Abstract
Puccinecia ciliata is a salt-tolerant, winter-growing grass. The responses of germination of P. ciliata to salinity and temperature were investigated. With a day/night temperature regime of 25/15¦C, the final germination percentage of P. ciliata in distilled water was 54%, and was not significantly affected by salinities up to 87 mol m NaCl (osmotic potential, =, -0.4 MPa), but decreased to 5.2% in 260 mol m-3 NaCl (=, -1.2 MPa). The n at which the final germination percentage was reduced by 5O0/n of that in distilled water was about -0.5 MPa, which was similar to that of Lolium perenne. However, for L. perenne, the final germination percentage decreased more rapidly with increasing salinity and from a higher value in distilled water (97%) compared with P. ciliata. Germination of P. ciliata was completely inhibited at constant 33¦C and was low (<20%) where day temperature was 30¦C and night temperature was greater than or equal to 17¦C. Maximum germination was observed where day and night temperatures were between 17 and 24¦C, but were not equal. The rate of germination decreased with increasing salinity and was maximal at temperatures between 17¦C and 24¦C. The reduction in the final germination percentage in NaCl solution was apparently an osmotic effect since the final germination percentage in iso-osmotic solutions of mannitol, polyethylene glycol, NaCl, KC1 and KNO3 were similar. P. ciliala and L. perenne were more salt sensitive during germination than during early seedling growth; for 35-day-old seedlings, shoot dry weight was reduced by 50% of that of the nonsaline treatment when irrigated with solution with = of -0.75 MPa for L. perenne and - 1.25 MPa for P. ciliala.
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Claims 14
Claim · model-written summary
P. ciliata germination in distilled water at 25/15¦C was 54%.
- Taxon
- P. ciliataPuccinellia ciliatae0
- Treatment
- 25/15¦Ce0
- Outcome
- final germination percentagee0
- Value
- 54%e0
Verbatim
e0“With a day/night temperature regime of 25/15¦C, the final germination percentage of P. ciliata in distilled water was 54%”
Claim · model-written summary
Salinity up to 87 mol m NaCl did not significantly alter P. ciliata germination.
- Taxon
- Puccinellia ciliataPuccinellia ciliatat0
- Treatment
- salinities up to 87 mol m NaCle0
- Outcome
- Puccinellia ciliatat0
- Direction
- not significantly affectede0
Not reportedComparator
Verbatim
e0“was not significantly affected by salinities up to 87 mol m NaCl (osmotic potential, =, -0.4 MPa)”
t0“Puccinellia ciliata”
Claim · model-written summary
P. ciliata final germination fell to 5.2% in 260 mol m-3 NaCl.
- Taxon
- Puccinellia ciliataPuccinellia ciliatat0
- Treatment
- 260 mol m-3 NaCle0
- Outcome
- Puccinellia ciliatat0
- Direction
- decreasede0
- Value
- 5.2%e0
Not reportedComparator
Verbatim
e0“decreased to 5.2% in 260 mol m-3 NaCl (=, -1.2 MPa)”
t0“Puccinellia ciliata”
Claim · model-written summary
The osmotic potential reducing final germination by half was about -0.5 MPa, similar to Lolium perenne.
Verbatim
e0“the final germination percentage was reduced by 5O0/n of that in distilled water was about -0.5 MPa, which was similar to that of Lolium perenne”
t0“Puccinellia ciliata”
Claim · model-written summary
Lolium perenne germination declined faster with salinity than P. ciliata and began at 97% in distilled water.
- Taxon
- L. perenne
Lolium perennee0 - Treatment
- increasing salinitye0
- Outcome
- final germination percentagee0
- Direction
- decreased more rapidlye0
- Value
- 97%e0
- Comparator
- P. ciliatae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for L. perenne, the final germination percentage decreased more rapidly with increasing salinity and from a higher value in distilled water (97%) compared with P. ciliata”
Claim · model-written summary
Constant 33¦C completely inhibited P. ciliata germination.
- Taxon
- P. ciliataPuccinellia ciliatae0
- Treatment
- constant 33¦Ce0
- Outcome
- Germinatione0
- Direction
- completely inhibitede0
Not reportedComparator
Verbatim
e0“Germination of P. ciliata was completely inhibited at constant 33¦C”
Claim · model-written summary
P. ciliata germination was below 20% with 30¦C days and nights at least 17¦C.
Verbatim
e0“was low (<20%) where day temperature was 30¦C and night temperature was greater than or equal to 17¦C”
t0“Puccinellia ciliata”
Claim · model-written summary
Maximum germination occurred at unequal day and night temperatures between 17 and 24¦C.
- Taxon
- Puccinellia ciliataPuccinellia ciliatat0
- Treatment
- day and night temperatures were between 17 and 24¦C, but were not equale0
- Outcome
- germinatione0
- Direction
- Maximume0
Verbatim
e0“Maximum germination was observed where day and night temperatures were between 17 and 24¦C, but were not equal”
t0“Puccinellia ciliata”
Claim · model-written summary
Germination rate decreased with increasing salinity.
- Taxon
- Puccinellia ciliataPuccinellia ciliatat0
- Treatment
- increasing salinitye0
- Outcome
- rate of germinatione0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“The rate of germination decreased with increasing salinity”
t0“Puccinellia ciliata”
Claim · model-written summary
Germination rate was maximal between 17¦C and 24¦C.
- Taxon
- Puccinellia ciliataPuccinellia ciliatat0
- Treatment
- temperatures between 17¦C and 24¦Ce0
- Outcome
- Puccinellia ciliatat0
- Direction
- maximale0
Verbatim
e0“was maximal at temperatures between 17¦C and 24¦C”
t0“Puccinellia ciliata”
Claim · model-written summary
Similar germination across iso-osmotic solutes supports an osmotic explanation for NaCl inhibition.
- Taxon
- Puccinellia ciliataPuccinellia ciliatat0
- Outcome
- reduction in the final germination percentagee0
- Qualifier
- osmotic effecte0
Verbatim
e0“The reduction in the final germination percentage in NaCl solution was apparently an osmotic effect since the final germination percentage in iso-osmotic solutions of mannitol, polyethylene glycol, NaCl, KC1 and KNO3 were similar”
t0“Puccinellia ciliata”
Claim · model-written summary
P. ciliata and L. perenne were more salt-sensitive in germination than early seedling growth.
Verbatim
e0“P. ciliala and L. perenne were more salt sensitive during germination than during early seedling growth”
Claim · model-written summary
At 35 days, L. perenne shoot dry weight fell 50% at -0.75 MPa irrigation.
- Taxon
- L. perenneLolium perennee0
- Organ / stage
- 35-day-old seedlingse0
- Treatment
- irrigated with solution with = of -0.75 MPae0
- Outcome
- shoot dry weighte0
- Direction
- reducede0
- Value
- 50%e0
- Comparator
- nonsaline treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for 35-day-old seedlings, shoot dry weight was reduced by 50% of that of the nonsaline treatment when irrigated with solution with = of -0.75 MPa for L. perenne”
Claim · model-written summary
At 35 days, P. ciliata shoot dry weight fell 50% at -1.25 MPa irrigation.
Verbatim
e0“for 35-day-old seedlings, shoot dry weight was reduced by 50% of that of the nonsaline treatment when irrigated with solution with = of -0.75 MPa for L. perenne and - 1.25 MPa for P. ciliala”
The same questions in other papers
salinity · growth · Puccinellia ciliataPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
irrigation · growth · Lolium perenne (perennial ryegrass)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
1 paper more in this group
See all 5 papers →salinity · growth · Lolium perenne (perennial ryegrass)Positive and negative results
15 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
13 papers more in this group
See all 17 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.