Abstract
Associations among chloroplast characteristics were investigated using divergent selections from Zea mays L.; narrow (NL) vs. wide (WL) leaves, two replicates low (LP) vs. high (HP) stalk volume (sixth leaf stage) and golden (g) vs. normal (G) isopopulations. Leaf width selections differed in chlorophyll contents but had similar in vitro rates of ferricyanide reduction and noncyclic photophosphorylation, chloroplast protein levels and rates of net CO 2 fixed per mg chlorophyll for three light intensities. The LP selections had inefficient photosynthetic systems relative to HP, while Golden had at least as efficient photosynthetic system as Normal. In contrast, LP selections had 13% and Golden 23% higher ferricyanide reduction and noncyclic photophosphorylation rates than HP and Normal, respectively. Information from in vitro measures was contradictory to that from other sources. Genetically controlled differences for chloroplast protein relative to chlorophyll level were found. Total chloroplast protein (TCP) and a fraction removed by NaOH (CPF) were both highly correlated with ferricyanide reduction rates. While TCP and CPF levels reflected seasonal effects, differences between genotypes for protein levels remained relatively consistent. TCP measure was proposed for population genetic studies to establish whether photochemical properties of chloroplasts have value as selection criteria.
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Claims 13
Claim · model-written summary
Narrow-leaf maize selections differed from wide-leaf selections in chlorophyll content.
Zea maysNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e1“Leaf width selections differed in chlorophyll contents but had similar in vitro rates of ferricyanide reduction and noncyclic photophosphorylation, chloroplast protein levels and rates of net CO 2 fixed per mg chlorophyll for three light intensities”
e2“narrow (NL) vs. wide (WL) leaves”
Claim · model-written summary
Narrow- and wide-leaf selections had similar in vitro rates of ferricyanide reduction and noncyclic photophosphorylation.
- Material
- narrow (NL)e2
- Outcome
- in vitro rates of ferricyanide reduction and noncyclic photophosphorylatione1
- Direction
- similare1
- Comparator
- wide (WL)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e1“Leaf width selections differed in chlorophyll contents but had similar in vitro rates of ferricyanide reduction and noncyclic photophosphorylation, chloroplast protein levels and rates of net CO 2 fixed per mg chlorophyll for three light intensities”
e2“narrow (NL) vs. wide (WL) leaves”
Claim · model-written summary
Narrow- and wide-leaf selections had similar chloroplast protein levels and net CO2 fixation per mg chlorophyll across three light intensities.
- Material
- narrow (NL)e2
- Outcome
- chloroplast protein levels and rates of net CO 2 fixed per mg chlorophylle1
- Direction
- similare1
- Qualifier
- for three light intensitiese1
- Comparator
- wide (WL)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e1“Leaf width selections differed in chlorophyll contents but had similar in vitro rates of ferricyanide reduction and noncyclic photophosphorylation, chloroplast protein levels and rates of net CO 2 fixed per mg chlorophyll for three light intensities”
e2“narrow (NL) vs. wide (WL) leaves”
Claim · model-written summary
The low-stalk-volume selections had inefficient photosynthetic systems relative to the high-stalk-volume selections.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e3“The LP selections had inefficient photosynthetic systems relative to HP, while Golden had at least as efficient photosynthetic system as Normal”
Claim · model-written summary
Golden had at least as efficient a photosynthetic system as Normal.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e3“The LP selections had inefficient photosynthetic systems relative to HP, while Golden had at least as efficient photosynthetic system as Normal”
Claim · model-written summary
Low-stalk-volume selections had 13% higher ferricyanide reduction and noncyclic photophosphorylation rates than high-stalk-volume selections.
- Material
- LP selectionse4
- Outcome
- ferricyanide reduction and noncyclic photophosphorylation ratese4
- Direction
- highere4
- Value
- 13%e4
- Comparator
- HPe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e4“In contrast, LP selections had 13% and Golden 23% higher ferricyanide reduction and noncyclic photophosphorylation rates than HP and Normal, respectively”
Claim · model-written summary
Golden had 23% higher ferricyanide reduction and noncyclic photophosphorylation rates than Normal.
- Material
- Goldene4
- Outcome
- ferricyanide reduction and noncyclic photophosphorylation ratese4
- Direction
- highere4
- Value
- 23%e4
- Comparator
- Normale4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e4“In contrast, LP selections had 13% and Golden 23% higher ferricyanide reduction and noncyclic photophosphorylation rates than HP and Normal, respectively”
Claim · model-written summary
Information from in vitro measures was contradictory to information from other sources.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e5“Information from in vitro measures was contradictory to that from other sources”
Claim · model-written summary
Genetically controlled differences in chloroplast protein relative to chlorophyll level were found.
- Outcome
- chloroplast protein relative to chlorophyll levele6
- Qualifier
- Genetically controlled differencese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e6“Genetically controlled differences for chloroplast protein relative to chlorophyll level were found”
Claim · model-written summary
Total chloroplast protein and the NaOH-removed fraction are highly correlated with ferricyanide reduction rates.
- Organ / stage
- Total chloroplast proteine7
- Outcome
- ferricyanide reduction ratese7
- Direction
- highly correlatede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e7“Total chloroplast protein (TCP) and a fraction removed by NaOH (CPF) were both highly correlated with ferricyanide reduction rates”
Claim · model-written summary
TCP and CPF levels reflected seasonal effects.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e0“While TCP and CPF levels reflected seasonal effects, differences between genotypes for protein levels remained relatively consistent”
Claim · model-written summary
Differences in protein levels between genotypes remained relatively consistent.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e0“While TCP and CPF levels reflected seasonal effects, differences between genotypes for protein levels remained relatively consistent”
Claim · model-written summary
The TCP measure is proposed for population genetic studies to test the value of chloroplast photochemical properties as selection criteria.
- Outcome
- population genetic studiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“from Zea mays L.”
e0“TCP measure was proposed for population genetic studies to establish whether photochemical properties of chloroplasts have value as selection criteria”