| Abstract: |
`Malva is a widespread tropical and temperate genus of the family Malvaceae which is characterized by the presence of many biological active compounds such as: sterols, terpenes, flavonoids, tannins and polyphenolic compounds beside the presence of anthocyanines and anthocyanidenes. .So, this thesis comprises a phytochemical study of a plant from this family and belong to genus Malva which was grown in Egypt, namely Malva parviflora L. to perform:Morphological description of its different organs to facilitate the identification of the plant in its entire form.1. Isolation and characterization of its chemical constituents.2. Biological study of the plant extracts.Morphological description of M. parviflora L.Morphological description of different organs was carried out to characterize the plant; as a result the following character comprises the main diagnostic features:1- Malva parviflora L. is an annual or perennial herb that It has a decumbent or erect habit, growing to 50-100 cm in height the broad leaves have 5 to 7 lobes and are 8 to 10 cm in diameter. It has small white or purple flowers with 4 to 6 mm 10 mg petals. The plant flowers from March to May.2- The stems are covered with stiff star – like (stellate) hairs and can be erect or ascending (at first spreading horizontally and then be coming erect) and rather fibrous.3-The leaves are circular and 8 – 10 cm in diameter. The base of the leaf is cordate and heart shaped with a notch at the base, margins are crenate. The leaves are palmately veined with 5-7 short triangular lobes. The petiole is mostly 1.5-12 cm long and rarely 20 cm.4-The flowers have 5 petals that are about 4-6 mm long white or purple in colour, and twisted in the bud.5- The fruit is a schizocarp (a dry fruit which splits into individual carpels). It is 7-8 mm in diameter and separates into 8-12, 1 seeded mericarps. The schizocarp is disc-shaped surrounded by the calyx (sepals of the flowers) and brown.6-The inflorescent has 2-4 flowers per axil, crowded pedicels in fruit generally less than 10mm. bractlets are linear and 1-2 mm diameter.Part IPhytochemical Investigation of M. parviflora L.Chapter 1Preliminary screening of the plant powdera. Preliminary screening proved the probable presence of carbohydrates and /or glycosides, flavonoids, sterols and /or triterpenes, tannins, saponins, mucilage and not containsublimate constituents as alkaloids and volatile isothiocyanate. b. Pharmacopeal constant of the plant.`Malva is a widespread tropical and temperate genus of the family Malvaceae which is characterized by the presence of many biological active compounds such as: sterols, terpenes, flavonoids, tannins and polyphenolic compounds beside the presence of anthocyanines and anthocyanidenes. .So, this thesis comprises a phytochemical study of a plant from this family and belong to genus Malva which was grown in Egypt, namely Malva parviflora L. to perform:Morphological description of its different organs to facilitate the identification of the plant in its entire form.1. Isolation and characterization of its chemical constituents.2. Biological study of the plant extracts.Morphological description of M. parviflora L.Morphological description of different organs was carried out to characterize the plant; as a result the following character comprises the main diagnostic features:1- Malva parviflora L. is an annual or perennial herb that It has a decumbent or erect habit, growing to 50-100 cm in height the broad leaves have 5 to 7 lobes and are 8 to 10 cm in diameter. It has small white or purple flowers with 4 to 6 mm 10 mg petals. The plant flowers from March to May.2- The stems are covered with stiff star – like (stellate) hairs and can be erect or ascending (at first spreading horizontally and then be coming erect) and rather fibrous.3-The leaves are circular and 8 – 10 cm in diameter. The base of the leaf is cordate and heart shaped with a notch at the base, margins are crenate. The leaves are palmately veined with 5-7 short triangular lobes. The petiole is mostly 1.5-12 cm long and rarely 20 cm.4-The flowers have 5 petals that are about 4-6 mm long white or purple in colour, and twisted in the bud.5- The fruit is a schizocarp (a dry fruit which splits into individual carpels). It is 7-8 mm in diameter and separates into 8-12, 1 seeded mericarps. The schizocarp is disc-shaped surrounded by the calyx (sepals of the flowers) and brown.6-The inflorescent has 2-4 flowers per axil, crowded pedicels in fruit generally less than 10mm. bractlets are linear and 1-2 mm diameter.Part IPhytochemical Investigation of M. parviflora L.Chapter 1Preliminary screening of the plant powdera. Preliminary screening proved the probable presence of carbohydrates and /or glycosides, flavonoids, sterols and /or triterpenes, tannins, saponins, mucilage and not containsublimate constituents as alkaloids and volatile isothiocyanate. b. Pharmacopeal constant of the plant.
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