Abstract
In nature, plants must respond to multiple stresses simultaneously, which likely demands cross-talk between stress-response pathways to minimize fitness costs. Here we provide genetic evidence that biotic and abiotic stress responses are differentially prioritized in Arabidopsis thaliana leaves of different ages to maintain growth and reproduction under combined biotic and abiotic stresses. Abiotic stresses, such as high salinity and drought, blunted immune responses in older rosette leaves through the phytohormone abscisic acid signaling, whereas this antagonistic effect was blocked in younger rosette leaves by PBS3 , a signaling component of the defense phytohormone salicylic acid. Plants lacking PBS3 exhibited enhanced abiotic stress tolerance at the cost of decreased fitness under combined biotic and abiotic stresses. Together with this role, PBS3 is also indispensable for the establishment of salt stress- and leaf age-dependent phyllosphere bacterial communities. Collectively, our work reveals a mechanism that balances trade-offs upon conflicting stresses at the organism level and identifies a genetic intersection among plant immunity, leaf microbiota, and abiotic stress tolerance.
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Claims 6
Claim · model-written summary
Arabidopsis thaliana leaves of different ages prioritized biotic and abiotic stress responses differently under combined stresses.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Organ / stage
- leaves of different agese0
- Outcome
- biotic and abiotic stress responsese0
- Qualifier
- combined biotic and abiotic stressese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biotic and abiotic stress responses are differentially prioritized in Arabidopsis thaliana leaves of different ages to maintain growth and reproduction under combined biotic and abiotic stresses.”
Claim · model-written summary
High salinity and drought blunted immune responses in older rosette leaves through abscisic acid signaling.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Organ / stage
- older rosette leavese0
- Treatment
- high salinity and droughte0
- Compound
- abscisic acide0
- Outcome
- immune responsese0
- Direction
- bluntede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abiotic stresses, such as high salinity and drought, blunted immune responses in older rosette leaves through the phytohormone abscisic acid signaling”
t0“Arabidopsis thaliana leaves of different ages”
Claim · model-written summary
PBS3 blocked this antagonism in younger rosette leaves.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Organ / stage
- younger rosette leavese0
- Gene
- PBS3e0
- Compound
- salicylic acide0
- Outcome
- this antagonistic effect was blockede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas this antagonistic effect was blocked in younger rosette leaves by PBS3 , a signaling component of the defense phytohormone salicylic acid”
e1“Arabidopsis thaliana leaves of different ages”
Claim · model-written summary
Plants lacking PBS3 had enhanced abiotic stress tolerance.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Gene
- PBS3e0
- Outcome
- abiotic stress tolerancee0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants lacking PBS3 exhibited enhanced abiotic stress tolerance at the cost of decreased fitness under combined biotic and abiotic stresses.”
e1“Arabidopsis thaliana leaves of different ages”
Claim · model-written summary
Plants lacking PBS3 had decreased fitness under combined biotic and abiotic stresses.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Gene
- PBS3e0
- Outcome
- fitnesse0
- Direction
- decreasede0
- Qualifier
- combined biotic and abiotic stressese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants lacking PBS3 exhibited enhanced abiotic stress tolerance at the cost of decreased fitness under combined biotic and abiotic stresses.”
e1“Arabidopsis thaliana leaves of different ages”
Claim · model-written summary
PBS3 was indispensable for salt stress- and leaf age-dependent phyllosphere bacterial communities.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Interactor
- phyllosphere bacterial communitiese0symbiont
- Gene
- PBS3e0
- Outcome
- establishment of salt stress- and leaf age-dependent phyllosphere bacterial communitiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBS3 is also indispensable for the establishment of salt stress- and leaf age-dependent phyllosphere bacterial communities.”
e1“Arabidopsis thaliana leaves of different ages”
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