Botany, agronomy and biotechnology of Pelargonium used for essential oil production

Blerot, Bernard; Baudino, Sylvie; Prunier, Cécile; Demarne, F.E.; Toulemonde, Bernard; Caissard, Jean‐Claude

doi:10.1007/s11101-015-9441-1

Cited by 29 publications

(28 citation statements)

References 173 publications

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“…The genus Pelargonium is one of the seven genera of the Geraniaceae family (Geranium, Pelargonium, Erodium, Monsonia, Hypseocharis, Rhynchotheca and Sarcocaulon). This genus contains about 250-280 species and include a range of variation in floral morphologies and life forms [11][12][13]. Hybrids of Pelargonium are cultivated around the world for the production of essential oils and absolutes, but original regions for Pelargonium genus are South Africa and nearby countries.…”

Section: Pelargonium Spp Essential Oilsmentioning

confidence: 99%

“…It's cultivars grow mainly in Reunion Island, China, Egypt, Algeria and Morocco. While China and Egypt are the major producers of pelargonium volatile oils, the Bourbon geranium from Reunion Island is considered as one of the highest quality essential oils [11][12][13][14][15][16]. The oils are characterized by high levels of citronellol, geraniol, isomenthone, linalool accompanied by wide range of esters, such as citronellyl formate, geranyl formate, geranyl acetate, geranyl propionate and sesquiterpenes, of which 10-epi-γ-eudesmol and guaia-6,9-diene are the most important [16,17].…”

Section: Pelargonium Spp Essential Oilsmentioning

confidence: 99%

“…P. graveolens is an aromatic and hairy shrub, erect up to 1-1.3 m tall and 1 m spread with soft to the touch and carved leaves, and usually small, pink flowers. It's essential oil yield is high and varies from 0.1-0.9 % v/w [13,19]. The oil is obtained from leaves, flowers and stalks [21].…”

Section: Pelargonium Spp Essential Oilsmentioning

confidence: 99%

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Evaluation of Chemical Composition of Essential Oils Derived from Different Pelargonium Species Leaves

Szutt

Dołhańczuk-Śródka

Sporek

2019

Ecological Chemistry and Engineering S

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Plants have been used for their aromatic and medicinal purposes for centuries. The genus Pelargonium contains about 250-280 species and cultivated around the world for the production of essential oils and absolutes. Pelargonium species are remarkable for their odour diversity, from fresh, lemon and minty scent, through floral, rose, fruity up to spicy and camphoreous smell as well as many health beneficial properties, that is why their essential oils are widely used in perfume, cosmetic, food and pharmaceutical industries. The aim of this study was to determine variability in populations of Pelargonium genus by evaluating their differences in quantitative and qualitative essential oils compositions. This study determined that of all the examined essential oil, the one of P. graveolens indoor cultivar has the closest C:G ratio (1.16) which makes it a very valuable product. In comparison with available literature, beside the geographical region of plant growth, all essential oils from P. graveolens contain a diverse range of compounds, nevertheless, in every single one, geraniol and citronellol are present in the most significant fraction of the total oil. The examined P. roseum essential oil was characterized by the highest level of citronellol (44.62 % of total oil), but it can be due to the chemical reactions (conversion geraniol into citronellol) occurring in stored product.

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Section: Pelargonium Spp Essential Oilsmentioning

confidence: 99%

Section: Pelargonium Spp Essential Oilsmentioning

confidence: 99%

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Evaluation of Chemical Composition of Essential Oils Derived from Different Pelargonium Species Leaves

Szutt

Dołhańczuk-Śródka

Sporek

2019

Ecological Chemistry and Engineering S

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“…of a new dual semiochemical system for pollinator attraction involving a specific (1:4) blend of (S)-b-citronellol and 2-hydroxy-6-methylacetophenone, both of which are derived from biosynthetically distinct pathways. The latter appears to be a new floral volatile constituent [31], whereas the monoterpene b-citronellol has been reported sporadically from across multiple angiosperm families [32][33][34].…”

Section: Introductionmentioning

confidence: 97%

“…While not on the most common list, citronellol is nonetheless often encountered in floral odors and is perhaps best known as a dominant note in the floral odor bouquet of Pelargonium spp. (Geraniaceae) and in Rosa spp [32][33][34]…”

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confidence: 99%

Complex Sexual Deception in an Orchid Is Achieved by Co-opting Two Independent Biosynthetic Pathways for Pollinator Attraction

Bohman

Wong

et al. 2017

Current Biology

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Sexually deceptive orchids lure their specific male pollinators using volatile semiochemicals that mimic female sex pheromones. To date, the semiochemicals known to be involved consist of blends of chemically and biosynthetically related compounds. In contrast, we report that (S)-β-citronellol and 2-hydroxy-6-methylacetophenone, two biosynthetically distinct compounds, are the active semiochemicals in Caladenia plicata, which is pollinated by male Zeleboria sp. thynnine wasps. They are also sex pheromone components of the female Zeleboria. A 1:4 blend elicits a high rate of attempted copulation (∼70%) in bioassays, equivalent to rates observed at orchid flowers. Whereas β-citronellol is well known, 2-hydroxy-6-methylacetophenone appears to be previously unknown as a floral volatile. Production of the two compounds is restricted to glandular sepal tips; thus, differential expression analysis of contrasting floral tissue transcriptomes was employed to illuminate the biosynthesis. As expected, production of (S)-β-citronellol commences with the terpene synthase GES1 catalyzing the irreversible conversion of geranyl diphosphate (GPP) to geraniol. Contrary to prediction, biosynthesis subsequently proceeds in three steps, commencing with the oxidation of geraniol to geranial by alcohol dehydrogenase ADH3, followed by the enantioselective reduction of a double bond in geranial by geranial reductase GER1 to give (S)-β-citronellal. Finally, ADH3-catalyzed reduction of (S)-β-citronellal results in (S)-β-citronellol. In line with previous work on insects showing that 2-hydroxy-6-methylacetophenone is derived from a polyketide pathway, we report a differentially expressed polyketide synthase (PKS) gene candidate. Thus, in this unique example of sexual deception, pollination is achieved by co-opting and regulating two independent biosynthetic pathways of floral volatile compounds. VIDEO ABSTRACT.

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Biosynthesis, natural distribution, and biological activities of acyclic monoterpenes and their derivatives

2022

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Botany, agronomy and biotechnology of Pelargonium used for essential oil production

Cited by 29 publications

References 173 publications

Evaluation of Chemical Composition of Essential Oils Derived from Different Pelargonium Species Leaves

Evaluation of Chemical Composition of Essential Oils Derived from Different Pelargonium Species Leaves

Complex Sexual Deception in an Orchid Is Achieved by Co-opting Two Independent Biosynthetic Pathways for Pollinator Attraction

Biosynthesis, natural distribution, and biological activities of acyclic monoterpenes and their derivatives

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