Abstract
Seed and soil treatment with Pseudomonas fluorescens RGAF 19, P. fluorescens RG 26, Bacillus megaterium RGAF 51 and Paenibacillus macerans RGAF 101 can suppress fusarium wilt of chickpea ( Cicer arietinum ), but the extent of disease suppression by these rhizobacteria is modulated by soil temperature. In this work, the effect of temperature on plant–rhizobacteria interactions was assessed in relation to biocontrol potential for suppression of fusarium wilt of chickpea. Seed and soil treatment with those rhizobacteria delayed seedling emergence compared with nontreated controls, and either increased or had no deleterious effect on chickpea growth. Pseudomonas fluorescens isolates significantly increased chickpea shoot dry weight at 20°C and root dry weight at 25 and 30°C. All bacterial isolates colonized the chickpea rhizosphere and internal stem tissues at 20, 25 and 30°C, and there was a positive linear trend between bacterial population size in the rhizosphere and temperature increase. The maximum inhibition of mycelial growth and conidial germination of Fusarium oxysporum f. sp. ciceris race 5 in vitro occurred at a temperature range optimal for bacterial growth and production of inhibitory metabolites. These results demonstrate the need to understand the effects of environmental factors on the biological activities of introduced rhizobacteria of significant importance for plant disease suppression.
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Claims 7
Claim · model-written summary
Rhizobacterial seed and soil treatment delayed chickpea seedling emergence relative to controls.
- Taxon
- chickpea
Cicer arietinume1 - Treatment
- Seed and soil treatment with those rhizobacteriae0
- Outcome
- seedling emergencee0
- Direction
- delayede0
- Comparator
- nontreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed and soil treatment with those rhizobacteria delayed seedling emergence compared with nontreated controls”
e1“chickpea ( Cicer arietinum )”
Claim · model-written summary
Rhizobacterial treatments increased or did not harm chickpea growth.
- Taxon
- chickpeaCicer arietinume0
- Treatment
- those rhizobacteriae1
- Outcome
- chickpea growthe0
- Direction
- increased or had no deleterious effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“either increased or had no deleterious effect on chickpea growth”
e1“Seed and soil treatment with those rhizobacteria”
Claim · model-written summary
Pseudomonas fluorescens significantly increased chickpea shoot dry weight at 20°C.
- Taxon
- chickpeaCicer arietinume0
- Treatment
- Pseudomonas fluorescens isolatese0
- Interactor
- Pseudomonas fluorescens
.JPG?width=60)
Pseudomonas fluorescense0biocontrol_agent - Outcome
- chickpea shoot dry weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“Pseudomonas fluorescens isolates significantly increased chickpea shoot dry weight at 20°C”
Claim · model-written summary
Pseudomonas fluorescens significantly increased chickpea root dry weight at 25 and 30°C.
- Taxon
- chickpeaCicer arietinume0
- Treatment
- Pseudomonas fluorescens isolatese0
- Interactor
- Pseudomonas fluorescensPseudomonas fluorescense0biocontrol_agent
- Outcome
- root dry weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pseudomonas fluorescens isolates significantly increased chickpea shoot dry weight at 20°C and root dry weight at 25 and 30°C”
Claim · model-written summary
All bacterial isolates colonized chickpea rhizosphere and internal stems at 20, 25 and 30°C.
- Taxon
- chickpeaCicer arietinume0
- Outcome
- colonized the chickpea rhizosphere and internal stem tissuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All bacterial isolates colonized the chickpea rhizosphere and internal stem tissues at 20, 25 and 30°C”
Claim · model-written summary
Rhizosphere bacterial population size rose linearly with temperature.
- Taxon
- chickpeaCicer arietinume1
- Treatment
- temperature increasee0
- Outcome
- bacterial population size in the rhizospheree0
- Direction
- positive linear trende0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a positive linear trend between bacterial population size in the rhizosphere and temperature increase”
e1“chickpea rhizosphere”
Claim · model-written summary
In vitro inhibition of Fusarium mycelial growth peaked in a temperature range favorable to bacterial growth and inhibitory metabolites.
- Taxon
- Fusarium oxysporum f. sp. ciceris race 5
Fusarium oxysporum f. sp. cicerise0 - Outcome
- inhibition of mycelial growth and conidial germinatione0
- Direction
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum inhibition of mycelial growth and conidial germination of Fusarium oxysporum f. sp. ciceris race 5 in vitro occurred at a temperature range optimal for bacterial growth and production of inhibitory metabolites”
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See all 152 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.