Abstract
The dynamics of the physiological adaptability of plants and the rhizosphere soil environment after waterlogging remain unclear. Here we investigated the mechanisms regulating plant condition and shaping of the rhizosphere microbiome in a pot experiment. In the experiment, we added melatonin to waterlogged plants, which promoted waterlogging relief. The treatment significantly enhanced photosynthesis and the antioxidant capacity of apple plants, and significantly promoted nitrogen (N) utilization efficiency by upregulating genes related to N transport and metabolism. Multiperiod soil microbiome analysis showed the dynamic effects of melatonin on the diversity of the microbial community during waterlogging recovery. Random forest and linear regression analyses were used to screen for potential beneficial bacteria (e.g., Azoarcus, Pseudomonas and Nocardioides) specifically regulated by melatonin and revealed a positive correlation with soil nutrient levels and plant growth. Furthermore, metagenomic analyses revealed the regulatory effects of melatonin on genes involved in N cycling in soil. Melatonin positively contributed to the accumulation of plant dry weight by upregulating the expression of nifD and nifK (N fixation). In summary, melatonin positively regulates physiological functions in plants and the structure and function of the microbial community; it promoted the recovery of apple plants after waterlogging stress.
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Claims 6
Claim · model-written summary
Melatonin significantly enhanced photosynthesis and antioxidant capacity of waterlogged apple plants.
- Taxon
- apple plants
Malus domesticae0 - Treatment
- melatonine6
- Outcome
- photosynthesis and the antioxidant capacitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment significantly enhanced photosynthesis and the antioxidant capacity of apple plants”
e6“In the experiment, we added melatonin to waterlogged plants, which promoted waterlogging relief”
Claim · model-written summary
Melatonin significantly promoted nitrogen utilization efficiency of apple plants by upregulating genes related to N transport and metabolism.
- Taxon
- apple plantsMalus domesticae0
- Treatment
- melatonine6
- Gene
- genes related to N transport and metabolisme1
- Outcome
- nitrogen (N) utilization efficiencye1
- Direction
- promotede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment significantly enhanced photosynthesis and the antioxidant capacity of apple plants”
e1“significantly promoted nitrogen (N) utilization efficiency by upregulating genes related to N transport and metabolism”
e6“In the experiment, we added melatonin to waterlogged plants, which promoted waterlogging relief”
Claim · model-written summary
Melatonin had dynamic effects on the diversity of the rhizosphere microbial community of apple during waterlogging recovery.
- Taxon
- apple plantsMalus domesticae0
- Treatment
- melatonine2
- Outcome
- diversity of the microbial communitye2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment significantly enhanced photosynthesis and the antioxidant capacity of apple plants”
e2“Multiperiod soil microbiome analysis showed the dynamic effects of melatonin on the diversity of the microbial community during waterlogging recovery”
Claim · model-written summary
Potential beneficial bacteria regulated by melatonin were positively correlated with soil nutrient levels and plant growth of apple.
- Taxon
- apple plantsMalus domesticae0
- Treatment
- melatonine3
- Interactor
- Azoarcus, Pseudomonas and Nocardioides
PseudomonasNocardioidesAzoarcuse3other - Outcome
- soil nutrient levels and plant growthe3
- Direction
- positive correlatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment significantly enhanced photosynthesis and the antioxidant capacity of apple plants”
e3“Random forest and linear regression analyses were used to screen for potential beneficial bacteria (e.g., Azoarcus, Pseudomonas and Nocardioides) specifically regulated by melatonin and revealed a positive correlation with soil nutrient levels and plant growth”
Claim · model-written summary
Melatonin positively contributed to plant dry weight accumulation of apple by upregulating nifD and nifK expression.
- Taxon
- apple plantsMalus domesticae0
- Treatment
- Melatonine4
- Gene
- nifD and nifKe4
- Outcome
- accumulation of plant dry weighte4
- Direction
- positively contributede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment significantly enhanced photosynthesis and the antioxidant capacity of apple plants”
e4“Melatonin positively contributed to the accumulation of plant dry weight by upregulating the expression of nifD and nifK (N fixation)”
Claim · model-written summary
Melatonin had regulatory effects on genes involved in N cycling in the soil of waterlogged apple plants.
- Taxon
- apple plantsMalus domesticae0
- Treatment
- melatonine5
- Outcome
- genes involved in N cycling in soile5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment significantly enhanced photosynthesis and the antioxidant capacity of apple plants”
e5“metagenomic analyses revealed the regulatory effects of melatonin on genes involved in N cycling in soil”
The same questions in other papers
melatonin · growth · Malus domestica (apple)Results agree
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- positive
- positive
- positive
melatonin · physiology: photosynthesis · Malus domestica (apple)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 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.