Abstract
Nitrogen is as a crucial macronutrient necessary for plant development. Legumes form well-known symbiotic relationships with nitrogen-fixing bacteria, but non-leguminous plants such as Arabidopsis thaliana also gain advantages from these associations without developing nodules. This study examines the relationship between A. thaliana and Sinorhizobium meliloti when conditions contain extremely low nitrogen levels. According to our findings, functional evidence consistent with biological nitrogen fixation from S. meliloti enhances plant growth and root system development. The plant growth response needs two essential regulatory genes, NSP1 and NLP9, which become active exclusively in nitrogen-deficient conditions. Microscopy showed bacterial colonization on the root epidermis, and subsequent analysis identified NSP1 and NLP9 as mediators of plant signaling, which modulate the host program to allow S. meliloti's nitrogenase activity. NSP1 controls the induction of NLP9, indicating a conserved signaling pathway resembling that found in legumes. The study discovered a non-canonical interaction beyond nodules that regulates bacterial nitrogen fixation functionality and improves A. thaliana survival during nutrient scarcity. The research expands our comprehension of how plants interact with nitrogen-fixing bacteria and indicates conserved molecular systems that allow non-leguminous plants to form advantageous relationships under severe nitrogen scarcity.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Evidence consistent with nitrogen fixation by S. meliloti was associated with enhanced plant growth and root development.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Interactor
- S. meliloti
Sinorhizobium melilotie0symbiont - Outcome
- plant growth and root system developmente0
- Direction
- enhancese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“functional evidence consistent with biological nitrogen fixation from S. meliloti enhances plant growth and root system development”
t0“Arabidopsis thaliana”
Claim · model-written summary
NSP1 and NLP9 were required for the growth response and active only under nitrogen deficiency.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- NSP1 and NLP9e0
- Outcome
- plant growth responsee0
- Qualifier
- nitrogen-deficient conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plant growth response needs two essential regulatory genes, NSP1 and NLP9, which become active exclusively in nitrogen-deficient conditions”
t0“Arabidopsis thaliana”
Claim · model-written summary
Microscopy showed bacterial colonization on the root epidermis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Organ / stage
- root epidermise0
- Interactor
- Sinorhizobium melilotiSinorhizobium melilotit0symbiont
- Outcome
- bacterial colonization on the root epidermise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microscopy showed bacterial colonization on the root epidermis”
t0“Arabidopsis thaliana and Sinorhizobium meliloti”
Claim · model-written summary
NSP1 and NLP9 mediated signaling that allowed S. meliloti nitrogenase activity.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Interactor
- S. melilotiSinorhizobium melilotie0symbiont
- Gene
- NSP1 and NLP9e0
- Outcome
- S. meliloti's nitrogenase activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NSP1 and NLP9 as mediators of plant signaling, which modulate the host program to allow S. meliloti's nitrogenase activity”
t0“Arabidopsis thaliana”
Claim · model-written summary
NSP1 controls induction of NLP9.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- NSP1e0
- Outcome
- induction of NLP9e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NSP1 controls the induction of NLP9”
t0“Arabidopsis thaliana”
Claim · model-written summary
The non-nodular interaction improved A. thaliana survival during nutrient scarcity.
- Taxon
- A. thalianaArabidopsis thalianae0
- Interactor
- Sinorhizobium melilotiSinorhizobium melilotit0symbiont
- Outcome
- A. thaliana survivale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a non-canonical interaction beyond nodules that regulates bacterial nitrogen fixation functionality and improves A. thaliana survival during nutrient scarcity”
t0“Arabidopsis thaliana and Sinorhizobium meliloti”