Variation in polyphenolic content of Athrixia phylicoides (L.) (bush tea) leaves with season and nitrogen application

Mudau, Fhatuwani N.; Soundy, Puffy; Toit, E.S. du; Olivier, J.J.

doi:10.1016/j.sajb.2005.10.007

Cited by 45 publications

(52 citation statements)

References 12 publications

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“…4a, b) and similar findings have been reported by Mudau et al (2006). N and P concentrations, besides total phenolics, in the branchlets showed considerable reduction during senescence in the current study.…”

Section: Relationship Between Total Phenolics and Nutrient Concentratsupporting

confidence: 92%

Changes in the N and P concentrations, N:P ratios, and tannin content in Casuarina equisetifolia branchlets during development and senescence

Zhang

Lin

et al. 2008

Journal of Forest Research

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Changes in the N and P concentrations, N:P ratios, and tannin content in Casuarina equisetifolia branchlets across a coastal gradient were studied at Chishan Forestry Center of Dongshan County, Fujian Province, China. (1) Total phenolics and protein precipitation capacity in young branchlets was significantly higher than in mature and senescent branchlets across a coastal gradient; extractable condensed tannin content was higher in young and mature branchlets than in senescent branchlets. Whereas proteinbound condensed tannins increased with senescence, fiberbound condensed tannins fluctuated without a consistent pattern; (2) N and P concentrations at various stages of branchlet development across a coastal gradient followed the same order: young branchlets [ mature branchlets [ senescent branchlets; N:P ratio of young branchlets was the lowest, and increased with maturity and senescence across a coastal gradient; phosphorus resorption efficiency was significantly higher than nitrogen resorption efficiency among corresponding coastal gradients in response to P deficiency (high N:P ratio), but nutrient resorption efficiency was influenced by coastal gradients; (3) significant linear relationships between total phenolics and nutrient contents indicated that polyphenolics had a potential effect on nutrient cycling.

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Section: Relationship Between Total Phenolics and Nutrient Concentratsupporting

confidence: 92%

Changes in the N and P concentrations, N:P ratios, and tannin content in Casuarina equisetifolia branchlets during development and senescence

Zhang

Lin

et al. 2008

Journal of Forest Research

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“…Most of the increase in condensed tannin content occurred between 0 and 300 kg ha -1 N. The highest condensed tannins were obtained during autumn (4.5%) and winter (3.7%). Mudau et al (2006) reported that the highest total polyphenols were produced during winter months (June and July) in wild bush tea when no nitrogen fertilizer was applied. Total polyphenols were reported to increase in a quadratic fashion to N applications, with most of the total polyphenols increasing between 0 to 300 kg ha -1 N, regardless of the season 2007b).…”

Section: Resultsmentioning

confidence: 99%

Effects of nitrogen, phosphorus and potassium nutrition on seasonal tannin content of bush tea (Athrixia phyliciodesDC.)

Chabeli¹,

Mudau

Mashela³

et al. 2008

South African Journal of Plant and Soil

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“…The resprouted shoots were fertilized in the same manner as the initial plants. Weather data are presented in Table 1; this was the best time to cultivate bush tea in South Africa (Mudau et al, 2006(Mudau et al, , 2007.…”

Section: Methodsmentioning

confidence: 99%

Effect of Timing and Rates of Nitrogen Application on Yield, Chemical Compositions, Pharmacologic Activities, and Cytotoxicity of Herbal Bush Tea (Athrixia phylicoides DC.)

Tshivhandekano¹,

Mudau²,

Tshikalange³

2018

horts

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Bush tea is a popular South African herbal and medicinal tea with the potential for commercialization. The objective of the study was to investigate the effects of different rates of applied nitrogen (N) and timing (early and late) of N application on yield, chemical composition, pharmacologic activity, and cytotoxicity of bush tea. Factorial treatments consisted of timed N application rates (0, 75, 150, and 225 kg·ha–1) for both early and late N application. The treatments were arranged in a randomized complete block design with five replicates. The results show a significant positive response of bush tea fresh and dry leaf and twig weight, chlorophyll, leaf tissue N, total polyphenols, and total flavonoids in response to applied N rates, regardless of the timing of N application, reaching a maximum at 225 kg·ha–1 of N. Later, regardless of the timing of N application, total tannins and total antioxidant activity increased with increasing applied N from 0 to 225 kg·ha–1, reaching a maximum of 150 kg·ha–1 N. The results of this study suggest that, with the exception of antimicrobial activity, most of the parameters recorded increased with increasing rates of N applied. The results further denote that parameters recorded were consistently greater on early applied N compared with late applied N. However, there was no significant difference between the minimum inhibition concentration (MIC) and minimum microbicide concentration (MMC) of early and late applied N. Bush tea applied with 75 N and 150 N had a significant MIC value (3.1 mg·mL–1) for Escherichia coli and Klebsiella pneumonia compared with 6.3 mg·mL–1 reached at 225 kg·ha–1 N. Among N rates applied, the MIC for Klebsiella oxytoca, Proteus vulgaris, Salmonella typhi, Serratia marcescence, and Staphylococcus aureus were not significantly different. Hence, N rates applied did not have a significant effect on bush tea MMC values of all microbial species tested. The cytotoxicity of bush tea leaf and twigs harvested from early and late N application were significantly reduced with increasing nitrogen levels reaching a maximum at 225 kg·ha─1. There was a wide variation of compounds despite rates of N applied as well as timing of application, with most compounds such as norfenfluramine, phytol, caryophyllene, propylene glycol, α-copaene, and squalene detected in greater quantities.

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Variation in polyphenolic content of Athrixia phylicoides (L.) (bush tea) leaves with season and nitrogen application

Cited by 45 publications

References 12 publications

Changes in the N and P concentrations, N:P ratios, and tannin content in Casuarina equisetifolia branchlets during development and senescence

Changes in the N and P concentrations, N:P ratios, and tannin content in Casuarina equisetifolia branchlets during development and senescence

Effects of nitrogen, phosphorus and potassium nutrition on seasonal tannin content of bush tea (Athrixia phyliciodesDC.)

Effect of Timing and Rates of Nitrogen Application on Yield, Chemical Compositions, Pharmacologic Activities, and Cytotoxicity of Herbal Bush Tea (Athrixia phylicoides DC.)

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