Abstract
The term endophyte refers to interior colonization of plants by microorganisms that do not have pathogenic effects on their hosts, and various endophytes have been found to play important roles in plant vitality. In this study, cultivation-independent terminal restriction fragment length polymorphism analysis of 16S ribosomal DNA directly amplified from plant tissue DNA was used in combination with molecular characterization of isolates to examine the influence of plant stress, achieved by infection with the blackleg pathogen Erwinia carotovora subsp. atroseptica, on the endophytic population in two different potato varieties. Community analysis clearly demonstrated increased bacterial diversity in infected plants compared to that in control plants. The results also indicated that the pathogen stress had a greater impact on the bacteria population than the plant genotype had. Partial sequencing of the 16S rRNA genes of isolated endophytes revealed a broad phylogenetic spectrum of bacteria, including members of the alpha, beta, and gamma subgroups of the Proteobacteria, high- and low-G+C-content gram-positive organisms, and microbes belonging to the Flexibacter-Cytophaga-Bacteroides group. Screening of the isolates for antagonistic activity against E. carotovora subsp. atroseptica revealed that 38% of the endophytes protected tissue culture plants from blackleg disease.
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Claims 4
Claim · model-written summary
Infected potato plants had greater endophytic bacterial diversity than controls.
- Taxon
- Potato Plants
Solanum tuberosumt0 - Treatment
- infected plantse0
- Interactor
- Erwinia carotovora subsp. atroseptica
Pectobacterium atrosepticumt0pathogen - Outcome
- bacterial diversitye0
- Direction
- increasede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased bacterial diversity in infected plants compared to that in control plants”
t0“Potato Plants to Infection with Erwinia carotovora subsp. atroseptica”
t1“Potato Plants to Infection with Erwinia carotovora subsp. atroseptica”
Claim · model-written summary
Pathogen stress affected endophytic bacteria more than potato genotype.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Interactor
- Erwinia carotovora subsp. atrosepticaPectobacterium atrosepticumt0pathogen
- Outcome
- bacteria populatione0
- Direction
- greater impacte0
- Comparator
- plant genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the pathogen stress had a greater impact on the bacteria population than the plant genotype had”
t0“Potato Plants to Infection with Erwinia carotovora subsp. atroseptica”
t1“Potato Plants to Infection with Erwinia carotovora subsp. atroseptica”
Claim · model-written summary
Isolated endophytes spanned multiple bacterial lineages.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- broad phylogenetic spectrum of bacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“revealed a broad phylogenetic spectrum of bacteria, including members of the alpha, beta, and gamma subgroups of the Proteobacteria, high- and low-G+C-content gram-positive organisms, and microbes belonging to the Flexibacter-Cytophaga-Bacteroides group”
t0“potato”
t1“potato”
Claim · model-written summary
Thirty-eight percent of endophytes protected potato tissue culture plants from blackleg.
- Taxon
- Potato PlantsSolanum tuberosumt0
- Treatment
- endophytese0
- Interactor
- Erwinia carotovora subsp. atrosepticaPectobacterium atrosepticume1pathogen
- Outcome
- blackleg diseasee0
- Direction
- protectede0
- Value
- 38%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“38% of the endophytes protected tissue culture plants from blackleg disease”
t0“Potato Plants”
t1“Potato Plants”
e1“plant stress, achieved by infection with the blackleg pathogen Erwinia carotovora subsp. atroseptica”
The same questions in other papers
inoculation · Pectobacterium atrosepticum · Solanum tuberosum (potato)Positive and negative results
2 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
4 papers more in this group
See all 8 papers →infection · Pectobacterium atrosepticum · Solanum tuberosum (potato)Results agree
2 papers in the same direction as this paper
- no effect
- no effect
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.