Abstract
This study reported the results of an experimental investigation regarding the chlorophyll contents in sunflower seedlings supplied with low concentrations of magnetic nanoparticles. Iron and iron-cobalt oxides were prepared in the form of colloidal nanoparticles for the administration in the culture medium of young plant seedlings during their very early ontogenetic stages - as possible basis of new biotechnological tool in plant growth controlling. The changes in the contents of chlorophyll A, chlorophyll B and carotene like pigments were evidenced by spectral measurements. Magnetite nanoparticles influenced negatively the photosynthetic pigment biosynthesis by diminishing chlorophyll content with up to 50% while slighter effect was evidenced in the case of cobalt ferrite nanoparticles that induced only up to 28% chlorophyll level decreasing. The influence upon photosynthetic system LHC II was revealed as consistent with the higher diminution of chlorophyll ratio in the case of cobalt ferrite supplied seedlings than for magnetite supplied ones sustaining the hypothesis of photosynthesis sensitivity to the presence of magnetic nanoparticles stress. Key words: Sunflower seedlings, photosynthetic pigments, nanosized metal oxides.
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Claims 4
Claim · model-written summary
Magnetite nanoparticles reduced chlorophyll content by up to 50%.
- Taxon
- Sunflower
Helianthus annuust0 - Treatment
- Magnetite nanoparticlese0
- Outcome
- chlorophyll contente0
- Direction
- diminishinge0
- Value
- up to 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower”
e0“Magnetite nanoparticles influenced negatively the photosynthetic pigment biosynthesis by diminishing chlorophyll content with up to 50%”
Claim · model-written summary
Cobalt ferrite nanoparticles decreased chlorophyll level by up to 28%.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- cobalt ferrite nanoparticlese0
- Outcome
- chlorophyll levele0
- Direction
- decreasinge0
- Value
- up to 28%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower”
e0“cobalt ferrite nanoparticles that induced only up to 28% chlorophyll level decreasing”
Claim · model-written summary
The chlorophyll ratio declined more with cobalt ferrite than magnetite supply.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- cobalt ferritee0
- Outcome
- chlorophyll ratioe0
- Direction
- higher diminutione0
- Comparator
- magnetitee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower”
e0“higher diminution of chlorophyll ratio in the case of cobalt ferrite supplied seedlings than for magnetite supplied ones”
Claim · model-written summary
The authors interpreted pigment changes as photosynthesis sensitivity to magnetic nanoparticle stress.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- magnetic nanoparticles stresse0
- Outcome
- photosynthesis sensitivitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower”
e0“sustaining the hypothesis of photosynthesis sensitivity to the presence of magnetic nanoparticles stress”
The same questions in other papers
nanoparticle · physiology: pigments · Helianthus annuus (common sunflower)Positive and negative results
7 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.