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Article
Open AccessStress-related physiological responses and ultrastructural changes in Hypoxis hemerocallidea leaves exposed to cadmium and aluminium
Hypoxis hemerocallidea is a medicinal plant containing hypoxoside (a pharmacologically active phytosterol diglucoside). This study evaluated the elemental composition in leaves of H. hemerocallidea treated with c...
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Article
Cytokinin-like activity of some species of Rhodophyta from tropical and subtropical waters
The use of seaweed extracts as biostimulants is increasing worldwide to improve agricultural production, since they are natural and environmentally friendly compounds. Seaweeds biosynthesize plant hormones, in...
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Article
Open AccessEndophyte Inoculation Enhances Growth, Secondary Metabolites and Biological Activity of Endostemon obtusifolius Grown Under Drought Stress
There is a need to cultivate medicinal plants to meet the growing demand. Their cultivation is hampered by extreme environmental conditions such as drought that affect plant growth and its pharmacological pote...
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Article
Cataloguing microalgae and Cyanobacteria strains from the Mosonmagyaróvár Algal Culture Collection with in vitro antagonistic activity against phytopathogenic fungi and oomycetes
Microalgae produce many secondary metabolites that are biologically active, including compounds that inhibit microbial growth. These could potentially function as biofungicides. The first selection criteria fo...
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Article
Effect of storage on plant biostimulant and bioactive properties of freeze-dried Chlorella vulgaris biomass
Microalgae are potential plant biostimulants and biocontrol agents. A major hurdle towards their commercialization is the production of large volumes of biomass at the correct time of year. Secondary metabolit...
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Article
Comparison of monocultures and a mixed culture of three Chlorellaceae strains to optimize biomass production and biochemical content in microalgae grown in a greenhouse
Light and temperature are important environmental conditions affecting microalgal growth in outdoor culture. It is essential to evaluate microalgae strains growing under outdoor conditions where they are subje...
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Article
Seaweed-Derived Biostimulant (Kelpak®) Influences Endogenous Cytokinins and Bioactive Compounds in Hydroponically Grown Eucomis autumnalis
The effect of a seaweed-derived biostimulant (Kelpak® at 1, 2.5 and 5 % dilution; v/v) on the growth, endogenous cytokinin (CK) and phytochemical content in Eucomis autumnalis (Mill.) Chitt. under hydroponic cond...
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Article
Changes in phytochemical content and pharmacological activities of three Chlorella strains grown in different nitrogen conditions
The phytochemical content and biological activity of three Chlorella strains cultured in low (35 mg L−1) or high (700 mg L−1) nitrogen (N) and harvested on days 5 and 10 were evaluated. High N resulted in a highe...
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Article
Cytokinin profiles in ex vitro acclimatized Eucomis autumnalis plants pre-treated with smoke-derived karrikinolide
The current evidence of regulatory effect of smoke–water (SW) and karrikinolide (KAR 1 ) on the concentrations of end...
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Article
Phenolic profiles, antioxidant capacity, and acetylcholinesterase inhibitory activity of eight South African seaweeds
In the search for new, safe, and natural sources as antioxidant and acetylcholinesterase (AChE) inhibitors, eight seaweeds were collected from the intertidal region in KwaZulu-Natal, South Africa and screened....
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Article
Eckol Improves Growth, Enzyme Activities, and Secondary Metabolite Content in Maize (Zea mays cv. Border King)
The effects of eckol, a phenolic compound isolated from the seaweed Ecklonia maxima, on the growth of Zea mays cv. Border King were examined. Kernels were soaked in eckol solution (10−6 M) for 18 h prior to plan...
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Article
Evidence of phytohormones and phenolic acids variability in garden-waste-derived vermicompost leachate, a well-known plant growth stimulant
Cytokinins, auxins, abscisic acid, gibberellins (GAs) and brassinosteroids (BRs) as well as the phenolic acid content in three batches of vermicompost leachate (VCL) were quantified using ultra high performan...
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Article
Eckol - a new plant growth stimulant from the brown seaweed Ecklonia maxima
The seaweed concentrate Kelpak® made from the brown kelp Ecklonia maxima is used worldwide as a biostimulant for a number of agricultural crops. Plant growth regulators such as auxins, cytokinins, polyamines, gib...
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Article
Macrocystis angustifolia is a potential source of enzyme inhibitors linked to type 2 diabetes and dementia
In continuation of the screening of South African seaweeds to identify potential candidates for the development of pharmaceutically active functional foods, we investigated the inhibitory effects of a crude 80...
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Article
Abscisic acid, gibberellins and brassinosteroids in Kelpak®, a commercial seaweed extract made from Ecklonia maxima
The seaweed extract Kelpak® made from the kelp Ecklonia maxima is registered as a biostimulant for use in agriculture. It elicits many beneficial responses including improved root and shoot growth, higher yields ...
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Article
Influence of culture age on the phytochemical content and pharmacological activities of five Scenedesmus strains
Five axenic Scenedesmus strains (MACC-411, MACC-422, MACC-493, MACC-720, and MACC-727) were cultured and harvested after 5 and 10 days in culture. Using colorimetric methods, the concentrations of total phenolic,...
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Chapter
Bioactive Metabolites and Value-Added Products from Marine Macroalgae
The natural product chemistry of marine organisms has received substantial attention during recent years as a promising and new area of study. Among these, marine algae or seaweeds have proven to be a rich sou...
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Article
Seedlings of medicinal plants treated with either a cytokinin antagonist (PI-55) or an inhibitor of cytokinin degradation (INCYDE) are protected against the negative effects of cadmium
Cytokinins are plant hormones that regulate diverse processes during plant growth and development. Targeted manipulation of their metabolism or perception has already shown benefits in agriculture. Recently, w...
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Article
Lipid productivity and fatty acid composition in Chlorella and Scenepdesmus strains grown in nitrogen-stressed conditions
Thirty Chlorella and 30 Scenedesmus strains grown in nitrogen-stressed conditions (70 mg L−1 N) were analyzed for biomass accumulation, lipid productivity, protein, and fatty acid (FA) composition. Scenedesmus st...
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Article
Involvement of cis-Zeatin, Dihydrozeatin, and Aromatic Cytokinins in Germination and Seedling Establishment of Maize, Oats, and Lucerne
The aims of this study were to monitor endogenous cytokinin levels during germination and early seedling establishment in oats, maize, and lucerne to determine which cytokinin forms are involved in these proce...
