transcription-related metabolic pathways could be involved in hormone signaling. This study provided valuable information on root growth and development for the breeding of grape varieties.
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Claims 6
Claim · model-written summary
Low melatonin concentrations promoted grape root growth.
Not reportedComparator
Verbatim
e0“promoted root growth at low concentrations but inhibited root growth at high concentrations”
t0“grape root”
e1“after MT treatment”
e2“different MT concentrations”
e3“11 genes were significantly enriched in the resveratrol metabolic pathway”
Claim · model-written summary
High melatonin concentrations inhibited grape root growth.
Not reportedComparator
Verbatim
e0“promoted root growth at low concentrations but inhibited root growth at high concentrations”
t0“grape root”
e1“after MT treatment”
e2“different MT concentrations”
e3“11 genes were significantly enriched in the resveratrol metabolic pathway”
Claim · model-written summary
Melatonin at 10 μmol · L -1 significantly promoted grape root growth and development versus control.
Verbatim
e0“compared with the control, 10 μmol · L -1 MT significantly promoted root growth and development”
t0“grape root”
e1“after MT treatment”
e2“different MT concentrations”
e3“11 genes were significantly enriched in the resveratrol metabolic pathway”
Claim · model-written summary
Melatonin treatment yielded 1 419 differentially expressed genes enriched in 20 secondary-metabolism processes.
Not reportedComparator
Verbatim
e0“a total of 1 419 differentially expressed genes (DEGs) identified after MT treatment were enriched in 20 biological processes associated with secondary metabolism”
t0“grape root”
e1“after MT treatment”
e2“different MT concentrations”
e3“11 genes were significantly enriched in the resveratrol metabolic pathway”
Claim · model-written summary
Eleven genes were enriched in the resveratrol pathway following melatonin treatment.
Not reportedComparator
Verbatim
e0“11 genes were significantly enriched in the resveratrol metabolic pathway”
t0“grape root”
e1“after MT treatment”
e2“different MT concentrations”
e3“11 genes were significantly enriched in the resveratrol metabolic pathway”
Claim · model-written summary
Ten resveratrol-pathway genes were upregulated 2.93–9.19 fold versus control.
Verbatim
e0“10 being upregulated from 2.93 – to 9.19 – fold compared with those in the control”
t0“grape root”
e1“after MT treatment”
e2“different MT concentrations”
e3“11 genes were significantly enriched in the resveratrol metabolic pathway”
The same questions in other papers
melatonin · growth · VitisResults agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.