Claim · model-written summary
A-pao tobacco plants showed less programmed cell death than wild-type plants under salt stress.
- Taxon
- tobacco
Nicotiana tabacume0 - Material
- A-pao plantse1
- Treatment
- salt stresse2
- Outcome
- programmed cell deathe1
- Direction
- lesse1
- Comparator
- wild-type plantse1
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we developed a series of tobacco (Nicotiana tabacum cv Xanthi) transgenic plants overexpressing or downregulating apoplastic polyamine oxidase (PAO; S-pao and A-pao plants, respectively) or downregulating S-adenosyl-l-methionine decarboxylase (samdc plants)”
e1“A-pao plants accumulated less H2O2 and exhibited less programmed cell death (PCD) than did wild-type plants, in contrast with S-pao and samdc downregulating plants”
e2“Upon salt stress, plants secreted spermidine (Spd) into the apoplast, where it was oxidized by the apoplastic PAO, generating H2O2”
Title
Panagiotis N. Moschou; Konstantinos A. Paschalidis; Ioannis D. Delis; et al. The Plant Cell 2008. doi:10.1105/tpc.108.059733
Other claims from this paper (9)
- Intervention effect A-pao tobacco plants accumulated less H2O2 than wild-type plants under salt stress.
- Intervention effect S-pao tobacco plants had higher H2O2 levels under salt stress.
- Intervention effect S-pao tobacco plants failed to accumulate stress-responsive mRNAs under salt stress.
- Intervention effect Stress-responsive genes were efficiently induced in wild-type and A-pao plants, at a lower rate in A-pao plants.
- Intervention effect Decreasing intracellular polyamines in samdc downregulating plants enhanced salinity-induced PCD.
- Observation Tobacco plants secreted spermidine into the apoplast under salt stress.
- Mechanism Apoplastic spermidine oxidized by the apoplastic PAO generates H2O2.
- Association Induction of stress-responsive genes or PCD depended on the level of spermidine-derived apoplastic H2O2.
- Mechanism Accumulated H2O2 induces tolerance responses or PCD, depending also on intracellular polyamine levels.