Abstract
Free-living bacteria may trigger the plant growth through production of phytohormones viz. gibberellins, auxins and cytokinins. A total 50 isolates of fluorescent Pseudomonas were screened for their ability to produce cytokinins such as isopentenyladenosine (IPA), dihydroxyzeatin riboside (DHZR) and zeatin riboside (ZR) as plant growth-promoting activity. Pseudomonas fluorescens AK1 and Pseudomonas aeruginosa AK2 were found higher phytohormones producing strains. Of the three cytokinins, IPA was the major cytokinin produced by both isolates in pure culture (5.5 and 2.9 pmol/ml, respectively) and with rice root exudates (5.9 and 3.4 pmol/ml, respectively). Production of ZR and DHZR for both organisms was found after 48 and 72 h. Amount of ZR and DHZR increased with time for both isolates in pure culture conditions. In presence of rice, production of ZR was increased 0.8 and 0.6 pmol/ml for P. fluorescence AK1 and P. aeruginosa AK2, respectively, in comparison with controls. There was no significant difference in the production of DHZR with rice exudates.
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Claims 7
Claim · model-written summary
AK1 and AK2 were higher phytohormone producing strains.
- Taxon
- rice
Oryza sativat0 - Interactor
- Pseudomonas fluorescens AK1
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Pseudomonas fluorescense0other - Outcome
- phytohormones producing strainse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“Pseudomonas fluorescens AK1 and Pseudomonas aeruginosa AK2 were found higher phytohormones producing strains.”
t0“rice”
Claim · model-written summary
IPA was the major cytokinin from both isolates in pure culture and with rice exudates.
- Taxon
- riceOryza sativat0
- Outcome
- IPA was the major cytokinine0
- Qualifier
- with rice root exudatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of the three cytokinins, IPA was the major cytokinin produced by both isolates in pure culture (5.5 and 2.9 pmol/ml, respectively) and with rice root exudates (5.9 and 3.4 pmol/ml, respectively).”
t0“rice”
Claim · model-written summary
ZR and DHZR production by both organisms appeared after 48 and 72 hours.
- Taxon
- riceOryza sativat0
- Outcome
- Production of ZR and DHZRe0
- Qualifier
- after 48 and 72 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Production of ZR and DHZR for both organisms was found after 48 and 72 h.”
t0“rice”
Claim · model-written summary
ZR and DHZR amounts increased over time in pure culture for both isolates.
- Taxon
- riceOryza sativat0
- Outcome
- Amount of ZR and DHZRe0
- Direction
- increasede0
- Setting
- pure culture conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amount of ZR and DHZR increased with time for both isolates in pure culture conditions.”
t0“rice”
Claim · model-written summary
Rice increased ZR production by P. fluorescence AK1 by 0.8 pmol/ml relative to controls.
- Taxon
- riceOryza sativae0
- Treatment
- presence of ricee0
- Interactor
- P. fluorescence AK1e0other
- Outcome
- production of ZRe0
- Direction
- increasede0
- Value
- 0.8e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In presence of rice, production of ZR was increased 0.8 and 0.6 pmol/ml for P. fluorescence AK1 and P. aeruginosa AK2, respectively, in comparison with controls.”
Claim · model-written summary
Rice increased ZR production by P. aeruginosa AK2 by 0.6 pmol/ml relative to controls.
- Taxon
- riceOryza sativae0
- Treatment
- presence of ricee0
- Interactor
- P. aeruginosa AK2
Pseudomonas aeruginosae0other - Outcome
- production of ZRe0
- Direction
- increasede0
- Value
- 0.6 pmol/mle0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In presence of rice, production of ZR was increased 0.8 and 0.6 pmol/ml for P. fluorescence AK1 and P. aeruginosa AK2, respectively, in comparison with controls.”
Claim · model-written summary
Rice exudates did not significantly change DHZR production.
- Taxon
- riceOryza sativae0
- Treatment
- rice exudatese0
- Outcome
- production of DHZRe0
- Direction
- no significant differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant difference in the production of DHZR with rice exudates.”
The same questions in other papers
allelopathy · yield · Oryza sativa (rice)Positive and negative results
1 in the opposite direction
- positive
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.