Abstract
The Mg 2+ ‐ and Ca 2+ ‐stimulated ATPase activities of the microsomal fractions of the roots of four inbred lines of Plantago major L. were followed at two levels of mineral nutrition. In addition the response of a transfer of plants from one condition to the other was studied. Kinetic properties of the ATPases (K m and V max ) were calculated and used to differentiate between genetic differences among the inbred lines and the plasticity within each inbred line. The V max values of the ATPase activity differed significantly between the lines and were directly related to seed number per capsule (low V max → 11 seeds per capsule, high V max → 33 seeds per capsule). In addition, the V max values of the ATPase acitivty may be related to ecological strategy. Plasticity of enzyme activity is expressed in differences in the V max values of the ATPase activity, as a response to nutritional level or changes of the strength of the nutrient solution. Differences in this plasticity in the four selected lines and in rapidity of response to a change in mineral nutrition were directly related to the ecological strategy. These results are discussed in relation to the strategy of the genotypes for survival in the field. The presence of plasticity in line 4 (ssp. pleiospema ) makes this genotype behave like an annual plant, following a ruderal strategy. The absence of plasticity in line 1 (ssp. major ) fits a more competitive strategy.
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Claims 7
Claim · model-written summary
Root V max values of the ATPase activity differ significantly among four Plantago major inbred lines
- Taxon
- Plantago major
Plantago majort0 - Material
- four inbred linese0
- Organ / stage
- rootse0
- Outcome
- V max values of the ATPase activitye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genetic differentiation in Plantago major”
e1“The V max values of the ATPase activity differed significantly between the lines and were directly related to seed number per capsule”
e0“microsomal fractions of the roots of four inbred lines of Plantago major L.”
Claim · model-written summary
Root ATPase V max values are directly related to seed number per capsule in Plantago major lines
- Taxon
- Plantago majorPlantago majort0
- Organ / stage
- rootse0
- Outcome
- seed number per capsulee2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genetic differentiation in Plantago major”
e2“were directly related to seed number per capsule (low V max → 11 seeds per capsule, high V max → 33 seeds per capsule)”
e0“microsomal fractions of the roots of four inbred lines of Plantago major L.”
Claim · model-written summary
Root ATPase V max values may be related to the ecological strategy of Plantago major
- Taxon
- Plantago majorPlantago majort0
- Outcome
- V max values of the ATPase acitivtye3
- Qualifier
- ecological strategye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genetic differentiation in Plantago major”
e3“the V max values of the ATPase acitivty may be related to ecological strategy”
Claim · model-written summary
Plasticity of root ATPase V max values is a response to nutritional level
- Taxon
- Plantago majorPlantago majort0
- Treatment
- nutritional levele4
- Outcome
- differences in the V max values of the ATPase activitye4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genetic differentiation in Plantago major”
e4“Plasticity of enzyme activity is expressed in differences in the V max values of the ATPase activity, as a response to nutritional level or changes of the strength of the nutrient solution”
Claim · model-written summary
Plasticity and rapidity of response to a change in mineral nutrition are related to the ecological strategy of the four lines
- Taxon
- Plantago majorPlantago majort0
- Treatment
- a change in mineral nutritione5
- Outcome
- rapidity of response to a change in mineral nutritione5
- Qualifier
- ecological strategye5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genetic differentiation in Plantago major”
e5“Differences in this plasticity in the four selected lines and in rapidity of response to a change in mineral nutrition were directly related to the ecological strategy”
Claim · model-written summary
Line 4 behaves like an annual plant with a ruderal strategy because of its plasticity
- Taxon
- Plantago majorPlantago majort0
- Material
- line 4e6
- Outcome
- behave like an annual plante6
- Qualifier
- following a ruderal strategye6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genetic differentiation in Plantago major”
e6“The presence of plasticity in line 4 (ssp. pleiospema ) makes this genotype behave like an annual plant, following a ruderal strategy”
Claim · model-written summary
Line 1, lacking plasticity, fits a more competitive strategy
- Taxon
- Plantago majorPlantago majort0
- Material
- line 1e7
- Outcome
- absence of plasticitye7
- Qualifier
- fits a more competitive strategye7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Genetic differentiation in Plantago major”
e7“The absence of plasticity in line 1 (ssp. major ) fits a more competitive strategy”