Role of <i>Eucalyptus globulus</i> wound wood extractives: evidence of superoxide dismutase‐like activity

Eyles, Alieta; Davies, Noel W.; Mitsunaga, Tohru; Mihara, Rie; Mohammed, CL

doi:10.1111/j.1439-0329.2004.00361.x

Cited by 20 publications

(17 citation statements)

References 22 publications

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“…The attenuation of renal damage was confirmed by microscopic examination. These findings are in agreement with those reported in an earlier study [34]. Previous studies indicate that nutraceutical benefits of the extract of our plant have been attributed to the flavonoids and phenolic compounds it contains [35].…”

Section: Discussionsupporting

confidence: 96%

Nephroprotective and antioxidant properties of Artemisia arborescens hydroalcoholic extract against oestroprogestative-induced kidney damages in rats

Dhibi¹,

Bouzenna²,

Samout³

et al. 2016

Biomedicine & Pharmacotherapy

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Section: Discussionsupporting

confidence: 96%

Nephroprotective and antioxidant properties of Artemisia arborescens hydroalcoholic extract against oestroprogestative-induced kidney damages in rats

Dhibi¹,

Bouzenna²,

Samout³

et al. 2016

Biomedicine & Pharmacotherapy

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“…This activity is probably due to the presence of hydrolysable tannins in both organs with their predominance in fruits. Our results are in agreement with those reported by Eyles et al (2004), these authors have estimated the superoxide dismutase-like activity of crude E. globulus extracts obtained from wounded wood using the water-soluble tetrazolium salt assay, they concluded that the fraction which contains hydrolysable tannins including pedunculagin, di-, tri-and tetragalloylglucose as well as the standard compounds pentagalloyl glucose and pedunculagin showed the highest levels of antioxidant activity. In addition, it has been reported that the antioxidant activity of gallotannins increased with increasing number of galloyl groups (Tian et al, 2009).…”

Section: Figuresupporting

confidence: 83%

Phytochemical analysis and antioxidant activity of chromatographic fractions from Eucalyptus globulus plant

2017

JCEBC

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Abstract:Eucalyptus leaf extract is a natural food additive which is included as one of the antioxidant in the list of existing food additives. Taking this into consideration, we compared the phytochemistry of fruits of Eucalyptus globulus to that of its leaves, by measuring the phenolic contents and the antioxidant effect of their crude acetonic extracts and their chromatographic fractions. Fraction extracts (Fa, Fb and Fc) were obtained by Sephadex LH-20 column chromatography using ethanol, methanol and acetone as elution solvents. Compared to extract of the leaves, crude extract of fruits contain the highest level of total phenolics and tannins, and exhibited the highest antioxidant effect. Crude extract of fruits has showed the best antioxidant activity compared to its fractions, but fractions (Fb and Fc) of leaves were most active than their crude extract. A positive and moderate correlation was found between phenolic contents and the antioxidant activity of both organs. This study demonstrates that the antioxidant power of crude extract of E. globulus fruits is higher than that of its leaves which are considered as a natural food additive. So, their use as preservative in food industry is of immense significance in view of the toxicological implications of the indiscriminate use of synthetic antioxidant.Key words: Eucalyptus globulus; natural food additive, phenolic compounds; chromatographic fractions; antioxidant activity. 1.IntroductionNowadays there is a significant consumer demand for minimally processed foods and free from synthetic chemical preservatives with the perception of being ''natural". As a result the food industry is facing great challenges to produce naturally occurring food antimicrobials and antioxidants to reduce the use of synthetic chemical preservatives and still produce safe foods that are also regarded as healthy. Also, there are increasing trends to use herbal life style and dietary choices for human welfare and to improve the productivity and health of farm animals these natural products can help the whole body and improve the immunological status (Mahmoodi et al., 2011). In the other hand, Western society appears to be experiencing a trend of 'green' consumerism, desiring fewer synthetic food additives Open Access SDRP Journal of Chemical Engineering & Bioanalytical ChemistryLila Boulekbache-Makhlouf Eucalyptus globulus is native to Australia, it is represented by around 700 species is a genus of tall, evergreen and magnificent trees cultivated world over for its oil, gum, pulp, timber, medicine and aesthetic value (Batish et al., 2008). E. globulus is widely cultivated in subtropical and Mediterranean regions and was introduced in Algeria in 1854 by Ramel (BoulekbacheMakhlouf et al., 2010). There are 30000 ha plantations in 1990 and 39000 ha in 1995 (Mahmoudi, 1988). Its secondary metabolites are now being recognised as potential renewable natural resources for human health care The objective of the present work is to compare the phenolic composition and the antioxidant activ...

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“…Thus, healthy trees were strongly associated with polysaccharidases which can break down carbohydrates and release glucose as a source of available energy. Rubber trees can respond to such wounds or stresses by producing defensive chemicals including polyphenol as tannins (Eyles et al 2004). This effect may result from the difference in chemical composition between the leaves from healthy and affected trees which could have an impact on the quality of the litter and consequently on enzyme activities.…”

Section: Discussionmentioning

confidence: 99%

Biological activity of soils under rubber trees (Hevea brasiliensis) affected by trunk phloem necrosis

et al. 2011

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Trunk phloem necrosis (TPN) is currently one of the most economically important diseases of the rubber tree (Hevea brasiliensis). Investigations of the aetiology of the disorder have failed to identify any biotic causal agents but a multidisciplinary study has recently suggested that the disease may be caused by a combination of exogenous and endogenous stresses. These stresses can affect plant physiology and may also have an impact on soil biology and soil biochemistry. In this study, macrofauna diversity and soil enzyme activities were compared for the soils under trees affected by TPN and under healthy trees. Principal component analysis revealed associations between TPN and macrofauna diversity and soil enzyme activities. Groups of ants and termites were associated with the soil under healthy and trees affected by TPN respectively. Polysaccharidase (cellulase, xylanase and, particularly, amylase) activities were lower in the soil under trees affected by TPN whereas N-acetylglucosaminidase activity was higher. These findings suggested that termite density and N-acetylglucosaminidase activity are useful indicators of TPN, while lower values of polysaccharidases activities are the consequence of this disease. The impact of TPN on soil ecosystem was discussed.

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Role of Eucalyptus globulus wound wood extractives: evidence of superoxide dismutase‐like activity

Cited by 20 publications

References 22 publications

Nephroprotective and antioxidant properties of Artemisia arborescens hydroalcoholic extract against oestroprogestative-induced kidney damages in rats

Nephroprotective and antioxidant properties of Artemisia arborescens hydroalcoholic extract against oestroprogestative-induced kidney damages in rats

Phytochemical analysis and antioxidant activity of chromatographic fractions from Eucalyptus globulus plant

Biological activity of soils under rubber trees (Hevea brasiliensis) affected by trunk phloem necrosis

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