Abstract
Azospirillum brasilense is a plant growth beneficial rhizobacterium (PGBR) that is used as an inoculant to enhance root architecture in grassland and crop plants. The intent of our study was to develop A. brasilense into a probiotic inoculant for peas and supplement with a seedling exudate compound, to be used together or separately. As an initial characterization of the association of A. brasilense with pea roots, we performed several pea growth experiments. Azospirillum brasilense Sp7T increased the lengths of the five longest lateral roots from each plant by 63.6% and the top 10 lateral roots across 14 plants by 30%, an effect that was abolished in an rpoN mutant and a ΔcheA1/cheA4 mutant. Azospirillum brasilense Cd increased the number of lateral roots by 76%. We detected colonization by this PGBR within the epiphytic root microbiome. To identify a pea seedling exudate compound capable of enhancing lateral pea roots, we tested 15 such compounds. Cytidine was the only one that increased the number of lateral roots, by approximately two-fold, an effect that did not require A. brasilense. We conclude that both A. brasilense and cytidine might be suitable as supplements to enhance lateral roots of pea plants.
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Claims 7
Claim · model-written summary
Azospirillum brasilense Sp7T increased the length of the five longest lateral roots of pea by 63.6%.
- Taxon
- peas
Lathyrus oleraceust0 - Organ / stage
- lateral rootse1
- Treatment
- Azospirillum brasilense Sp7Te1
- Interactor
- Azospirillum brasilense Sp7T
Azospirillum brasilensee1symbiont - Outcome
- lengths of the five longest lateral rootse1
- Direction
- increasede1
- Value
- 63.6%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lateral roots of peas”
e1“Azospirillum brasilense Sp7T increased the lengths of the five longest lateral roots from each plant by 63.6%”
Claim · model-written summary
The lateral root length effect of Azospirillum brasilense was abolished in an rpoN mutant and in a cheA1/cheA4 double mutant.
- Taxon
- peasLathyrus oleraceust0
- Treatment
- rpoN mutant and a ΔcheA1/cheA4 mutante2
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee1symbiont
- Outcome
- effecte2
- Direction
- abolishede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lateral roots of peas”
e1“Azospirillum brasilense Sp7T increased the lengths of the five longest lateral roots from each plant by 63.6%”
e2“an effect that was abolished in an rpoN mutant and a ΔcheA1/cheA4 mutant”
Claim · model-written summary
Azospirillum brasilense Cd increased the number of lateral roots of pea by 76%.
- Taxon
- peasLathyrus oleraceust0
- Organ / stage
- lateral rootse4
- Treatment
- Azospirillum brasilense Cde4
- Interactor
- Azospirillum brasilense CdAzospirillum brasilensee4symbiont
- Outcome
- number of lateral rootse4
- Direction
- increasede4
- Value
- 76%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lateral roots of peas”
e4“Azospirillum brasilense Cd increased the number of lateral roots by 76%”
Claim · model-written summary
Azospirillum brasilense (PGBR) colonized the epiphytic root microbiome of pea.
- Taxon
- peasLathyrus oleraceust0
- Organ / stage
- roote3
- Interactor
- PGBRe3symbiont
- Outcome
- colonizatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lateral roots of peas”
e3“We detected colonization by this PGBR within the epiphytic root microbiome”
Claim · model-written summary
Cytidine, the only one of 15 seedling exudate compounds tested, increased the number of lateral roots of pea about two-fold.
- Taxon
- peasLathyrus oleraceust0
- Treatment
- cytidinee5
- Compound
- cytidinee5
- Outcome
- number of lateral rootse5
- Direction
- increasede5
- Value
- approximately two-folde5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lateral roots of peas”
e5“Cytidine was the only one that increased the number of lateral roots, by approximately two-fold”
Claim · model-written summary
The cytidine effect on pea lateral roots did not require Azospirillum brasilense.
- Taxon
- peasLathyrus oleraceust0
- Treatment
- cytidinee5
- Outcome
- effecte6
- Direction
- did not requiree6
- Comparator
- A. brasilensee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“lateral roots of peas”
e5“Cytidine was the only one that increased the number of lateral roots, by approximately two-fold”
e6“an effect that did not require A. brasilense”
Claim · model-written summary
Authors suggest that Azospirillum brasilense and cytidine might be suitable as supplements to enhance lateral roots of pea plants.
- Taxon
- pea plantsLathyrus oleraceuse7
- Treatment
- A. brasilense and cytidinee7
- Outcome
- suitable as supplementse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“We conclude that both A. brasilense and cytidine might be suitable as supplements to enhance lateral roots of pea plants”
The same questions in other papers
cadmium atom · growth · Lathyrus oleraceus (pea)Results differ
3 papers in the same direction as this paper · 26 in the opposite direction
- negative
- negative
- negative
26 papers more in this group
See all 30 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.