Abstract
An elevated growth temperature often inhibits plant defense responses and renders plants more susceptible to pathogens. However, the molecular mechanisms underlying this modulation are unknown. To genetically dissect this regulation, we isolated mutants that retain disease resistance at a higher growth temperature in Arabidopsis. One such heat-stable mutant results from a point mutation in SNC1, a NB-LRR encoding gene similar to disease resistance (R) genes. Similar mutations introduced into a tobacco R gene, N, confer defense responses at elevated temperature. Thus R genes or R-like genes involved in recognition of pathogen effectors are likely the causal temperature-sensitive component in defense responses. This is further supported by snc1 intragenic suppressors that regained temperature sensitivity in defense responses. In addition, the SNC1 and N proteins had a reduction of nuclear accumulation at elevated temperature, which likely contributes to the inhibition of defense responses. These findings identify a plant temperature sensitive component in disease resistance and provide a potential means to generate plants adapting to a broader temperature range.
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Claims 6
Claim · model-written summary
A heat-stable Arabidopsis mutant that retains disease resistance at higher growth temperature results from a point mutation in SNC1, an NB-LRR gene similar to R genes.
- Taxon
- Arabidopsis
Arabidopsise1 - Gene
- SNC1e0
- Outcome
- heat-stable mutant results from a point mutatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One such heat-stable mutant results from a point mutation in SNC1, a NB-LRR encoding gene similar to disease resistance (R) genes”
e1“isolated mutants that retain disease resistance at a higher growth temperature in Arabidopsis”
Claim · model-written summary
Similar mutations introduced into the tobacco R gene N conferred defense responses at elevated temperature.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- Similar mutations introduced into a tobacco R gene, Ne0
- Gene
- Ne0
- Outcome
- defense responsese0
- Qualifier
- elevated temperaturee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar mutations introduced into a tobacco R gene, N, confer defense responses at elevated temperature”
Claim · model-written summary
The authors conclude that R genes or R-like genes involved in recognition of pathogen effectors are likely the causal temperature-sensitive component in defense responses.
Not reportedTaxon
Verbatim
e0“R genes or R-like genes involved in recognition of pathogen effectors are likely the causal temperature-sensitive component in defense responses”
Claim · model-written summary
snc1 intragenic suppressors regained temperature sensitivity in defense responses.
Not reportedTaxon
Verbatim
e0“snc1 intragenic suppressors that regained temperature sensitivity in defense responses”
Claim · model-written summary
The SNC1 and N proteins showed reduced nuclear accumulation at elevated temperature.
- Treatment
- elevated temperaturee0
- Gene
- SNC1 and N proteinse0
- Outcome
- nuclear accumulatione0
- Direction
- reductione0
Not reportedTaxonComparator
Verbatim
e0“the SNC1 and N proteins had a reduction of nuclear accumulation at elevated temperature”
Claim · model-written summary
The authors suggest that reduced nuclear accumulation of SNC1 and N at elevated temperature likely contributes to the inhibition of defense responses.
- Treatment
- elevated temperaturee0
- Outcome
- inhibition of defense responsese0
- Qualifier
- reduction of nuclear accumulatione0
Not reportedTaxon
Verbatim
e0“reduction of nuclear accumulation at elevated temperature, which likely contributes to the inhibition of defense responses”
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