Abstract
We isolated and identified a bacterium that could produce IAA and degrade phloridzin in the rhizosphere soil of healthy replanted apple (the rootstock is M9T337 and the scion is Yanfu 3), providing a theoretical basis for reducing the obstacles associated with apple replant disease (ARD). Isolates were screened using Salkowski colorimetry and screening medium for phloridzin. The isolate of interest (W6) was identified as Ochrobactrum haematophilum based on morphological analysis, physiological and biochemical tests, and 16S rDNA sequencing. In a laboratory experiment, W6 produced auxin and promoted the growth of Arabidopsis thaliana roots, and its degradation rate of 100 mg L−1 phloridzin was 62.0%. In a pot experiment, W6 significantly reduced the phenolic acid contents of replanted soil, lowered the abundance of the harmful fungus Fusarium solani, and increased soil enzyme activities, thereby improving the micro-ecological environment of replant soil. W6 increased the root antioxidant enzyme activity and leaf photosynthetic pigment content of replanted Malus hupehensis Rehd. seedlings, effectively alleviating the decrease in net photosynthetic rate, transpiration rate and stomatal conductance caused by ARD. In a field experiment, W6 also promoted the growth of replanted apple (the rootstock is M9T337 and the scion is Yanfu 3) saplings. Therefore, W6 can promote apple growth and degrade phenolic acids, and it can be used as an effective treatment for the reduction of ARD.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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 14
Claim · model-written summary
The W6 isolate was identified as Ochrobactrum haematophilum.
- Taxon
- Ochrobactrum haematophilumBrucella haematophilae0
- Outcome
- identified as Ochrobactrum haematophilume0
Verbatim
e0“The isolate of interest (W6) was identified as Ochrobactrum haematophilum”
Claim · model-written summary
W6 produced auxin.
Verbatim
e0“W6 produced auxin”
Claim · model-written summary
W6 promoted Arabidopsis thaliana root growth in the laboratory.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Treatment
- W6e0
- Interactor
- W6e0symbiont
- Outcome
- growth of Arabidopsis thaliana rootse0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W6 produced auxin and promoted the growth of Arabidopsis thaliana roots”
Claim · model-written summary
W6 degraded 62.0% of 100 mg L−1 phloridzin.
Verbatim
e0“W6 produced auxin and promoted the growth of Arabidopsis thaliana roots, and its degradation rate of 100 mg L−1 phloridzin was 62.0%”
Claim · model-written summary
W6 significantly reduced phenolic acids in replanted soil.
Not reportedTaxonComparator
Verbatim
e0“W6 significantly reduced the phenolic acid contents of replanted soil”
Claim · model-written summary
W6 lowered Fusarium solani abundance in replanted soil.
- Taxon
- Fusarium solani
_Sacc._5393379.jpg?width=60)
Fusarium solanie0 - Treatment
- W6e0
- Outcome
- abundance of the harmful fungus Fusarium solanie0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Sacc._5393379.jpg?width=500)
Verbatim
e0“W6 significantly reduced the phenolic acid contents of replanted soil, lowered the abundance of the harmful fungus Fusarium solani”
Claim · model-written summary
W6 increased soil enzyme activity.
Not reportedTaxonComparator
Verbatim
e0“W6 significantly reduced the phenolic acid contents of replanted soil, lowered the abundance of the harmful fungus Fusarium solani, and increased soil enzyme activities”
Claim · model-written summary
W6 increased root antioxidant enzyme activity in replanted Malus hupehensis seedlings.
- Taxon
- Malus hupehensis Rehd.
Malus hupehensise0 - Organ / stage
- roote0
- Treatment
- W6e0
- Outcome
- root antioxidant enzyme activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W6 increased the root antioxidant enzyme activity and leaf photosynthetic pigment content of replanted Malus hupehensis Rehd. seedlings”
Claim · model-written summary
W6 increased leaf photosynthetic pigment content in replanted Malus hupehensis seedlings.
- Taxon
- Malus hupehensis Rehd.Malus hupehensise0
- Organ / stage
- leafe0
- Treatment
- W6e0
- Outcome
- leaf photosynthetic pigment contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W6 increased the root antioxidant enzyme activity and leaf photosynthetic pigment content of replanted Malus hupehensis Rehd. seedlings”
Claim · model-written summary
W6 alleviated the ARD-related decline in net photosynthesis of Malus hupehensis seedlings.
- Taxon
- Malus hupehensis Rehd.Malus hupehensise0
- Treatment
- W6e0
- Outcome
- net photosynthetic ratee0
- Direction
- alleviatinge0
- Comparator
- ARDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W6 increased the root antioxidant enzyme activity and leaf photosynthetic pigment content of replanted Malus hupehensis Rehd. seedlings, effectively alleviating the decrease in net photosynthetic rate, transpiration rate and stomatal conductance caused by ARD”
Claim · model-written summary
W6 alleviated the ARD-related decline in transpiration of Malus hupehensis seedlings.
- Taxon
- Malus hupehensis Rehd.Malus hupehensise0
- Treatment
- W6e0
- Outcome
- transpiration ratee0
- Direction
- alleviatinge0
- Comparator
- ARDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W6 increased the root antioxidant enzyme activity and leaf photosynthetic pigment content of replanted Malus hupehensis Rehd. seedlings, effectively alleviating the decrease in net photosynthetic rate, transpiration rate and stomatal conductance caused by ARD”
Claim · model-written summary
W6 alleviated the ARD-related decline in stomatal conductance of Malus hupehensis seedlings.
- Taxon
- Malus hupehensis Rehd.Malus hupehensise0
- Treatment
- W6e0
- Outcome
- stomatal conductancee0
- Direction
- alleviatinge0
- Comparator
- ARDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W6 increased the root antioxidant enzyme activity and leaf photosynthetic pigment content of replanted Malus hupehensis Rehd. seedlings, effectively alleviating the decrease in net photosynthetic rate, transpiration rate and stomatal conductance caused by ARD”
Claim · model-written summary
W6 promoted growth of replanted apple saplings in the field.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“W6 also promoted the growth of replanted apple (the rootstock is M9T337 and the scion is Yanfu 3) saplings”
Claim · model-written summary
The authors propose W6 as a treatment to reduce apple replant disease.
- Taxon
- apple
Malus domesticat0 - Outcome
- effective treatment for the reduction of ARDe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it can be used as an effective treatment for the reduction of ARD”
t0“apple replant”