Altitudinal Variation of Phenolic Contents in Flowering Heads of Arnica montana cv. ARBO: a 3-Year Comparison

Spitaler, Renate; Winkler, Andrea; Lins, Isabella; Yanar, Sema; Stuppner, Hermann; Zidorn, Christian

doi:10.1007/s10886-007-9407-x

Cited by 90 publications

(73 citation statements)

References 15 publications

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“…and greenhouse, Sofia region 553 m a.s.l. The positive correlation between altitude and the content of caffeic acid derivatives in A. montana cv Arbo flower heads was reported (SPITALER et al 2006(SPITALER et al , 2008. Higher levels of flavonoids in the extracts of flower heads of ex vitro and in vivo grown plants were observed compared to corresponding leaf extracts.…”

Section: Discussionmentioning

confidence: 78%

Comparative study of in vitro, ex vitro and in vivo grown plants of Arnica montana – polyphenols and free radical scavenging activity

Nikolova¹,

Petrova²,

Zayova³

2013

Acta Botanica Croatica

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-Arnica montana L. is an endangered species rich in sesquiterpene lactones, phenolic acids and flavonoids with high pharmaceutical value. The polyphenolic content and free radical scavenging activity of plants that had passed all stages of cultivation: micropropagation and rooting (in vitro), adaptation in greenhouse (ex vitro) and mountain conditions (in vivo) were evaluated. Four surface flavonoid aglycones [scutellarein 6-methyl ether (hispidulin), scutellarein 6,4'-dimethyl ether (pectolinarigenin), 6-OH luteolin 6-methyl ether and kempferol-6-methyl ether] were detected in the acetone exudates of the studied samples by means of thin layer chromatography. No differences in the accumulation of surface flavonoids were found among the tested leaf extracts of in vitro, ex vitro and in vivo samples. However, the extracts from the flowers were richer in surface flavonoids than extracts from the leaves. The methanol extracts of the samples from ex vitro and in vivo grown A. montana plants had significantly higher radical scavenging activity and polyphenolic content than the extracts of in vitro samples. The observed differences in the contents of these biologically active compounds were related to different growth conditions and stages of plant development. The biotechnological method of A. montana established holds promise for the future production of antioxidants.

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Section: Discussionmentioning

confidence: 78%

Comparative study of in vitro, ex vitro and in vivo grown plants of Arnica montana – polyphenols and free radical scavenging activity

Nikolova¹,

Petrova²,

Zayova³

2013

Acta Botanica Croatica

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“…When the plants are growing in hilly-terrain (high altitude) low temperature and the sunlight contains enhanced UV-β radiations, which may induced oxidative stresses in the plant, hence the plants overcome from the oxidative stresses need to be synthesis of more UV-absorbing and free radical scavenging phenols in plants. 33 The hilly-terrain low temperature may increase the production of phenolics by enhancing synthesis of phenylalanine ammonia lyase (PAL) in plants, while high altitude and long exposure to sunlight hours with higher UV radiation positively affect the activity of enzyme such as phenolics synthase. 34 Meanwhile, small amounts of hilly precipitation could enhance the defense system of plant against stress factor, leading to an increased phenolic content.…”

Section: Discussionmentioning

confidence: 99%

The Comparative Studies of the Phytochemical Levels and the in vitro Antioxidant Activity of Tridax procumbens L. from Different Habitats

Gnanasekaran

John²,

Gandhi³

et al. 2016

FRA

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INTRODUCTIONTridax procumbens (family-Asteraceae) is commonly known as "Ghamra". In English it is popularly called as "coat buttons" because of the appearance of the flowers. It has been extensively used in Ayurvedic system of medicine for various illnesses. It is a well known medicine for liver disorders.1 This plant extract know to express various pharmacologically active compounds which has been shown to have roll in immunomodulatory, hypoglycemic, hepatoprotective action. It was also shown antioxidant, anti-inflammatory, analgesic, anti-arthritic and wound healing effect and have been used as a skeletal muscle relaxant.2-9 The phytochemical screening of the different plant parts like leaf, stem, flower and root of Tridax have revealed the presence of alkaloids, flavonoids (catechins and flavones) and tannins. 10,11 Phytochemicals are chemical compounds, created or biosynthesized through the usual metabolic pathways in the plants. These chemicals are often referred to as secondary metabolites. These secondary metabolites have no direct activity in the primary metabolic cycles, such as photosynthesis, respiration, transpiration and mineral metabolism etc. But they have been proved to have major roles in the stress tolerance and defense mechanisms.12 Secondary metabolites are important for the plants interactions such as plant-pollinator, plant-pathogen and plant-herbivore. These are classified into three major classes (alkaloids, terpenoids and phenolics) and habitually colored, aromatic and tasty compounds.13 They are also used in signaling and regulation of primary metabolic pathways. Secondary metabolites are used by many pharmaceuticals, agrochemicals, biopesticides, flavoring, coloring agents, and as food additives.14 The biosynthesis of secondary metabolites is controlled by various factors such as genetics and ecological factors. 15The quantity of secondary metabolites in medicinal plants is strongly dependent on the growing conditions and synthesis is regulated by external environmental stimuli 16 Abiotic factors such as high and low temperatures, drought, alkalinity, salinity of the soil, ultraviolet radiation stresses have been known as more potential factors for manipulating and promoting the accumulations of secondary metabolites in medicinal plants. [17][18][19] The abiotic factors of the growing area such as soil fertility, local geoclimate, humidity, light and temperature, seasonal changes and cultivation techniques, have also been shown to impact on the metabolism and synthesis of the secondary metabolites. 20 Hence the aim of the study to investigates the habitats influences on in-vitro antioxidant activities and the quantity of phytochemical (total phenol, flavonoid and tannin) variations in leaves and flowers of Tridax. MATERIALS AND METHODS Plant materialsTridax leaves and flowers were collected from the three different habitats:-1. Kolli-Hills (is a mountain situated in the Ester Ghats in Namakkal district of Tamil, Nadu India. The mountains are about 1000 to 1300 m in altitude and cover a...

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“…Highest content of phytochemicals (phenols, tannins and alkaloids) was observed in the plants collected from Apharwat with an altitude of 2850m asl. This increase in the phenolic content with increase in altitude may be ascribed as a response of plants to enhanced UV-B radiation and decreased temperatures which elicit amplified biosynthesis of UV-absorbing and antioxidant phenolics in plant [24]. Copaja reported that saponin production is higher at high altitudes where the prevailing environmental conditions are stressful.…”

Section: Discussionmentioning

confidence: 99%

Altitudinal Variation In Some Phytochemical Constituents And Stomatal Traits Of Primula Denticulata

Bhat¹,

Nawchoo²,

Ganai³

2015

Int J of Adv in Sci Res

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Due to extensive medicinal importance and wide distributional range of Primula denticulata Sm., locally known as Doker-neej (Kashmiri) of family Primulaceae, in Kashmir valley, the present investigation was carried out to study the variations in phenology, stomatal traits and content of phytochemicals of the species in relation to altitude. During the present investigation, trends in the stomatal traits which include: stomatal density, length and breadth of guard cells and potential conductance index (PCI) along an altitudinal gradient were analyzed by using standard methods. Samples from different populations with varying altitudes were also subjected to qualitative and quantitative estimation for the presence of various phytochemicals by using various spectrophotometric techniques. It was observed that mean values of the analyzed stomatal traits in the four populations varied significantly (p≤0.05) across the populations. Phytochemicals such as phenols, tannins, alkaloids and saponins were present in all the sampled populations but their quantity varied significantly across the populations. This assessing of phytochemical content of plants at varying altitudes can help to select elite genotype and reflect the best suited altitude for commercial cultivation of the species as these phytochemicals are considered as the basis for their medicinal activity.

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Altitudinal Variation of Phenolic Contents in Flowering Heads of Arnica montana cv. ARBO: a 3-Year Comparison

Cited by 90 publications

References 15 publications

Comparative study of in vitro, ex vitro and in vivo grown plants of Arnica montana – polyphenols and free radical scavenging activity

Comparative study of in vitro, ex vitro and in vivo grown plants of Arnica montana – polyphenols and free radical scavenging activity

The Comparative Studies of the Phytochemical Levels and the in vitro Antioxidant Activity of Tridax procumbens L. from Different Habitats

Altitudinal Variation In Some Phytochemical Constituents And Stomatal Traits Of Primula Denticulata

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