Abstract
Influence of the amount of sulfur supplied on the soluble leaf protein, the synthesis and the specific activity of some enzymes of young sunflower plants The influence of a sulfur supplement on the pattern of leaf proteins, soluble in 0.1 M phosphate buffer, pH 7.5, was studied in experiments with young sunflower plants. The leaves were harvested after growing periods of 14 and 21 days, respectively. In addition, the electrophoretic distribution of isoenzymes of some enzyme systems and their specific activities have been analyzed. 1. Plant fresh weight was not affected by the level of sulfur supply, although symptoms of S‐deficiency were observed in the low S‐treatment. 2. In contrast to this finding, a clear effect of S‐deficiency on the electrophoretic patterns of the leaf proteins was detected. This was specially the case in plants. grown for three weeks at a low sulfur level. Increased contents of low molecular protein fractions were found, whereas the relative amounts of high molecular proteins were reduced. 3. In plants, which were kept S‐deficient, the number of isoenzyme components was lower in comparison to plants, which were adequately supplied with sulfur. The isoenzymes of malate dehydrogenase and acid phosphatase, however, were synthesized to about the same degree in both S‐treatments. 4. The specific activities of most of the enzymes studied in these investigations were lower in the plants, grown at S‐deficiency in comparison with the control. These findings were particularly evident after a growth period of 3 weeks. The specific activities of glutaminate dehydrogenase, succinate dehydrogenase and a‐ketoglutarate dehydrogenase were not significantly influenced by the level of S‐supply. The specific activities of acid phosphatase and malate dehydrogenase were relatively high even in those plants, which were treated with low amounts of sulfur.
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Claims 10
Claim · model-written summary
Plant fresh weight was unaffected by sulfur supply level.
- Taxon
- sunflower
Helianthus annuuse1 - Treatment
- level of sulfur supplye0
- Outcome
- Plant fresh weighte0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant fresh weight was not affected by the level of sulfur supply”
e1“with young sunflower plants. The leaves”
Claim · model-written summary
Low sulfur caused visible sulfur-deficiency symptoms.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- low S‐treatmente0
- Outcome
- symptoms of S‐deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“symptoms of S‐deficiency were observed in the low S‐treatment.”
e1“with young sunflower plants. The leaves”
Claim · model-written summary
Sulfur deficiency changed electrophoretic leaf protein patterns, especially after three weeks.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- S‐deficiencye0
- Outcome
- electrophoretic patterns of the leaf proteinse0
- Qualifier
- grown for three weekse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a clear effect of S‐deficiency on the electrophoretic patterns of the leaf proteins was detected. This was specially the case in plants. grown for three weeks at a low sulfur level.”
e1“with young sunflower plants. The leaves”
Claim · model-written summary
Low molecular weight leaf protein fractions increased under sulfur deficiency.
- Taxon
- sunflowerHelianthus annuuse2
- Treatment
- S‐deficiencye1
- Outcome
- low molecular protein fractionse0
- Direction
- Increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased contents of low molecular protein fractions were found”
e1“S‐deficiency on the electrophoretic patterns of the leaf proteins”
e2“with young sunflower plants. The leaves”
Claim · model-written summary
The relative amount of high molecular weight leaf proteins decreased under sulfur deficiency.
- Taxon
- sunflowerHelianthus annuuse2
- Treatment
- S‐deficiencye1
- Outcome
- high molecular proteinse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the relative amounts of high molecular proteins were reduced.”
e1“S‐deficiency on the electrophoretic patterns of the leaf proteins”
e2“with young sunflower plants. The leaves”
Claim · model-written summary
Sulfur-deficient plants had fewer isoenzyme components than sulfur-adequate plants.
- Taxon
- sunflowerHelianthus annuuse2
- Treatment
- S‐deficiente1
- Outcome
- number of isoenzyme componentse0
- Direction
- lowere0
- Comparator
- plants, which were adequately supplied with sulfure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of isoenzyme components was lower in comparison to plants, which were adequately supplied with sulfur.”
e1“In plants, which were kept S‐deficient”
e2“with young sunflower plants. The leaves”
Claim · model-written summary
Malate dehydrogenase and acid phosphatase isoenzymes were synthesized to similar degrees at both sulfur levels.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- S‐treatmentse0
- Outcome
- isoenzymes of malate dehydrogenase and acid phosphatasee0
- Direction
- about the same degreee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isoenzymes of malate dehydrogenase and acid phosphatase, however, were synthesized to about the same degree in both S‐treatments.”
e1“with young sunflower plants. The leaves”
Claim · model-written summary
Most studied enzymes had lower specific activity under sulfur deficiency, especially after three weeks.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- S‐deficiencye0
- Outcome
- specific activities of most of the enzymese0
- Direction
- lowere0
- Qualifier
- after a growth period of 3 weekse0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The specific activities of most of the enzymes studied in these investigations were lower in the plants, grown at S‐deficiency in comparison with the control. These findings were particularly evident after a growth period of 3 weeks.”
e1“with young sunflower plants. The leaves”
Claim · model-written summary
Glutaminate dehydrogenase, succinate dehydrogenase, and a-ketoglutarate dehydrogenase activities were not significantly affected by sulfur supply.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- level of S‐supplye0
- Outcome
- specific activities of glutaminate dehydrogenase, succinate dehydrogenase and a‐ketoglutarate dehydrogenasee0
- Direction
- not significantly influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The specific activities of glutaminate dehydrogenase, succinate dehydrogenase and a‐ketoglutarate dehydrogenase were not significantly influenced by the level of S‐supply.”
e1“with young sunflower plants. The leaves”
Claim · model-written summary
Acid phosphatase and malate dehydrogenase specific activities remained relatively high at low sulfur supply.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- low amounts of sulfure0
- Outcome
- specific activities of acid phosphatase and malate dehydrogenasee0
- Direction
- relatively highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The specific activities of acid phosphatase and malate dehydrogenase were relatively high even in those plants, which were treated with low amounts of sulfur.”
e1“with young sunflower plants. The leaves”
The same questions in other papers
sulfur atom · growth · Helianthus annuus (common sunflower)Positive and negative results
21 in the opposite direction
- positive
- positive
- positive
18 papers more in this group
See all 22 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.