Abstract
The aim of this research was to screen plant growth biostimulant properties of supercritical CO2 macroalgal extracts. To this end secondary metabolites were isolated from the biomass of marine macroalgae from the Baltic Sea (species of Polysiphonia, Ulva and Cladophora). Chemical characteristics of the algal extracts were determined by inductively coupled plasma atomic emission spectroscopy for inorganic constituents and high-performance liquid chromatography and spectrophotometry for organic constituents. Inorganic (macro- and microelements) and organic (plant hormones: auxins and cytokinins; polyphenols) compounds were detected in the extract. Algal extracts were tested primarily on garden cress (Lepidium sativum L.; Brassicaceae) and wheat (Triticum aestivum L.; Poaceae). The extracts enhanced chlorophyll and carotenoid content in plant shoots, as well as root thickness and above-ground biomass. The most effective method of application of the extract was by foliar feed on cress and seed maceration for wheat. Algal extracts obtained by supercritical fluid extraction (SFE) were found to be a novel natural source of compounds, stimulating growth of cultivated plants. However, field trials will be required to show that the extracts can act as plant biopesticides and growth biostimulants.
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Claims 4
Claim · model-written summary
Macroalgal extracts increased chlorophyll and carotenoid content in plant shoots.
- Taxon
- garden cresse0
- Organ / stage
- plant shootse0
- Treatment
- Algal extractse0
- Outcome
- chlorophyll and carotenoid contente0
- Direction
- enhancede0
Not reportedComparator
Verbatim
e0“Algal extracts were tested primarily on garden cress (Lepidium sativum L.; Brassicaceae) and wheat (Triticum aestivum L.; Poaceae). The extracts enhanced chlorophyll and carotenoid content in plant shoots”
Claim · model-written summary
Macroalgal extracts increased root thickness and above-ground biomass.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Algal extractse0
- Outcome
- root thickness and above-ground biomasse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Algal extracts were tested primarily on garden cress (Lepidium sativum L.; Brassicaceae) and wheat (Triticum aestivum L.; Poaceae). The extracts enhanced chlorophyll and carotenoid content in plant shoots, as well as root thickness and above-ground biomass”
Claim · model-written summary
Foliar feeding was the most effective extract application method for cress.
Verbatim
e0“The most effective method of application of the extract was by foliar feed on cress”
Claim · model-written summary
Seed maceration was the most effective extract application method for wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- seed maceratione0
- Outcome
- most effective method of application of the extracte0
- Direction
- most effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most effective method of application of the extract was by foliar feed on cress and seed maceration for wheat”
The same questions in other papers
botanical · growth · Triticum aestivum (wheat)Positive and negative results
205 papers in the same direction as this paper · 228 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
431 papers more in this group
See all 435 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.