The Influence of Climate on the Active Principles in Medicinal Plants

Flück, H

doi:10.1111/j.2042-7158.1955.tb12050.x

Cited by 25 publications

(9 citation statements)

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“…There is no decision for anthraquinones and anthocyanins because the colour observed for anthraquinone is not very similar to the expected one while for anthocyanins the colour expected in acidic medium is observed in basic medium and the colour to be observed in acidic medium was absent. From what we learn from Fluck (1955), the climate has influence in one way or another to the active compounds of medicinal plants. Therefore, the abundance of some of the aforementioned active compounds should also be explained by the good quality of the Rwandan climate under which the plants have grown and leaves were harvested.…”

Section: Resultsmentioning

confidence: 99%

Preliminary investigation on anthelmintic activity and phytochemical screening of leaf crude extracts of Tithonia diversifolia and Tephrosia vogelii

Justin¹,

RÃ©dampta²,

Viateur³

et al. 2014

Afr. J. Microbiol. Res.

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This investigation lies within the framework of studying the phytochemistry of two medicinal plants Tithonia diversifolia and Tephrosia vogelii and assessing their potentials in controlling the helminthiasis in goats. The crude extracts were obtained from the leaves by Soxhlet methodology and phytochemical screening, fecal eggs reduction and the anthelmintic activities were tested in various laboratories in Butare. The results from this investigation showed that both T. diversifolia and T. vogelii have lots of active principles grouped in alkaloids, tannins, flavonoids, terpenoids,and sterols and exhibit anthelmintic activities in goats. The percentages of reduction of fecal eggs are 98, 97, 96 and 95% with methanol crude extract of T. vogelii, infusion of T. vogelii, methanol crude extract of T. diversifolia and infusion of T. diversifolia, respectively. This investigation showed the efficacy of both T. vogelii and T. diversifolia against gastrointestinal nematodes in goats and therefore their potentials in assuring more the animal health care in Rwanda by for treating the parasitic nematodes in goats by plant-based drugs instead of crude extracts.

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Section: Resultsmentioning

confidence: 99%

Preliminary investigation on anthelmintic activity and phytochemical screening of leaf crude extracts of Tithonia diversifolia and Tephrosia vogelii

Justin¹,

RÃ©dampta²,

Viateur³

et al. 2014

Afr. J. Microbiol. Res.

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“…In the essential oil plants, the content of the essential oil is mostly variable and many factors such as drying conditions, distillation techniques, geographic and climatic factors such as duration of daylight, temperature, water stress and plant growth phase play an important role in yield and composition of essential oils 7–11. Productivity and ontogenetic variability of O. onites have been studied and it has been noted that an ontogenetic variability exists in the amount of essential oil yield and composition 12.…”

Section: Introductionmentioning

confidence: 99%

The influence of harvest time on essential oil composition, phenolic constituents and antioxidant properties of Turkish oregano (Origanum onites L.)

2009

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“…Recently we observed that A. conyzoides L. leaves can absorb UV rays. Since biological activity of a plant depends on secondary metabolites and amount of secondary metabolite in plant varies with season [1][2][3][4][5][6][7][8][9][10][11], in the present work we have studied effect of season on UV absorption property of A. conyzoides L. leaves.…”

Section: Discussionmentioning

confidence: 99%

Seasonal Effect on UV Absorbing Property of Ageratum conyzoides Linn Leaves

Ghosh¹,

Mitra²,

Mitra³

2020

Act Scie Pharma

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Secondary metabolites also known as active metabolites/active principles produced by plants are chemicals which have no direct role in growth of plants but are responsible to defend plants against exogenous biotic/abiotic constraints. Alkaloids, phenolic compounds, terpenoids and sulphur containing compounds are mainly four classes of secondary metabolites in plants. These metabolites exert pharmacological activities like anti gastric ulcer, anti microbial, anti inflammatory, anti diabetic, anti oxidant, anti allergic, anti cancer etc. [1] Amount of secondary metabolite present in plant varies with season. As early as 1955 Fluck and Pharm showed the influence of climate on the active principles in medicinal plants [2]. Thereafter, series of experiments were conducted in this direction. That the amount of oak leaf tannins and nutrients changes with season was noticed by Feeny in 1970 [3]. Gupta in 1977 observed that during summer amount of active principle constituents of Eclipta prostrata L.. was maximum [4]. In 1982 Schultz., et al. showed that leaf quality of two northern hardwoods tree species varies with season [5]. Vasicine content of Adhatoda vasica was found maximum in autumn by Arambewela., et al. in 1988 [6]. In 1989 Mauffette and Oechel noted that leaf chemistry of the coast live oak Quercus agrifolia changes with season [7]. Drossopoulos., et al. in 1996 observed that mineral nutrients and carbohydrates in walnut tree leaves were maximum in rainy season [8]. In 1997 Coli., et al.

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The Influence of Climate on the Active Principles in Medicinal Plants

Cited by 25 publications

References 0 publications

Preliminary investigation on anthelmintic activity and phytochemical screening of leaf crude extracts of Tithonia diversifolia and Tephrosia vogelii

Preliminary investigation on anthelmintic activity and phytochemical screening of leaf crude extracts of Tithonia diversifolia and Tephrosia vogelii

The influence of harvest time on essential oil composition, phenolic constituents and antioxidant properties of Turkish oregano (Origanum onites L.)

Seasonal Effect on UV Absorbing Property of Ageratum conyzoides Linn Leaves

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