Abstract
Abstract The effect of inoculating soil with phosphate rock dissolving bacteria (PRDB) or sulphur (S) oxidising micro‐organisms on shoot dry matter (DM) production and phosphorus (P) uptake of a tomato cultivar ( Lycopersicon esculentum Mill, Virosa NT2) colonised with the vesicular‐arbuscular mycorrhizal (V AM) fungus Gigaspora margarita (Becker & Hall) was determined in a pot trial. Inoculation with PRDB did not affect shoot DM production and P uptake. Shoot DM and P uptake were also not increased when V AM and PRDB were inoculated together. PRDB were temporarily detrimental to shoot DM production. The PRDB population declined soon after soil inoculation but recovered after addition of a phosphate‐free nutrient solution. It is suggested that soil bacteriostasis and a deficiency of easily metabolisable carbon compounds were the causes of the failure of the PRDB culture. Thiobacilli inoculation appeared to be detrimental to shoot DM production, and a combined inoculation of V AM and thiobacilli did not cause any significant increase in shoot DM. The resident thiobacilli were efficient S oxidisers and it is suggested that no inoculation of thiobacilli was required. The reasons for the adverse effects of thiobacilli inoculation are not known.
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Claims 7
Claim · model-written summary
PRDB inoculation did not affect tomato shoot dry matter and phosphorus uptake.
- Treatment
- Inoculation with PRDBe0
- Interactor
- PRDBe0symbiont
- Outcome
- shoot DM production and P uptakee0
- Direction
- did not affecte0
Not reportedTaxonComparator
Verbatim
e0“Inoculation with PRDB did not affect shoot DM production and P uptake”
Claim · model-written summary
Combined V AM and PRDB inoculation did not increase tomato shoot dry matter or phosphorus uptake.
- Treatment
- V AM and PRDB were inoculated togethere0
- Interactor
- V AMe0symbiont
- Second interactor
- PRDBe0symbiont
- Outcome
- Shoot DM and P uptakee0
- Direction
- not increasede0
Not reportedTaxonComparator
Verbatim
e0“Shoot DM and P uptake were also not increased when V AM and PRDB were inoculated together”
Claim · model-written summary
PRDB temporarily reduced tomato shoot dry matter production.
Not reportedTaxonComparator
Verbatim
e0“PRDB were temporarily detrimental to shoot DM production”
Claim · model-written summary
PRDB population declined after soil inoculation and recovered after phosphate-free nutrient addition.
Not reportedTaxon
Verbatim
e0“The PRDB population declined soon after soil inoculation but recovered after addition of a phosphate‐free nutrient solution”
Claim · model-written summary
Thiobacilli inoculation appeared detrimental to tomato shoot dry matter.
- Treatment
- Thiobacilli inoculatione0
- Interactor
- Thiobacillie0other
- Outcome
- shoot DM productione0
- Direction
- detrimentale0
Not reportedTaxonComparator
Verbatim
e0“Thiobacilli inoculation appeared to be detrimental to shoot DM production”
Claim · model-written summary
Joint V AM and thiobacilli inoculation did not significantly increase tomato shoot dry matter.
- Treatment
- combined inoculation of V AM and thiobacillie0
- Interactor
- V AMe0symbiont
- Second interactor
- thiobacillie0other
- Outcome
- shoot DMe0
- Direction
- did not cause any significant increasee0
Not reportedTaxonComparator
Verbatim
e0“a combined inoculation of V AM and thiobacilli did not cause any significant increase in shoot DM”
Claim · model-written summary
Resident thiobacilli were efficient sulfur oxidizers.
Not reportedTaxon
Verbatim
e0“The resident thiobacilli were efficient S oxidisers”