Abstract
Experiments were undertaken in order to establish the influence of copper on the growth and yield of plants. Sunflower (Helianthus annuus L.) was grown in pots with peat enriched with mineral elements with the excluding of Cu. Copper was applied immediately after plant germination in doses of 0, 5 and 125 mg Cu per pot. In the form of CuSO4. During the vegetation period the following determinations were made: (a) dynamics of the increase of plant dry matter and of the assimilative surface, (b) chlorophyll content, (c) nitrate reductase activity and (d) intensity of photosynthesis and photosynthetic activity. The results indicate that copper deficit restricts the process of photosynthesis and the dynamics of dry mass increment. Differences in copper dosage did not have an immediate influence on the chlorophyll content and nitrate reductase activity, only rather an intermediate effect through the influence on the process of ageing.
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Claims 3
Claim · model-written summary
Copper deficit restricted sunflower photosynthesis and dry mass increment.
- Taxon
- Helianthus annuus L.
Helianthus annuust0 - Treatment
- copper deficite0
- Outcome
- process of photosynthesis and the dynamics of dry mass incremente0
- Direction
- restrictse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results indicate that copper deficit restricts the process of photosynthesis and the dynamics of dry mass increment.”
t0“sunflower (Helianthus annuus L.)”
Claim · model-written summary
Copper dosage did not immediately influence chlorophyll content or nitrate reductase activity in sunflower.
- Taxon
- Helianthus annuus L.Helianthus annuust0
- Treatment
- copper dosagee0
- Outcome
- chlorophyll content and nitrate reductase activitye0
- Direction
- did not have an immediate influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in copper dosage did not have an immediate influence on the chlorophyll content and nitrate reductase activity, only rather an intermediate effect through the influence on the process of ageing.”
t0“sunflower (Helianthus annuus L.)”
Claim · model-written summary
Copper dosage indirectly affected sunflower chlorophyll content and nitrate reductase activity through ageing.
- Taxon
- Helianthus annuus L.Helianthus annuust0
- Treatment
- copper dosagee0
- Outcome
- chlorophyll content and nitrate reductase activitye0
- Qualifier
- through the influence on the process of ageinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences in copper dosage did not have an immediate influence on the chlorophyll content and nitrate reductase activity, only rather an intermediate effect through the influence on the process of ageing.”
t0“sunflower (Helianthus annuus L.)”
The same questions in other papers
copper atom · physiology: pigments · Helianthus annuus (common sunflower)Results differ
3 papers in the same direction as this paper
- negative
- negative
- negative
copper atom · physiology: photosynthesis · Helianthus annuus (common sunflower)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- negative
- positive
- positive
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.