Abstract
Potato (Solanum tuberosum L.) tubers are susceptible to infection by Erwinia carotovora, causal agent of bacterial soft rot, when wounded and subjected to wet, hypoxic environments. The expression of two putative plant defense genes, extensin and phenylalanine ammonia-lyase (PAL), was examined by monitoring their respective mRNA levels and cell wall hydroxyproline levels in tuber tissues under various conditions leading to susceptibility or resistance and after inoculation with E. carotovora in order to assess the possible roles of these genes and their products in this plant-pathogen interaction. Extensin and PAL mRNA levels as well as cell wall hydroxyproline levels accumulated markedly in response to wounding and subsequent aerobic incubation. Extensin and PAL mRNA levels as well as cell wall hydroxyproline levels decreased in response to wounding and subsequent anaerobic incubation; these changes were correlated with high susceptibility of tuber tissue to E. carotovora infection. Inoculation of wound sites with E. carotovora caused some additional accumulation of the wound-regulated extensin and PAL mRNAs under certain aerobic conditions, but never under anaerobic conditions.
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Claims 5
Claim · model-written summary
Wounding followed by aerobic incubation markedly increased extensin and PAL mRNA and cell wall hydroxyproline.
- Taxon
- Potato (Solanum tuberosum L.)
Solanum tuberosumt0 - Organ / stage
- tuberse2
- Treatment
- wounding and subsequent aerobic incubatione0
- Gene
- Extensin and PALe0
- Outcome
- mRNA levels as well as cell wall hydroxyproline levelse0
- Direction
- accumulated markedlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extensin and PAL mRNA levels as well as cell wall hydroxyproline levels accumulated markedly in response to wounding and subsequent aerobic incubation.”
t0“Potato (Solanum tuberosum L.)”
e2“Potato (Solanum tuberosum L.) tubers are susceptible to infection by Erwinia carotovora”
Claim · model-written summary
Wounding followed by anaerobic incubation decreased extensin and PAL mRNA and cell wall hydroxyproline.
- Taxon
- Potato (Solanum tuberosum L.)Solanum tuberosumt0
- Treatment
- wounding and subsequent anaerobic incubatione0
- Gene
- Extensin and PALe0
- Outcome
- mRNA levels as well as cell wall hydroxyproline levelse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extensin and PAL mRNA levels as well as cell wall hydroxyproline levels decreased in response to wounding and subsequent anaerobic incubation”
t0“Potato (Solanum tuberosum L.)”
Claim · model-written summary
The anaerobic decreases correlated with high susceptibility to E. carotovora.
- Taxon
- Potato (Solanum tuberosum L.)Solanum tuberosumt0
- Organ / stage
- tuber tissuee0
- Interactor
- E. carotovora
Pectobacterium carotovorume0pathogen - Outcome
- high susceptibility of tuber tissue to E. carotovora infectione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these changes were correlated with high susceptibility of tuber tissue to E. carotovora infection.”
t0“Potato (Solanum tuberosum L.)”
Claim · model-written summary
Inoculation with E. carotovora further increased wound-regulated extensin and PAL mRNAs under some aerobic conditions.
- Taxon
- Potato (Solanum tuberosum L.)Solanum tuberosumt0
- Treatment
- Inoculation of wound sites with E. carotovorae0
- Interactor
- E. carotovoraPectobacterium carotovorume0pathogen
- Gene
- extensin and PALe0
- Outcome
- wound-regulated extensin and PAL mRNAse0
- Direction
- additional accumulatione0
- Qualifier
- under certain aerobic conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of wound sites with E. carotovora caused some additional accumulation of the wound-regulated extensin and PAL mRNAs under certain aerobic conditions”
t0“Potato (Solanum tuberosum L.)”
Claim · model-written summary
E. carotovora inoculation never caused that extra mRNA accumulation under anaerobic conditions.
- Taxon
- Potato (Solanum tuberosum L.)Solanum tuberosumt0
- Treatment
- Inoculation of wound sites with E. carotovorae0
- Interactor
- E. carotovoraPectobacterium carotovorume0pathogen
- Outcome
- extensin and PAL mRNAse0
- Qualifier
- under anaerobic conditionse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of wound sites with E. carotovora caused some additional accumulation of the wound-regulated extensin and PAL mRNAs under certain aerobic conditions, but never under anaerobic conditions.”
t0“Potato (Solanum tuberosum L.)”
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