Abstract
With a view to assess the effectiveness of free proline accumulation in leaves as a criterion of selection for salinity resistant plants, a number of varieties of three different crops, barley (Hordeum vulgare), pearlmillet (Rennisetum typhoides) and chickpea (Cicer arietimm) were evaluated for yieldand salt resistance at varying or standardised levels of soil salinity in 90-cm deep microplots, which simulate a field profile reasonably well. When only 2–3 varieties from resistant, semi-tolerant ad sensitive classes within each crop were considered, it appeared that salt resistance might insomecasesbe positively related to free proline accumulation and in other cases, negatively correlated. If data on all the varieties within a crop were taken into account, any such correlation vanished. But with regard to pearlmilet hybrids (i.e. excluding synthetic lines) a significant negative correlation was detected between free proline accumulation and yield level at a given salinity level. Free proline in leaf was, even in this case, not related to salinity resistance as measured by relative reduction of genotypes dues to salinity stress. The conclusion is that salinity resistance was a complex trait, and generalisation over different varieties of a crop might not be possible.
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Claims 4
Claim · model-written summary
Salt resistance was positively related to free proline accumulation in some varieties and negatively correlated in others.
- Taxon
- Barley, Pearlmillet and Chickpea
Cicer arietinum.jpg?width=60)
Hordeum vulgare
Cenchrus americanust0 - Compound
- free prolinee2
- Outcome
- salt resistancee2
- Setting
- 90-cm deep microplotse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Free Proline in Barley, Pearlmillet and Chickpea Grown under Soil Salinity Stress”
e1“evaluated for yieldand salt resistance at varying or standardised levels of soil salinity in 90-cm deep microplots”
e2“salt resistance might insomecasesbe positively related to free proline accumulation and in other cases, negatively correlated”
Claim · model-written summary
When data on all varieties within a crop were pooled, the correlation between free proline and salt resistance vanished.
- Taxon
- Barley, Pearlmillet and ChickpeaCicer arietinumHordeum vulgareCenchrus americanust0
- Material
- all the varieties within a crope3
- Compound
- free prolinee2
- Outcome
- any such correlatione3
- Direction
- vanishede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Free Proline in Barley, Pearlmillet and Chickpea Grown under Soil Salinity Stress”
e2“salt resistance might insomecasesbe positively related to free proline accumulation and in other cases, negatively correlated”
e3“If data on all the varieties within a crop were taken into account, any such correlation vanished”
Claim · model-written summary
In pearlmillet hybrids, free proline accumulation was significantly negatively correlated with yield level at a given salinity level.
- Taxon
- PearlmilletCenchrus americanust0
- Material
- pearlmilet hybridse4
- Treatment
- a given salinity levele4
- Compound
- free prolinee4
- Outcome
- yield levele4
- Direction
- negative correlatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Free Proline in Barley, Pearlmillet and Chickpea Grown under Soil Salinity Stress”
e4“with regard to pearlmilet hybrids (i.e. excluding synthetic lines) a significant negative correlation was detected between free proline accumulation and yield level at a given salinity level”
Claim · model-written summary
Leaf free proline was not related to salinity resistance, measured as relative reduction of genotypes under salinity stress.
- Taxon
- PearlmilletCenchrus americanust0
- Treatment
- salinity stresse5
- Compound
- Free proline in leafe5
- Outcome
- salinity resistancee5
- Direction
- not relatede5
- Qualifier
- as measured by relative reduction of genotypese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Free Proline in Barley, Pearlmillet and Chickpea Grown under Soil Salinity Stress”
e5“Free proline in leaf was, even in this case, not related to salinity resistance as measured by relative reduction of genotypes dues to salinity stress”