The orbicules and allergenic protein of African tulip tree (Spathodea campanulata P.Beauv.): a roadside ornamental plant in Malang, Indonesia

Professional peat-free substrates for ornamental plant production are increasingly required by nursery growers. Most promising materials are green compost, coconut coir dust, and woody fibre, used alone or in mixtures. One of the major concerns is pH, usually higher than optimal. In this work, a method based on a three-step procedure was adopted to acidify three organic matrices alone or in mixtures and to individuate the most suitable product, between iron(II) sulphate 7-hydrate and elemental sulphur chips. Firstly, the determination of the buffering capacity by dilution with sulphuric acid was carried out to determine dosages. Afterwards, an incubation trial of 84 (iron(II) sulphate) or 120 days (sulphur chips) was conducted on matrices and substrate mixtures with calculated doses in a climatic chamber maintained at 21 °C. Iron(II) sulphate resulted not suitable because it caused a rapid, but not lasting, pH lowering and an excessive electrical conductivity (EC) increase. Sulphur chips could instead guarantee an adequate and lasting pH lowering. These results were then validated in the open field trial on matrices and substrates. The proposed acidification methodology could be considered in developing new substrates, but the rapidity of pH acidification and EC increase on plant and mineral nutrition should be further investigated.

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Relationship between Phenolic Compounds, Antioxidant Properties, and the Allergenic Protein Mal d 1 in Different Selenium-Biofortified Apple Cultivars (Malus domestica)

Molecules ◽

10.3390/molecules26092647 ◽

2021 ◽

Vol 26 (9) ◽

pp. 2647

Author(s):

Sabrina Groth ◽

Christoph Budke ◽

Timo Weber ◽

Susanne Neugart ◽

Sven Brockmann ◽

...

Keyword(s):

Phenolic Compounds ◽

Antioxidant Properties ◽

Total Phenolic ◽

Allergenic Protein ◽

Antibody Recognition ◽

Allergenic Potential ◽

Allergenic Proteins ◽

Other Substances ◽

Mal D 1 ◽

Apple Cultivars

Notable parts of the population in Europe suffer from allergies towards apples. To address this health problem, the analysis of the interactions of relevant allergens with other substances such as phenolic compounds is of particular importance. The aim of this study was to evaluate the correlations between the total phenolic content (TPC), polyphenol oxidase (PPO) activity, antioxidant activity (AOA), and the phenolic compound profile and the content of the allergenic protein Mal d 1 in six apple cultivars. It was found that the PPO activity and the content of individual phenolic compounds had an influence on the Mal d 1 content. With regard to the important constituents, flavan-3-ols and phenolic acids, it was found that apples with a higher content of chlorogenic acid and a low content of procyanidin trimers and/or epicatechin had a lower allergenic potential. This is probably based on the reaction of phenolic compounds (when oxidized by the endogenous PPO) with proteins, thus being able to change the conformation of the (allergenic) proteins, which further corresponds to a loss of antibody recognition. When apples were additionally biofortified with selenium, the composition of the apples, with regard to TPC, phenolic profile, AOA, and PPO, was significantly affected. Consequently, this innovative agronomic practice seems to be promising for reducing the allergenic potential of apples.

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Enhancement of cadmium uptake by Amaranthus caudatus, an ornamental plant, using tea saponin

Environmental Monitoring and Assessment ◽

10.1007/s10661-016-5334-z ◽

2016 ◽

Vol 188 (6) ◽

Cited By ~ 14

Author(s):

Seydahmet Cay

Keyword(s):

Ornamental Plant ◽

Cadmium Uptake ◽

Amaranthus Caudatus ◽

Tea Saponin

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Nutrient, pH, Alkalinity, and Ionic Property Levels in Runoff Containment Basins in Alabama, Louisiana, Maryland, Mississippi, and Virginia Ornamental Plant Nurseries

HortScience ◽

10.21273/hortsci11647-16 ◽

2017 ◽

Vol 52 (4) ◽

pp. 641-648 ◽

Cited By ~ 1

Author(s):

Warren E. Copes ◽

Haibo Zhang ◽

Patricia A. Richardson ◽

Bruk E. Belayneh ◽

Andrew Ristvey ◽

...

Keyword(s):

Water Quality ◽

Ammonium Nitrogen ◽

Quality Parameter ◽

Ornamental Plant ◽

Total Alkalinity ◽

Water Quality Parameter ◽

Runoff Water ◽

Manganese Zinc ◽

Water Ph ◽

Parameter Values

Nine runoff containment basins (RCBs), used directly or indirectly for irrigating plants in ornamental plant nurseries, and one adjacent stream were sampled for water quality between Feb. and July 2013 in Maryland (MD), Mississippi (MS), and Virginia (VA). Triplicate water samples were taken monthly. Analysis was done for 18 water quality variables including nitrate-nitrogen (NO3−-N) and ammonium-nitrogen (NH4+-N), orthophosphate-phosphorus (PO4-P) and total-phosphorus (T-P), potassium, calcium, magnesium, sulfur, aluminum, boron (B), copper (Cu), iron (Fe), manganese, zinc (Zn), pH, total alkalinity (T-Alk), electrical conductivity (EC), and sodium. Additionally, 15 RCBs from 10 nurseries in Alabama (AL), Louisiana (LA), and MS were sampled in 2014 and 2016. Most prevalent correlations (P = 0.01) were between macronutrients, EC, B, Fe, and Zn, but none were prevalent across a majority of RCBs. Water quality parameter values were mostly present at low to preferred levels in all 25 waterways. Macronutrient levels were highest for a RCB that receives fertility from fertigation derived runoff. Water pH ranged from acidic to alkaline (>8). Results of this study show water quality in RCBs can be suitable for promoting plant health in ornamental plant nurseries, but also shows levels will vary between individual RCBs, therefore demonstrates need to verify water quality from individual water sources.

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