Leaf age, position and anatomical influences on the distribution of the secondary metabolites, homonataloin and three isomers of aloeresin in Aloe hereroensis (Aloaceae) leaves

Shen, Zhenguo; Chauser-Volfson, Elena; Hu, Zhenghao; Gutterman, Yitzchak

doi:10.1016/s0254-6299(15)31134-0

Cited by 7 publications

(12 citation statements)

References 23 publications

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“…High absorbance was observed within the UV region. This corresponds to the compounds homonataloin (342-344 nm), aloeresin-1 (298-300 nm) and aloeresin-2 and -3 (300-302 nm) reported by Shen et al (2001). TLC profiles ( Fig.…”

Section: Resultsmentioning

confidence: 53%

“…Aloe species contain a number of pharmacologically active compounds including homonataloin, aloeresin, aloe emodin, aloin (the C-glucoside of aloe emodin) and chrysophanol, all of which have been reported to exhibit antimicrobial activity (Shen et al, 2001;Kambizi and Afolayan, 2008). The level of these compounds in Aloe plants is highly variable and appears to depend on the species and strain of Aloe as well as their growing conditions (Wamer et al, 2003).…”

Section: Resultsmentioning

confidence: 99%

“…Besides providing defense against microbial invasion and herbivores, phenolic compounds in Aloe plants also play a crucial role in protection against UV irradiation damage (Shen et al, 2001). This makes Aloe plants an important pharmaceutical ingredient for skin products and gels.…”

Section: Resultsmentioning

confidence: 99%

“…The crude EtOH and PE extracts were applied to Silica gel 60 F 254 on polyester plates, 10 cm × 20 cm, (Merck, Germany) and developed with ethyl acetate:methanol:water (100:16.5:13.5) in a pre-saturated chromatographic chamber (Shen et al, 2001). The developed plates were dried in a stream of warm air and visualised under visible (VIS) and ultraviolet (UV) light (254 and 366 nm).…”

Section: Thin Layer Chromatographymentioning

confidence: 99%

See 3 more Smart Citations

Antimicrobial, anti-inflammatory and mutagenic investigation of the South African tree aloe (Aloe barberae)

Ndhlala

Amoo

Stafford

et al. 2009

Journal of Ethnopharmacology

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Section: Resultsmentioning

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Thin Layer Chromatographymentioning

confidence: 99%

See 2 more Smart Citations

Antimicrobial, anti-inflammatory and mutagenic investigation of the South African tree aloe (Aloe barberae)

Ndhlala

Amoo

Stafford

et al. 2009

Journal of Ethnopharmacology

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“…It was found that barbaloin, aloeresin and aloenin are concentrated in different tissues of the leaf (Shen et al, 2001;Chauser-Volfson et al, 2002). In spite of this fact the relative changes in the content of these three metabolites during leaf storage were similar.…”

Section: Discussionmentioning

confidence: 96%

Changes in secondary phenolic metabolites during storage as an aqueous suspension in comparison with the content in harvested Aloe arborescens leaves

Gutterman

Chauser-Volfson

2006

Int J of Food Sci Tech

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Summary Aloe arborescens is a very important plant used in the cosmetics and pharmaceutical industries. The main problem using this plant for medicinal and cosmetic purposes is the rapid destruction of the active compounds in aquatic solutions. By frequently pruning the leaves, the content of three secondary phenolic metabolites (SPhMs), barbaloin, aloeresin and aloenin, in the leaves can be increased dramatically. The changes in these SPhMs were studied in an aqueous suspension of leaf exudate powder and in harvested leaves after storage for 1–45 days at 4 °C in darkness. During storage in water there was rapid degradation of aloenin, but a gradual and slow degradation of barbaloin and aloeresin. In contrast, in stored leaves, the change in the relative amounts of the three SPhMs was similar, but the percentage of aloenin was higher even after 3.5 months. When these SPhMs are stored as dry powder they may last for some years.

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Influences of leaf pruning on the content of the secondary phenolic metabolites barbaloin, aloeresin and aloenin, in the leaves of Aloe arborescens

Chauser-Volfson

Gutterman

Scott³

2004

South African Journal of Botany

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Eight leaves from four different plants of Aloe hereroensis and 18 leaf parts of each leaf were tested by anatomic, fluorescence microscopy and TLC methods. Four phenolic secondary metabolites, homonataloin and three isomers of aloeresin, were found in the leaves. The highest content of these metabolites was found in the top third of a leaf and along the leaf margins. In the margins, the content of the four secondary metabolites in the adaxial was higher than in the abaxial direction. In the centre parts of the leaves, the metabolic content of the abaxial parts was higher than in the adaxial parts. The results indicate that homonataloin mainly accumulates in the inner bundle sheath cells (IBSC). The three isomers of aloeresin appear in the outer bundle sheath and in the boundary cells between the chlorenchyma and water-storage tissues. The density of the vascular bundles, the area ratio of the chlorenchyma to the tested counterpart, and the area ratio of the IBSC to a whole bundle are important structural factors to determine the differences in the content of these four secondary metabolites in all the leaf parts. The distribution according to the rosette leaf arrangement and the existence of the 'cocktail' of four phenolic secondary metabolites indicate a peripheral defence strategy of this plant. Figure 10. The ratio of the volume of the chlorenchyma to the whole tested leaf counterparts (% ± SE) of 12 leaf parts of Aloe hereroensis leaves (Fig. 5), as well as the width of the chlorenchyma (mm ± SE)

show abstract

Leaf age, position and anatomical influences on the distribution of the secondary metabolites, homonataloin and three isomers of aloeresin in Aloe hereroensis (Aloaceae) leaves

Cited by 7 publications

References 23 publications

Antimicrobial, anti-inflammatory and mutagenic investigation of the South African tree aloe (Aloe barberae)

Antimicrobial, anti-inflammatory and mutagenic investigation of the South African tree aloe (Aloe barberae)

Changes in secondary phenolic metabolites during storage as an aqueous suspension in comparison with the content in harvested Aloe arborescens leaves

Influences of leaf pruning on the content of the secondary phenolic metabolites barbaloin, aloeresin and aloenin, in the leaves of Aloe arborescens

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