Abstract
Plant growth promotion by Pseudomonas sp. 31-12 incorporated into a lettuce seed pelleting matrix was studied. We examined (1) the effect of five rhizosphere derived bacterial strains on green oak lettuce ( Lactuca sativa L.) seed germination, root and shoot growth, as a strain selection step for seed coating and seed pelletizing studies, (2) population stability of Pseudomonas sp. 31-12 incorporated into a pelleting matrix on lettuce seed stored three months at 4 °C, and (3) lettuce growth promotion in the laboratory and greenhouse by Pseudomonas sp. 31-12 coated and pelletized seed. A spontaneous streptomycin mutant of Pseudomonas sp. 31-12 (str) was used to determine population size on seed and roots of 15- and 30-day-old lettuce. The population of Pseudomonas sp. 31-12str on coated and pelleted seed decreased from 10 4 cfu/seed to 10 3 cfu/seed after 3 months storage at 4 °C. However, the population exceeded 10 4 cfu/g root dry mass and 10 5 /g root dry mass after 15 days and 30 days in the greenhouse. Leaf fresh mass was significantly increased ( P ≤ 0.05) with Pseudomonas sp. 31-12 seed treatment as compared to noninoculated seed. In conclusion, pelletized lettuce seed with Pseudomonas sp. 31-12 promoted growth and yield in the greenhouse.
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Claims 5
Claim · model-written summary
Pseudomonas sp. 31-12 population on coated and pelleted lettuce seed decreased from 10 4 to 10 3 cfu per seed after 3 months storage at 4 °C.
- Taxon
- lettuce
Lactuca sativae1 - Treatment
- 3 months storage at 4 °Ce0
- Interactor
- Pseudomonas sp. 31-12stre0symbiont
- Outcome
- population of Pseudomonas sp. 31-12str on coated and pelleted seede0
- Direction
- decreasede0
- Value
- from 10 4 cfu/seed to 10 3 cfu/seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The population of Pseudomonas sp. 31-12str on coated and pelleted seed decreased from 10 4 cfu/seed to 10 3 cfu/seed after 3 months storage at 4 °C”
e1“on lettuce seed stored three months at 4 °C”
Claim · model-written summary
Pseudomonas sp. 31-12 population on lettuce roots exceeded 10 4 cfu per g root dry mass after 15 days in the greenhouse.
- Taxon
- lettuceLactuca sativae2
- Interactor
- Pseudomonas sp. 31-12
Pseudomonas sp. 31-12e2symbiont - Outcome
- populatione3
- Value
- 10 4 cfu/g root dry masse3
- Qualifier
- 15 dayse3
- Setting
- greenhousee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“A spontaneous streptomycin mutant of Pseudomonas sp. 31-12 (str) was used to determine population size on seed and roots of 15- and 30-day-old lettuce”
e3“population exceeded 10 4 cfu/g root dry mass and 10 5 /g root dry mass after 15 days and 30 days in the greenhouse”
Claim · model-written summary
Pseudomonas sp. 31-12 population on lettuce roots exceeded 10 5 cfu per g root dry mass after 30 days in the greenhouse.
- Taxon
- lettuceLactuca sativae2
- Interactor
- Pseudomonas sp. 31-12Pseudomonas sp. 31-12e2symbiont
- Outcome
- populatione3
- Value
- 10 5 /g root dry masse3
- Qualifier
- 30 dayse3
- Setting
- greenhousee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“A spontaneous streptomycin mutant of Pseudomonas sp. 31-12 (str) was used to determine population size on seed and roots of 15- and 30-day-old lettuce”
e3“population exceeded 10 4 cfu/g root dry mass and 10 5 /g root dry mass after 15 days and 30 days in the greenhouse”
Claim · model-written summary
Lettuce seed treated with Pseudomonas sp. 31-12 had significantly increased leaf fresh mass compared with noninoculated seed.
- Taxon
- lettuceLactuca sativae6
- Treatment
- Pseudomonas sp. 31-12 seed treatmente4
- Interactor
- Pseudomonas sp. 31-12Pseudomonas sp. 31-12e4symbiont
- Outcome
- Leaf fresh masse4
- Direction
- increasede4
- Qualifier
- P ≤ 0.05e4
- Comparator
- noninoculated seede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Leaf fresh mass was significantly increased ( P ≤ 0.05) with Pseudomonas sp. 31-12 seed treatment as compared to noninoculated seed”
e6“(3) lettuce growth promotion in the laboratory and greenhouse”
Claim · model-written summary
Pelletized lettuce seed with Pseudomonas sp. 31-12 promoted growth and yield in the greenhouse.
- Taxon
- lettuceLactuca sativae5
- Treatment
- pelletized lettuce seed with Pseudomonas sp. 31-12e5
- Interactor
- Pseudomonas sp. 31-12Pseudomonas sp. 31-12e5symbiont
- Outcome
- growth and yielde5
- Direction
- promotede5
- Setting
- greenhousee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“pelletized lettuce seed with Pseudomonas sp. 31-12 promoted growth and yield in the greenhouse”
The same questions in other papers
Pseudomonas · growth · Lactuca sativa (garden lettuce)Results agree
2 papers in the same direction as this paper
- positive
- positive
seed treatment · growth · Lactuca sativa (garden lettuce)Positive and negative results
45 papers in the same direction as this paper · 3 in the opposite direction
- positive
- no effect
- negative
45 papers more in this group
See all 49 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.