Abstract
Bacterial 1-aminocyclopropane-1-carboxylate (ACC) deaminase is a key factor for alleviating the plant ethylene biosynthesis, which is induced by stress. The ACC deaminase-improved strains of the rice endophytic Bradyrhizobium sp. SUTN9-2, SUTN9-2 (ACCDadap) and SUTN9-2:pMG103::acdRS, exhibit 1.4- and 8.9-fold higher ACC deaminase activity than the wild type, respectively (Sarapat S, Songwattana P, Longtonglang A, Umnajkitikorn K, Girdthai T, Tittabutr P, Boonkerd N, Teaumroong N. 2020. Effects of Increased 1-Aminocyclopropane-1-Carboxylate (ACC) Deaminase Activity in Bradyrhizobium sp. SUTN9-2 on Mung Bean Symbiosis under Water Deficit Conditions. Microbes Environ. 35). The effects of these on rice growth under water deficit conditions were evaluated. The bacterial inoculations reduced ethylene synthesis, leading to a reduction in membrane destruction and the chlorophyll content of rice. Furthermore, the bacterial inoculations improved the leaf relative water content, survival, recovery rates, and improved the crop yield in field conditions. Therefore, the water deficit tolerance of rice was improved by controlling ethylene biosynthesis by improving ACC deaminase activity with endophytic SUTN9-2. Moreover, the SUTN9-2 (ACCDadap) strain can be used as a bio-inoculant under field conditions to enhance rice growth, grain yield, and enhance drought tolerance.
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Claims 8
Claim · model-written summary
Inoculation with the ACC deaminase-improved Bradyrhizobium strains reduced ethylene synthesis in rice under water deficit.
- Taxon
- rice
Oryza sativat0 - Treatment
- bacterial inoculationse1
- Interactor
- Bradyrhizobium strain SUTN9-2t0symbiont
- Outcome
- ethylene synthesise1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice endophytic Bradyrhizobium strain SUTN9-2”
e1“The bacterial inoculations reduced ethylene synthesis, leading to a reduction in membrane destruction and the chlorophyll content of rice”
Claim · model-written summary
Bacterial inoculation reduced membrane destruction and the chlorophyll content of rice.
- Taxon
- riceOryza sativat0
- Treatment
- bacterial inoculationse1
- Interactor
- Bradyrhizobium strain SUTN9-2t0symbiont
- Outcome
- membrane destruction and the chlorophyll contente1
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice endophytic Bradyrhizobium strain SUTN9-2”
e1“The bacterial inoculations reduced ethylene synthesis, leading to a reduction in membrane destruction and the chlorophyll content of rice”
Claim · model-written summary
Bacterial inoculation improved leaf relative water content, survival and recovery rates of rice under water deficit.
- Taxon
- riceOryza sativat0
- Treatment
- bacterial inoculationse1
- Interactor
- Bradyrhizobium strain SUTN9-2t0symbiont
- Outcome
- leaf relative water content, survival, recovery ratese1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice endophytic Bradyrhizobium strain SUTN9-2”
e1“the bacterial inoculations improved the leaf relative water content, survival, recovery rates, and improved the crop yield in field conditions”
Claim · model-written summary
Bacterial inoculation improved rice crop yield in field conditions.
- Taxon
- riceOryza sativat0
- Treatment
- bacterial inoculationse1
- Interactor
- Bradyrhizobium strain SUTN9-2t0symbiont
- Outcome
- crop yielde1
- Direction
- improvede1
- Setting
- field conditionse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice endophytic Bradyrhizobium strain SUTN9-2”
e1“the bacterial inoculations improved the leaf relative water content, survival, recovery rates, and improved the crop yield in field conditions”
Claim · model-written summary
The authors conclude that water deficit tolerance of rice was improved by controlling ethylene biosynthesis through higher ACC deaminase activity of endophytic SUTN9-2.
- Taxon
- riceOryza sativae1
- Interactor
- SUTN9-2e1symbiont
- Gene
- ACC deaminasee1
- Outcome
- water deficit tolerancee1
- Qualifier
- controlling ethylene biosynthesis by improving ACC deaminase activitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the water deficit tolerance of rice was improved by controlling ethylene biosynthesis by improving ACC deaminase activity with endophytic SUTN9-2”
Claim · model-written summary
The SUTN9-2 (ACCDadap) strain can be used as a bio-inoculant under field conditions to enhance rice growth, grain yield and drought tolerance.
- Taxon
- riceOryza sativae1
- Treatment
- SUTN9-2 (ACCDadap)e1
- Interactor
- SUTN9-2 (ACCDadap)e1symbiont
- Outcome
- bio-inoculante1
- Setting
- field conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the SUTN9-2 (ACCDadap) strain can be used as a bio-inoculant under field conditions to enhance rice growth, grain yield, and enhance drought tolerance”
Claim · model-written summary
Previously reported: the ACC deaminase-improved strain SUTN9-2 (ACCDadap) showed 1.4-fold higher ACC deaminase activity than the wild type.
- Taxon
- Bradyrhizobium sp. SUTN9-2
Bradyrhizobium sp. SUTN9-2e1 - Material
- SUTN9-2 (ACCDadap)e1
- Outcome
- ACC deaminase activitye1
- Direction
- highere1
- Value
- 1.4-e1
- Comparator
- the wild typee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The ACC deaminase-improved strains of the rice endophytic Bradyrhizobium sp. SUTN9-2, SUTN9-2 (ACCDadap) and SUTN9-2:pMG103::acdRS, exhibit 1.4- and 8.9-fold higher ACC deaminase activity than the wild type, respectively”
Claim · model-written summary
Previously reported: the ACC deaminase-improved strain SUTN9-2:pMG103::acdRS showed 8.9-fold higher ACC deaminase activity than the wild type.
- Taxon
- Bradyrhizobium sp. SUTN9-2Bradyrhizobium sp. SUTN9-2e1
- Material
- SUTN9-2:pMG103::acdRSe1
- Outcome
- ACC deaminase activitye1
- Direction
- highere1
- Value
- 8.9-folde1
- Comparator
- the wild typee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The ACC deaminase-improved strains of the rice endophytic Bradyrhizobium sp. SUTN9-2, SUTN9-2 (ACCDadap) and SUTN9-2:pMG103::acdRS, exhibit 1.4- and 8.9-fold higher ACC deaminase activity than the wild type, respectively”
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