Research Paper in Herbal Chemistry

In vitro inhibitory effect of Monodora myristica and Eucalyptus torelliana essential oils on the mycelial growth of Mycosphaerella fijiensis a pathogenic agent of the black leaf streak disease of banana and plantain

Camara Brahima, Amari Ler-N’ogn Dade Georges Elisee, Cherif Mamadou, Dick Emmanuel, Tuo Seydou, Kanko Coffi, Kone Daouda

 Banana and plantain whose fruits are a significant food source for the populations of Côte d’Ivoire, are sensitive to many diseases. Among them, the most significant due to the fungi is the black leaf streak disease caused by Mycosphaerella fijiensis which can involve more than 50 % of the losses of the production. The fight against this disease is primarily directed towards the use of synthetic fungicides. These substances, constitute a source of environmental pollution and foodstuffs rejection on the world market due to their residues. The biological fight using essential oils extracted from aromatic plants against this disease seems to be an alternative way. The present study was led in vitro to determine the antifongic activity of two essential oils extracted from Eucalyptus torelliana and Monodora myristica compared to a synthetic fungicide (spiroxamine), on the mycelial growth of Mycosphaerella fijiensis isolated from banana leaves in Côte d'Ivoire. Five concentrations of both essential oils and synthetic fungicide were added to the fungus culture medium (PDA). The mycelial growth was measured every 3 days during 21 days in the Petri dishes. The essential oil extracted from Monodora myristica presented a high fongitoxic effect at concentrations uper 7 000 ppm with a CI50 equal to 744.046 ppm. On the other hand the essential oil of Eucalyptus torelliana and synthetic fungicide had an increasing fongitoxic activity according to concentrations used. Their CI50 were respectively 3158.900 and 0.0145 ppm. Essential oils from the flora of Côte d’Ivoire can reduce or inhibit the mycelial growth of Mycosphaerella fijiensis and can constitute a means of effective biological fight against the black leaf streak disease.disease.">

Aonla and its processing – A review

G.H. Athawale* and Dr. S.H. Akbari

Aonla is often known as Indian Gooseberry is considered to be an adaptogen which means that it has key compounds that normalize body functions and help the body to adapt to a variety of changes and stress conditions. Aonla is known for its medicinal and nutritional properties. This article will help different aonla processers as it consist details regarding different varieties of aonla and effect of different processing methods on the nutrient quality of aonla and different traditional products which are made using aonla.

Phytochemical and In vitro Anti-Inflammatory Evaluation of Aqueous Extract of Croton Klotzchianus Leaves

T. Radha and R. Kannan

The aqueous extract of leaves of croton klotzchianus were screened for the presence of various phytochemicals by standard procedures. It was confirmed the presence of flavonoids and terpenoids. Invitro anti-inflammatory was evaluated using albumin denaturation assay and membrane stabilization at different concentrations. The results obtained in the present study indicate the aqueous extract of leaves of croton klotzchianus can be a potential source of anti-inflammatory activity.

Study of the variation in the chemical composition of Eichhornia crassipes exposed to external aggressions

Sènandémi Edwige Reine MAHUNON, Martin Pépin AINA, Edmond Konan KOUASSI, Cokou Pascal AGBANGNAN-DOSSA, Benjamin Kouassi YAO, Kopoin ADOUBY

Used in several areas including sanitation, water hyacinth is known for its ability to absorb pollutants which in turn represent an external aggression for the plant. This work aims to study the variation of the chemical compounds secreted by this plant to deal with external aggressions. The major families of chemical compounds were identified, according to the standard procedure, in the species of Eichhornia crassipes from two countries (Benin and Ivory Coast). The results showed the presence of several secondary metabolites (free flavonoids, polyphenols, sterols, leucoanthocyanins and terpenoids). Determination of the phenolic compounds revealed a high concentration of total flavonoids compared to tannins and polyphenols, whatever the state of the plant (fresh or dry). Furthermore, the species harvested in Côte d'Ivoire are richer in these metabolites than those harvested in Benin. Used in wastewater treatment, it reveals a readjustment of the total polyphenol content (CPT) when the duration of the treatment increases from 5 to 15 days. However, the levels of condensed tannins (TC) and total flavonoids (FT) were multiplied by three or even four. A more or less noticeable increase in the content of total phenolic compounds, total flavonoids and condensed tannins was observed when water hyacinth was used in the treatment of high-level waste water (944mgO2 / L).