Content and distribution of anthrone C-glycosides in the South African arid plant speciesAloe mutabilisgrowing in direct sunlight and in shade in the Negev Desert of Israel

Chauser-Volfson, Elena; Gutterman, Yitzchak

doi:10.1006/jare.1998.0459

Cited by 22 publications

(15 citation statements)

References 6 publications

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“…3,4,5), as we found in previous studies [3 6, 11, 12]. When the two methods were compared the percentages of all three SPhMs were much higher in powder from the water extract than from the exudates, but similar relative to each other (Table 1; Figs.…”

Section: Discussionsupporting

confidence: 66%

The content of secondary phenol metabolites in pruned leaves of Aloe arborescens, a comparison between two methods: leaf exudates and leaf water extract

Gutterman

Chauser-Volfson

2008

J Nat Med

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Aloe arborescens plants, originating from the deserts of South Africa, are grown in the Introduction Garden at Sede Boker in the Negev Desert of Israel. In previous studies, we developed agro-technical methods to raise the content of secondary phenol metabolites (SPhMs) in the Aloe leaves. Plants that are subjected to repeated leaf pruning respond by increasing the content of their SPhMs. The SPhMs found in Aloe arborescens include barbaloin, aloenin and derivatives of aloeresin. Such compounds are used for many purposes, including human skin protection from sun and fire burns and high radiation, as products of the pharmaceutics and cosmetics industries, and as food supplements for treating stomach ulcers and diabetes. In the current study, the SPhMs were separated from pruned leaves of the same A. arborescens plants at the same time by two methods: (1) exudation by squeezing the tissues of the leaves, (2) immersion of the leaves' pruned cut bottom in water and collection of the extract. The exudates and extract were frozen, freeze-dried to a powder and the SPhMs were then separated by chromatography. The yield of powder from water extraction from pruned leaves was much lower than the yield from the exudates. However, higher percentages of the powder from the water extraction contained SPhMs (between 80 and 92.7%). The content of powder in leaf exudates from pruned leaves was much higher because the SPhMs were squeezed out from the cells and tissues. However, the percentages of SPhMs in this powder were much lower (between 39 and 62%).

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Section: Discussionsupporting

confidence: 66%

The content of secondary phenol metabolites in pruned leaves of Aloe arborescens, a comparison between two methods: leaf exudates and leaf water extract

Gutterman

Chauser-Volfson

2008

J Nat Med

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“…In previous studies it was found that in different Aloe species the barbaloin or homonataloin content was higher in younger than in older leaves (Birch & Donavan 1955;Takayulu & Toshifiumi, 1983;Nakagomi et al, 1985;Groom & Reynolds, 1987;Yamamoto et al, 1991;Chauser-Volfson & Gutterman, 1996, 1998. It has also been found that the terminal third of the leaves have the highest percentages of these secondary metabolites and the leaf base third, the lowest (Chauser-Volfson & Gutterman, 1996& Gutterman, , 1997& Gutterman, , 1998.…”

Section: Discussionmentioning

confidence: 81%

“…It has also been found that the terminal third of the leaves have the highest percentages of these secondary metabolites and the leaf base third, the lowest (Chauser-Volfson & Gutterman, 1996& Gutterman, , 1997& Gutterman, , 1998.…”

Section: Discussionmentioning

confidence: 96%

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Peripheral defence strategy: variation of barbaloin content in the succulent leaf parts of Aloe arborescens Miller (Liliaceae)

Gutterman

Chauser-Volfson²

2000

Botanical Journal of the Linnean Society

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A h a r b m c m is a large, multi-stemmed shrub and is one of the very common Aloe species along the Indian Ocean coast of southern Africa, from the Cape, in the south, to Zimbabwe and Malawi in the north. It is used as a hedge plant to protect agricultural fields or stock and as a horticultural plant in gardens. Barbaloin, a secondary phenolic metabolite, is distributed in the plants as part of a peripheral defence strategy. Barbaloin content was found to be highest in the youngest leaves. Within these, concentration varied at its highest in the terminal third of the leaf, at its lowest in the basal third; higher in the terminal, adaxial, leaf margin and lower in the basal, abaxial, leaf centre. The more times a leaf is cut, the higher the barbaloin content of the new growth from the leaf base that remains on the plant. This may deter animals such as elephants and kudu from eating the new growths. They may prefer to eat other plants that have not been damaged by consumption for longer periods. This phenomenon may give damaged plants the chance to renew themselves before their leaves are consumed again.

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“…The overall concentration or activity of the components was high in the warm season and low in the cold season, and protein, saccharide, polyamines and carboxypeptidase were strongly affected by rainfall putrescine occurred in low concentrations in August [22] . Studies were conducted during 1996-97 to determine the content of barbaloin in leaves from plants of Aloe mutabilis grown in direct sunlight or shade were investigated [23] .…”

Section: Effect Of Seasonal Variation On Barbaloin Contentmentioning

confidence: 99%

Barbaloin: A concise report of its pharmacological and analytical aspects

Patel

Tahilyani³

2012

Asian Pacific Journal of Tropical Biomedicine

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Content and distribution of anthrone C-glycosides in the South African arid plant speciesAloe mutabilisgrowing in direct sunlight and in shade in the Negev Desert of Israel

Cited by 22 publications

References 6 publications

The content of secondary phenol metabolites in pruned leaves of Aloe arborescens, a comparison between two methods: leaf exudates and leaf water extract

The content of secondary phenol metabolites in pruned leaves of Aloe arborescens, a comparison between two methods: leaf exudates and leaf water extract

Peripheral defence strategy: variation of barbaloin content in the succulent leaf parts of Aloe arborescens Miller (Liliaceae)

Barbaloin: A concise report of its pharmacological and analytical aspects

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