Pollination And Dispersal

Pollination And Dispersal

Flowers of almost all Aloe species are diurnal, tubular, brightly coloured red or yellow, unscented and produce abundant nectar. These features point to ornithophily as the pollination syndrome, and sunbirds (Nectariniidae) are frequent visitors to aloe flowers in the field and in African gardens (Figure 1.2). Although they are not typical melittophilous flowers, aloes are also visited by bees. In some areas, especially in South Africa, the flowering of aloes is important in apiculture, though...

Antihistamine and antiinflammatory activities of barbaloin

Aloe Vera Anatomy Images

Inhibitory effect ID 50 of barbaloin on antigen dinitrophenyl-bovine serum albumin and compound 48 80-induced histamine from mast cells degranulation was shown to Figure 14.1 Structure of barbaloin, aloesin and aloenin. Figure 14.1 Structure of barbaloin, aloesin and aloenin. be 0.02 and 0.06mg ml, respectively, and barbaloin was focused as an important constituent in Kidachi aloe. Anti-inflammatory activity of barbaloin was exhibited by the monitoring of carrageenin-induced edema in rats and...

Geographical Distribution

The majority of Aloe species occur naturally on mainland Africa, in tropical and subtropical latitudes. The genus is found almost throughout the African continent south of the Sahara Desert, except for the moist lowland forest zones and the western end of West Africa. As will be seen in Figure 1.1 the majority of species occur in southern Africa and on the eastern side of the continent. Many other species are found on the Arabian Peninsula and on Madagascar and a few, mostly formerly in the...

Anatomy Refrences Of Aloevera

Akev, N. and Can, A. 1999 Separation and some properties of Aloe vera L. leaf pulp lectins. Phytotherapy Research, 13,489-493. Afzal, M., Ali, M., Hassan, R.A.H., Sweedan, N. and Dhami, M.S.I. 1991 Identification of some prostanoids in Aloe vera extract. Planta Medica, 57, 38-40. Agarwala, O.P. 1997 Whole leaf aloe gel vs. standard aloe gel. Drug and Cosmetics industry, February 22-28. Ashleye, A.D. 1983 Applying heat during processing the commercial Aloe vera gel. Erde International, 1, 40-44....

Figure Of Aloe Species

Figure 3.10 Esters of barbaloin derivatives Figure 3.11 C,O,-Diglucosylated compounds. Figure 3.11 C,O,-Diglucosylated compounds. chrysophanol dimers, A, B, C and D from A. saponaria (Figure 3.12) (Yagi et al, 1978b) and a pair of diastereomers based on aloe-emodin from A. elgonica, present as gluco-sides (Conner etal., 1990b) and then found in A. vera (Choi etal., 1996). Dimer A was found to be identical to (+) asphodelin (4,7'-bichrysophanol) (Gonzalez etal, 1973) and was identified in the...

Chemical Constituents

Aloes contain anthraquinone derivatives (10 to 40 ) like aloin, mucilage (30 ), resinous substances (16 to 63 ) like aloesin and aloesone, sugars (about 25 ), polysaccharides like acemannan and betamannan, fatty acids and cholesterol, campe-sterol, P-sistosterol, glycoproteins (aloctins A and B), lectins, a gibberellin-like substance, enzymes such as cyclo-oxygenase and bradykininase, together with other compounds such as lupeol, salicylic acid, urea, cinnamic acid, phenol, sulphur, magnesium...

Reference On Aloe Vera Biochemistry

Agarwala, O.P. (1997) Whole leaf aloe gel vs. standard aloe gel. Drug and Cosmetics Industry, February, 22-28. Akev, N. and Can, A. (1999) Separation and some properties of Aloe vera L. leaf pulp lectins. Phytotherapy Research, 13, 489-493. Aspinall, G.O. (1980) Chemistry of cell wall polysaccharides. In The Biochemistry of Plants, edited by J. Preiss, p. 473. New York, Academic Press. Bewley, J.D. and Reid, J.S.G. (1985) Mannana and glucomannans. In Biochemistry of Storage Carbohydrates in...

Tetrahydroanthracenone glycosides

Isobarbaloin

The 6-O-glucosides of aloesaponol I and II were described from A. saponaria Yagi etal, 1977 as well as the 8-O-glucoside aloesaponol III Yagi etal., 1977 . Subsequently the 4-O-glucosides of aloesaponol III and IV were isolated from A. barbadensis callus tissue Yagi etal, 1998 . These compounds are considered typical of aloe leaf exudate constituents although they do not, in fact, occur in all species Reynolds, 1985b . Where they do occur they are usually the main component of the exudate and...

Alovera Medicine Plants Introduction

Two features of the Aloe family make them somewhat unique in the field of medicinal plants. First, there is no agreement on which ailments they might cure and second, there is no agreement on the components within the aloe plant that may exert beneficial medicinal activity. Anecdotal reports describe a bewildering array of both immuno-stimulating and immunosuppressive effects. Few controlled studies have supported these claims and to this day, much uncertainty exists as to whether aloe extracts...