Chapter Nine Functional genomics approaches to unravel essential oil biosynthesis

2002 ◽  
pp. 145-162
Author(s):  
Bernd Markus Lange ◽  
Raymond E.B. Ketchum
Keyword(s):  
Essential Oil ◽  
Functional Genomics ◽  
Oil Biosynthesis

scholarly journals Effects of light irradiation on essential oil biosynthesis in the medicinal plant Asarum heterotropoides Fr. Schmidt var. mandshuricum (Maxim) Kitag

PLoS ONE ◽  
2020 ◽  
Vol 15 (9) ◽  
pp. e0237952
Author(s):  
Zhiqing Wang ◽  
Shengyuan Xiao ◽  
Yufang Wang ◽  
Jiyong Liu ◽  
Haiqin Ma ◽  
...  
Keyword(s):  
Essential Oil ◽  
Medicinal Plant ◽  
Light Irradiation ◽  
Oil Biosynthesis ◽  
Asarum Heterotropoides

scholarly journals Bioenergetics of Monoterpenoid Essential Oil Biosynthesis in Nonphotosynthetic Glandular Trichomes

2017 ◽  
Vol 175 (2) ◽  
pp. 681-695 ◽  
Author(s):  
Sean R. Johnson ◽  
Iris Lange ◽  
Narayanan Srividya ◽  
B. Markus Lange
Keyword(s):  
Essential Oil ◽  
Glandular Trichomes ◽  
Oil Biosynthesis

Transcriptome analysis of the palmarosa Cymbopogon martinii inflorescence with emphasis on genes involved in essential oil biosynthesis

2019 ◽  
Vol 140 ◽  
pp. 111602 ◽  
Author(s):  
Gurminder Kaur ◽  
Surjeet Kumar Arya ◽  
Babita Singh ◽  
Sanchita Singh ◽  
Yogeshwar Vikram Dhar ◽  
...  
Keyword(s):  
Essential Oil ◽  
Transcriptome Analysis ◽  
Oil Biosynthesis ◽  
Cymbopogon Martinii

CYTOKININ, GIBBERELLIC ACID AND DEFOLIATION ON DENSITY AND MORPHOLOGY OF TRICHOME OF Pelargonium graveolens L’Hér FOR ESSENTIAL OIL BIOSYNTHESIS

Agrociencia ◽  
2021 ◽  
Vol 55 (4) ◽  
pp. 331-346
Author(s):  
Zenzile Peter Khetsha ◽  
Moosa Mahmood Sedibe ◽  
Rudolph Johannes Pretorius ◽  
Elmarie van der Watt
Keyword(s):  
Essential Oil ◽  
Gibberellic Acid ◽  
Morphological Changes ◽  
Glandular Trichomes ◽  
Plant Leaves ◽  
Pelargonium Graveolens ◽  
Oil Biosynthesis ◽  
Hail Net ◽  
Hail Damage ◽  
Leaf Surfaces

The density and morphology of glandular trichomes in rose geranium (Pelargonium graveolens L’Her.) are often correlated to the essential oil biosynthesis. However, whether the different organs in the same rose geranium plant are affected by hail damage, or if they recover similarly following hail damage is still unknown concerning the essential oil biosynthesis. The objective of this study was to evaluate the effects of split-applying cytokinin (CK), gibberellic acid (GA) and defoliation on rose geranium trichome morphology and density, and essential oil biosynthesis. The experiment was carried out in a hail-net covered tunnel structure during 2017-2018 growing season. The experimental design was a complete randomized blocks with a 3x3 factorial arrangement of treatments: three defoliation levels (0, 50, and 100%), two levels of split-application of CK and GA (0.32 mg L-1 CK + 150 mg L-1 GA; and 0.64 mg L-1 CK + 300 mg L-1 GA), and a control. The attenuate, peltate, and capitate trichome groups were identified in the leaf. Morphologically, the attenuate trichome group was less dense on both recovered and new plant leaves, despite split-applied CK and GA treatment. With the peltate group, brevicollate trichome density declined in all plant leaves treated with 0.64 mg L-1 CK + 300 mg L-1 GA on both leaf surfaces. Application of 0.64 mg L-1 CK + 300 mg L-1 GA led to high density of the elongated-capitate type on leaves recovered from 50 and 100% defoliation. The essential oil yield was not affected by density and morphological changes of the trichomes. However, the application of 0.32 mg L-1 CK + 150 mg L-1 GA increased the citronellol content where plants endured 100% defoliation. Results demonstrated that the effects of hail damage stress and subsequent split-applied CK and GA could transform the morphology of trichomes, subsequently increasing the density.

scholarly journals Essential Oil Biosynthesis and Regulation in the Genus Cymbopogon

2010 ◽  
Vol 5 (1) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Deepak Ganjewala ◽  
Rajesh Luthra
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Biological Activities ◽  
Biological Significance ◽  
Model System ◽  
Regulatory Mechanisms ◽  
Plant Family ◽  
Oil Biosynthesis ◽  
Pharmaceutical Industries ◽  
Work Done

Essential oils distilled from Cymbopogon species are of immense commercial value as flavors and fragrances in the perfumery, cosmetics, soaps, and detergents and in pharmaceutical industries. Two major constituents of the essential oil, geraniol and citral, due to their specific rose and lemon like aromas are widely used as flavors, fragrances and cosmetics. Citral is also used for the synthesis of vitamin A and ionones (for example, β-ionone, methyl ionone). Moreover, Cymbopogon essential oils and constituents possess many useful biological activities including cytotoxic, antiinflammatory and antioxidant. Despite the immense commercial and biological significance of the Cymbopogon essential oils, little is known about their biosynthesis and regulatory mechanisms. So far it is known that essential oils are biosynthesized via the classical acetate-MVA route and existence of a newly discovered MEP pathway in Cymbopogon remains as a topic for investigation. The aim of the present review is to discuss the biosynthesis and regulation of essential oils in the genus Cymbopogon with given emphasis to two elite members, lemongrass (C. flexuosus Nees ex Steud) and palmarosa (C. martinii Roxb.). This article highlights the work done so far towards understanding of essential oil biosynthesis and regulation in the genus Cymbopogon. Also, based on our experiences with Cymbopogon species, we would like to propose C. flexuosus as a model system for the study of essential oil metabolism beyond the much studied plant family Lamiaceae.

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