Abstract
Bradyrhizobium sp. strain SUTN9‐2 was confirmed as rice endophytic bacteria and also as rice growth promotion agent. SUTN9‐2 showed the capability of plant growth promotion characteristics, such as indole‐3‐acetic acid (IAA) and 1‐amino‐cyclopropane‐1‐carboxylic acid (ACC) deaminase productions and nitrogen fixation. In this study, the ability of SUTN9‐2 to stimulate rice growth was investigated at different stages with N‐free and NH4NO3 under in vivo condition. The rice dry weight and chlorophyll content could be enhanced when SUTN9‐2 was inoculated in N‐free, especially at seedling stage (7 and 14 dai). The rice dry weight was also increased when SUTN9‐2 was inoculated with NH4NO3 at 7 and14 dai. The results of quantitative analysis of IAA and ACC deaminase were inconsistent with the expression of genes involved in IAA (nit) and ACC deaminase (acdS) productions. This inconsistently could implied that IAA and ACC deaminase produced from SUTN9‐2 do not directly affect rice growth, but other factors resulting from the production of IAA and ACC deaminase could be involved. Moreover, the expression of genes involved in nitrogen fixation (nifH and nifV) of SUTN9‐2 was also induced in rice tissues. This finding suggested that rice growth promotion may be supported by NH4NO3 together with nitrogen fixation by SUTN9‐2. Indole‐3‐acetic acid, 1‐amino‐cyclopropane‐1‐carboxylic acid deaminase productions and nitrogen fixation may play important roles in rice growth promotion by endophytic SUTN9‐2, especially at early rice seedling growth stage, which has the potential to be used as rice seedling growth promoter in the system of rice intensification.
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Claims 8
Claim · model-written summary
SUTN9-2 was confirmed as a rice endophyte and growth promotion agent.
- Taxon
- rice
Oryza sativae0 - Interactor
- Bradyrhizobium sp. strain SUTN9‐2
Bradyrhizobium sp.e0symbiont - Outcome
- rice endophytic bacteria and also as rice growth promotion agente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bradyrhizobium sp. strain SUTN9‐2 was confirmed as rice endophytic bacteria and also as rice growth promotion agent”
Claim · model-written summary
SUTN9-2 produced IAA and ACC deaminase and fixed nitrogen.
- Taxon
- riceOryza sativat0
- Interactor
- SUTN9‐2e0symbiont
- Outcome
- indole‐3‐acetic acid (IAA) and 1‐amino‐cyclopropane‐1‐carboxylic acid (ACC) deaminase productions and nitrogen fixatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SUTN9‐2 showed the capability of plant growth promotion characteristics, such as indole‐3‐acetic acid (IAA) and 1‐amino‐cyclopropane‐1‐carboxylic acid (ACC) deaminase productions and nitrogen fixation”
t0“rice”
Claim · model-written summary
SUTN9-2 inoculation in N-free conditions enhanced rice dry weight and chlorophyll content, especially at the seedling stage.
- Taxon
- riceOryza sativae0
- Organ / stage
- seedling stagee0
- Treatment
- SUTN9‐2 was inoculated in N‐freee0
- Interactor
- SUTN9‐2e0symbiont
- Outcome
- rice dry weight and chlorophyll contente0
- Direction
- enhancede0
- Qualifier
- 7 and 14 daie0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rice dry weight and chlorophyll content could be enhanced when SUTN9‐2 was inoculated in N‐free, especially at seedling stage (7 and 14 dai)”
Claim · model-written summary
SUTN9-2 inoculation with NH4NO3 increased rice dry weight at 7 and 14 days after inoculation.
- Taxon
- riceOryza sativae0
- Treatment
- SUTN9‐2 was inoculated with NH4NO3e0
- Interactor
- SUTN9‐2e0symbiont
- Outcome
- rice dry weighte0
- Direction
- increasede0
- Qualifier
- 7 and14 daie0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rice dry weight was also increased when SUTN9‐2 was inoculated with NH4NO3 at 7 and14 dai”
Claim · model-written summary
IAA and ACC deaminase quantities were inconsistent with nit and acdS expression.
- Taxon
- riceOryza sativat0
- Gene
- nite0
- Outcome
- quantitative analysis of IAA and ACC deaminasee0
- Qualifier
- inconsistent with the expressione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results of quantitative analysis of IAA and ACC deaminase were inconsistent with the expression of genes involved in IAA (nit) and ACC deaminase (acdS) productions”
t0“rice”
Claim · model-written summary
Nitrogen fixation genes nifH and nifV of SUTN9-2 were induced in rice tissues.
- Taxon
- riceOryza sativae0
- Organ / stage
- tissuese0
- Interactor
- SUTN9‐2e0symbiont
- Gene
- nifH and nifVe0
- Outcome
- expression of genes involved in nitrogen fixatione0
- Direction
- inducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the expression of genes involved in nitrogen fixation (nifH and nifV) of SUTN9‐2 was also induced in rice tissues”
Claim · model-written summary
The authors suggest rice growth promotion may be supported by NH4NO3 together with SUTN9-2 nitrogen fixation.
- Taxon
- riceOryza sativae0
- Interactor
- SUTN9‐2e0symbiont
- Outcome
- rice growth promotione0
- Qualifier
- NH4NO3 together with nitrogen fixation by SUTN9‐2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice growth promotion may be supported by NH4NO3 together with nitrogen fixation by SUTN9‐2”
Claim · model-written summary
The authors suggest endophytic SUTN9-2 could be used to promote rice seedling growth in rice intensification systems.
- Taxon
- riceOryza sativat0
- Interactor
- SUTN9‐2e1symbiont
- Outcome
- rice seedling growth promoter in the system of rice intensificatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the potential to be used as rice seedling growth promoter in the system of rice intensification”
t0“rice”
e1“endophytic SUTN9‐2”
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See all 399 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.