Abstract
This study was conducted to compare the effects of foliar spray and rhizosphere irrigation with purple phototrophic bacteria (PPB) on growth and stevioside (ST) yield of Stevia. rebaudiana. The S. rebaudiana plants were treated by foliar spray, rhizosphere irrigation, and spray plus irrigation with PPB for 10 days, respectively. All treatments enhanced growth of S. rebaudiana, and the foliar method was more efficient than irrigation. Spraying combined with irrigation increased the ST yield plant (-1) by 69.2% as compared to the control. The soil dehydrogenase activity, S. rebaudiana shoot biomass, chlorophyll content in new leaves, and soluble sugar in old leaves were affected significantly by S+I treatment, too. The PPB probably works in the rhizosphere by activating the metabolic activity of soil bacteria, and on leaves by excreting phytohormones or enhancing the activity of phyllosphere microorganisms.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 10
Claim · model-written summary
Foliar spraying with PPB enhanced Stevia growth.
- Taxon
- S. rebaudiana
Stevia rebaudianae0 - Treatment
- foliar spraye1
- Interactor
- PPBe1symbiont
- Outcome
- growth of S. rebaudianae0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All treatments enhanced growth of S. rebaudiana, and the foliar method was more efficient than irrigation.”
e1“foliar spray, rhizosphere irrigation, and spray plus irrigation with PPB”
Claim · model-written summary
Rhizosphere irrigation with PPB enhanced Stevia growth.
- Taxon
- S. rebaudianaStevia rebaudianae0
- Treatment
- rhizosphere irrigatione1
- Interactor
- PPBe1symbiont
- Outcome
- growth of S. rebaudianae0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All treatments enhanced growth of S. rebaudiana”
e1“foliar spray, rhizosphere irrigation, and spray plus irrigation with PPB”
Claim · model-written summary
Combined spray and irrigation with PPB enhanced Stevia growth.
- Taxon
- S. rebaudianaStevia rebaudianae0
- Treatment
- spray plus irrigation with PPBe1
- Interactor
- PPBe1symbiont
- Outcome
- growth of S. rebaudianae0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All treatments enhanced growth of S. rebaudiana”
e1“spray plus irrigation with PPB”
Claim · model-written summary
Foliar application was more efficient for Stevia growth than irrigation.
- Taxon
- S. rebaudianaStevia rebaudianae1
- Treatment
- foliar methode0
- Interactor
- purple phototrophic bacteriae2symbiont
- Outcome
- growth of S. rebaudianae1
- Direction
- more efficiente0
- Comparator
- irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the foliar method was more efficient than irrigation”
e1“growth of S. rebaudiana”
e2“with purple phototrophic bacteria (PPB)”
Claim · model-written summary
Combined spraying and irrigation raised stevioside yield per plant by 69.2% versus control.
- Taxon
- S. rebaudianaStevia rebaudianae1
- Treatment
- Spraying combined with irrigatione0
- Interactor
- purple phototrophic bacteriae2symbiont
- Outcome
- ST yield plant (-1)e0
- Direction
- increasede0
- Value
- 69.2%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spraying combined with irrigation increased the ST yield plant (-1) by 69.2% as compared to the control.”
e1“S. rebaudiana plants”
e2“with purple phototrophic bacteria (PPB)”
Claim · model-written summary
Spray plus irrigation significantly affected soil dehydrogenase activity.
- Taxon
- S. rebaudianaStevia rebaudianae0
- Treatment
- S+I treatmente0
- Outcome
- soil dehydrogenase activitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil dehydrogenase activity, S. rebaudiana shoot biomass, chlorophyll content in new leaves, and soluble sugar in old leaves were affected significantly by S+I treatment, too.”
Claim · model-written summary
Spray plus irrigation significantly affected shoot biomass.
- Taxon
- S. rebaudianaStevia rebaudianae0
- Treatment
- S+I treatmente0
- Outcome
- shoot biomasse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil dehydrogenase activity, S. rebaudiana shoot biomass, chlorophyll content in new leaves, and soluble sugar in old leaves were affected significantly by S+I treatment, too.”
Claim · model-written summary
Spray plus irrigation significantly affected chlorophyll content in new leaves.
- Taxon
- S. rebaudianaStevia rebaudianae0
- Organ / stage
- new leavese0
- Treatment
- S+I treatmente0
- Outcome
- chlorophyll content in new leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil dehydrogenase activity, S. rebaudiana shoot biomass, chlorophyll content in new leaves, and soluble sugar in old leaves were affected significantly by S+I treatment, too.”
Claim · model-written summary
Spray plus irrigation significantly affected soluble sugar in old leaves.
- Taxon
- S. rebaudianaStevia rebaudianae0
- Organ / stage
- old leavese0
- Treatment
- S+I treatmente0
- Outcome
- soluble sugar in old leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil dehydrogenase activity, S. rebaudiana shoot biomass, chlorophyll content in new leaves, and soluble sugar in old leaves were affected significantly by S+I treatment, too.”
Claim · model-written summary
The authors propose PPB may act in the rhizosphere through soil bacteria and on leaves through phytohormones or phyllosphere microorganisms.
- Taxon
- S. rebaudianaStevia rebaudianae1
- Interactor
- PPBe0symbiont
- Outcome
- works in the rhizospheree0
- Qualifier
- probablye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PPB probably works in the rhizosphere by activating the metabolic activity of soil bacteria, and on leaves by excreting phytohormones or enhancing the activity of phyllosphere microorganisms.”
e1“S. rebaudiana plants”
The same questions in other papers
irrigation · growth · Stevia rebaudianaPositive and negative results
2 in the opposite direction
- negative
- no effect
inoculation · growth · Stevia rebaudianaPositive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →application · yield · Stevia rebaudianaResults agree
3 papers in the same direction as this paper
- positive
- positive
- positive
application · growth · Stevia rebaudianaResults agree
9 papers in the same direction as this paper
- positive
- positive
- positive
6 papers more in this group
See all 10 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.