scholarly journals The Diversity of Volatile Compounds in Australia’s Semi-Desert Genus Eremophila (Scrophulariaceae)

Plants ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 785
Author(s):  
Nicholas J. Sadgrove ◽  
Guillermo F. Padilla-González ◽  
Alison Green ◽  
Moses K. Langat ◽  
Eduard Mas-Claret ◽  
...  
Keyword(s):  
Essential Oils ◽  
Volatile Compounds ◽  
2D Nmr ◽  
Chemical Diversity ◽  
Desert Shrubs ◽  
Multiple Sampling ◽  
Australian Continent ◽  
Chemical Profiles ◽  
Chemical Studies ◽  
New Metabolites

Australia’s endemic desert shrubs are commonly aromatic, with chemically diverse terpenes and phenylpropanoids in their headspace profiles. Species from the genus Eremophila (Scrophulariaceae ex. Myoporaceae) are the most common, with 215 recognised taxa and many more that have not yet been described, widely spread across the arid parts of the Australian continent. Over the years, our research team has collected multiple specimens as part of a survey to investigate the chemical diversity of the genus and create leads for further scientific enquiry. In the current study, the diversity of volatile compounds is studied using hydrodistilled essential oils and leaf solvent extracts from 30 taxa. Several rare terpenes and iridoids were detected in chemical profiles widely across the genus, and three previously undescribed sesquiterpenes were isolated and are assigned by 2D NMR—E-11(12)-dehydroisodendrolasin, Z-11-hydroxyisodendrolasin and 10-hydroxydihydro-α-humulene acetate. Multiple sampling from Eremophila longifolia, Eremophila arbuscular, Eremophila latrobei, Eremophila deserti, Eremophila sturtii, Eremophila oppositifolia and Eremophila alternifolia coneys that species in Eremophila are highly chemovariable. However, taxa are generally grouped according to the expression of (1) furanosesquiterpenes, (2) iridoids or oxides, (3) mixtures of 1 and 2, (4) phenylpropanoids, (5) non-furanoid terpenes, (6) mixtures of 4 and 5, and less commonly (7) mixtures of 1 and 5. Furthermore, GC–MS analysis of solvent-extracted leaves taken from cultivated specimens conveys that many heavier ‘volatiles’ with lower vapour pressure are not detected in hydrodistilled essential oils and have therefore been neglected in past chemical studies. Hence, our data reiterate that chemical studies of the genus Eremophila will continue to describe new metabolites and that taxon determination has limited predictive value for the chemical composition.

scholarly journals Advanced Chemophenetic Analysis of Essential Oil from Leaves of Piper gaudichaudianum Kunth (Piperaceae) Using a New Reduction-Oxidation Index to Explore Seasonal and Circadian Rhythms

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2116
Author(s):  
Ygor Jessé Ramos ◽  
Claudete da Costa-Oliveira ◽  
Irene Candido-Fonseca ◽  
George Azevedo de Queiroz ◽  
Elsie Franklin Guimarães ◽  
...  
Keyword(s):  
Essential Oils ◽  
Weighted Average ◽  
Chemical Diversity ◽  
Terpene Biosynthesis ◽  
Phenological Stages ◽  
Compound C ◽  
A Value ◽  
Chemical Profiles ◽  
Aromatic Species ◽  
Piper Gaudichaudianum

The aromatic species Piper gaudichaudianum Kunth (Piperaceae) is widely used in Brazil for medicinal and ritualistic applications. In the current study, chemophenetic patterns were realized across season and circadian rhythm based on the chemical profile of essential oils (EOs) from leaves. Hydrodistilled essential oils were analyzed by GC-MS and GC-FID, and a new calculation of metabolite oxidation level, averaged for each individual molecule component of the EO, was used to explore the patterns of metabolism/biosynthesis. This new index used an intermediate calculation, the ‘weighted average redox standard’ (SRO), to enable a value for mixtures of metabolites to be generated, the ‘general mixture redox index’ (GMOR). The indices were subjected to a proof-of-concept approach by making comparison to outcomes from multivariate analyses, i.e., PCA and HCA. Chemical analysis demonstrated that the essential oils were dominated by sesquiterpenes, constructed of 15 classes of compound (C-skeletons), and 4 C-skeletons were recognized in the monoterpene group, giving a total of 19. The variation of chemical profiles was distinct at different phenological stages, but stronger chemical variation was evident between day and night as compared to season. Furthermore, due to comprehensive sampling across different regions, nine chemotypes were recognized, including those previously reported. The SRO and GMRO indices demonstrate that phenological variation of chemistry is mainly an outcome of redox fluctuations in terpene biosynthesis, changing from day to night. These indices also corroborate that chemical diversity is increased with oxidative metabolism. Lastly, the current study demonstrates pronounced phenotypic plasticity in P. gaudichaudianum, which makes it a suitable candidate to help further our understanding of chemophenetics and chemical ecology.

scholarly journals Chemical, diversity and biotechnological potential of endophytic fungi isolated from Brazilian Cerrado plants

2021 ◽  
Vol 21 (2) ◽  
Author(s):  
Sara Bruna Souza Dantas ◽  
Flavia Alessandra Mota Alves ◽  
Vanessa Mara Chapla
Keyword(s):  
Endophytic Fungi ◽  
Chemical Diversity ◽  
Endemic Plant ◽  
Biotechnological Potential ◽  
Potential Applications ◽  
Chemical Studies ◽  
Almost All ◽  
New Compounds ◽  
Endemic Plant Species ◽  
New Metabolites

Abstract: This is a systematic review of scientific articles reporting the biodiversity of endophytic fungi isolated from endemic Cerrado plants in Brazil and exposes the potential applications of these microorganisms in the production of known and new metabolites. The “Portal de Periódicos” (CAPES), Science Direct, PubMed, Scielo, and Biblioteca Virtual em Saúde (BVS) databases were used. A total of 418 articles were found using the following sets of keywords: Endophytic, fungi, and Cerrado; endophytic, fungi, rupestrian, and grass lands; endophytic, fungi, Brazilian, and savanna; among these, 14 articles were selected. The articles were grouped into studies on the biodiversity of Cerrado endophytic fungi, chemical studies, and other subjects. All the articles were found to be related to the diversity present in the Cerrado of the southeastern and midwestern regions, they show high fungal biodiversity with Diaporthe genus predominant in almost all plants studied. In all the studies on the chemical diversity of endophytic fungi, new compounds or new natural products were found associated with a range of bioactivity, especially antifungal. It shows the great potential of endophytes in the production of new and bioactive secondary metabolites, as well as the unexplored chemical diversity of endophytes isolated from endemic plant species. The review shows that rare studies performed in regions where the Cerrado biome are predominant, including the central, north, and northeast regions, representing an important niche that is still unexplored.

scholarly journals Chemical Diversity and Therapeutic Effects of Essential Oils of Aniba Species from the Amazon: A Review

Plants ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1854
Author(s):  
Rafaela C. S. da Trindade ◽  
Júlia Karla A. M. Xavier ◽  
William N. Setzer ◽  
José Guilherme S. Maia ◽  
Joyce Kelly R. da Silva
Keyword(s):  
Essential Oils ◽  
Biological Activities ◽  
Hierarchical Cluster ◽  
Geographic Area ◽  
Chemical Diversity ◽  
Therapeutic Effects ◽  
Tropical Regions ◽  
Main Compound ◽  
Chemical Profiles ◽  
Amazonas State

Lauraceae families have great diversity in the world’s tropical regions and are represented mainly by aromatic shrubs and trees with significant production of essential oils (EOs). This work presents a review of the EO chemical profiles from specimens of Aniba, including their seasonal variations, geographical distributions, and biological activities in the Amazon biome. Based on the survey, 15 species were reviewed, representing 167 oil samples extracted from leaves, twig barks, and woods. Brazilian Amazon was the most representative geographic area in the number of specimens, highlighting the locations Belém, (Pará state, PA) (3 spp., 37 samples), Santarém (PA) (3 spp., 10 samples), Carajás (PA) (3 spp., 7 samples), and Manaus (Amazonas state, AM) (3 spp., 16 samples). The main compound classes identified in oils were benzenoids and phenylpropanoids, represented by 1-nitro-2-phenylethane, benzyl salicylate, benzyl benzoate and methyleugenol, along with terpenoids, especially monoterpenes and sesquiterpenes, such as linalool, α-phellandrene, β-phellandrene, β-selinene, and spathulenol. The EOs from Aniba showed considerable variation in the chemical profiles according to season and collection site. The hierarchical cluster analysis classified the samples into two main groups according to chemical composition. This review highlights its comprehensive and up-to-date information on history, conservation, traditional uses, chemosystematics, pharmacological potential of Aniba species.

scholarly journals Chemical Variability of Peel and Leaf Essential Oils in the Citrus Subgenus Papeda (Swingle) and Few Relatives

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1117
Author(s):  
Clémentine Baccati ◽  
Marc Gibernau ◽  
Mathieu Paoli ◽  
Patrick Ollitrault ◽  
Félix Tomi ◽  
...  
Keyword(s):  
Essential Oils ◽  
13C Nmr ◽  
Chemical Diversity ◽  
Field Crop ◽  
High Chemical ◽  
Crop Species ◽  
Nmr Spectrometry ◽  
Chemical Variability ◽  
Almost All ◽  
Experimental Crosses

The Papeda Citrus subgenus includes several species belonging to two genetically distinct groups, containing mostly little-exploited wild forms of citrus. However, little is known about the potentially large and novel aromatic diversity contained in these wild citruses. In this study, we characterized and compared the essential oils obtained from peels and leaves from representatives of both Papeda groups, and three related hybrids. Using a combination of GC, GC-MS, and 13C-NMR spectrometry, we identified a total of 60 compounds in peel oils (PO), and 76 compounds in leaf oils (LO). Limonene was the major component in almost all citrus PO, except for C. micrantha and C. hystrix, where β-pinene dominated (around 35%). LO composition was more variable, with different major compounds among almost all samples, except for two citrus pairs: C. micrantha/C. hystrix and two accessions of C. ichangensis. In hybrid relatives, the profiles were largely consistent with their Citrus/Papeda parental lineage. This high chemical diversity, not only among the sections of the subgenus Papeda, but also between species and even at the intraspecific level, suggests that Papeda may be an important source of aroma diversity for future experimental crosses with field crop species.

scholarly journals Variation in the Chemical Composition of Five Varieties of Curcuma longa Rhizome Essential Oils Cultivated in North Alabama

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 212
Author(s):  
William N. Setzer ◽  
Lam Duong ◽  
Ambika Poudel ◽  
Srinivasa Rao Mentreddy
Keyword(s):  
United States ◽  
Essential Oils ◽  
Curcuma Longa ◽  
Southeastern United States ◽  
Traditional Herbal Medicine ◽  
Humid Climate ◽  
Tropical Regions ◽  
Chromatographic Techniques ◽  
Chemical Profiles ◽  
Bioactive Agents

Turmeric (Curcuma longa L.) is an important spice, particularly is Asian cuisine, and is also used in traditional herbal medicine. Curcuminoids are the main bioactive agents in turmeric, but turmeric essential oils also contain health benefits. Turmeric is a tropical crop and is cultivated in warm humid environments worldwide. The southeastern United States also possesses a warm humid climate with a growing demand for locally sourced herbs and spices. In this study, five different varieties of C. longa were cultivated in north Alabama, the rhizome essential oils obtained by hydrodistillation, and the essential oils were analyzed by gas chromatographic techniques. The major components in the essential oils were α-phellandrene (3.7–11.8%), 1,8-cineole (2.6–11.7%), α-zingiberene (0.8–12.5%), β-sesquiphellandrene (0.7–8.0%), ar-turmerone (6.8–32.5%), α-turmerone (13.6–31.5%), and β-turmerone (4.8–18.4%). The essential oil yields and chemical profiles of several of the varieties are comparable with those from tropical regions, suggesting that these should be considered for cultivation and commercialization in the southeastern United States.

scholarly journals The Genus Haplophyllum Juss.: Phytochemistry and Bioactivities—A Review

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4664
Author(s):  
Majid Mohammadhosseini ◽  
Alessandro Venditti ◽  
Claudio Frezza ◽  
Mauro Serafini ◽  
Armandodoriano Bianco ◽  
...  
Keyword(s):  
Organic Acids ◽  
Essential Oils ◽  
Web Of Science ◽  
Biological Activities ◽  
Scientific Information ◽  
Comprehensive Review ◽  
Scientific Databases ◽  
Organic Extracts ◽  
Chemical Profiles ◽  
Therapeutic Properties

Herein, a comprehensive review is given focusing on the chemical profiles of the essential oils (EOs), non-volatile compounds, ethnobotany, and biological activities of different Haplophyllum (Rutaceae family) species. To gather the relevant data, all the scientific databases, including Scopus, ISI-WOS (Institute of Scientific Information-Web of Science), and PubMed and highly esteemed publishers such as Elsevier, Springer, Taylor and Francis, etc., were systematically retrieved and reviewed. A wide array of valuable groups of natural compounds, e.g., terpenoids, coumarins, alkaloids, lignans, flavonoids, and organic acids have been isolated and subsequently characterized in different organic extracts of a number of Haplophyllum species. In addition, some remarkable antimicrobial, antifungal, anti-inflammatory, anticancer, cytotoxic, antileishmanial, and antialgal effects as well as promising remedial therapeutic properties have been well-documented for some species of the genus Haplophyllum.

Changes in Volatile Compounds of Virgin Olive Oil Flavored with Essential Oils During Thermal and Photo-Oxidation

2021 ◽  
Author(s):  
Sunduz Sezer Kiralan ◽  
Sermin Goksu Karagoz ◽  
Gulcan Ozkan ◽  
Mustafa Kiralan ◽  
Onur Ketenoglu
Keyword(s):  
Essential Oils ◽  
Olive Oil ◽  
Volatile Compounds ◽  
Virgin Olive Oil ◽  
Photo Oxidation

scholarly journals Differences in New Zealand Hop Cultivars Based on Their Unique Volatile Compounds: An Integrated Fingerprinting and Chemometrics Approach

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 414
Author(s):  
Victoria Purdy ◽  
Biniam Kebede ◽  
Ron Beatson ◽  
Kerry Templeton ◽  
Patrick Silcock ◽  
...  
Keyword(s):  
New Zealand ◽  
Volatile Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Headspace Gas Chromatography ◽  
Commercial Cultivars ◽  
Headspace Gas ◽  
Chemical Fingerprinting ◽  
Chemical Profiles ◽  
Aroma Characteristics ◽  
Feature Selection Techniques

Hop aroma characteristics originate from hop essential oils, which have complex chemical profiles that remain poorly understood, particularly for New Zealand hops. The aim of this study was to determine volatile compounds that distinguish New Zealand hop cultivars. Untargeted fingerprinting methods based on headspace gas chromatography mass spectrometry (GC-MS) were used to analyse nine hop cultivars. A total of 61 volatile compounds were identified as compounds that differentiated the commercial hop varieties using advanced chemometrics and feature selection techniques. Similarities in volatile composition were found between Wakatu, Wai-iti™ and Kohatu®, which are rich in alcohols. Another grouping was found between Waimea™ and Nelson Sauvin™, where ketones and esters were commonly found. Rakau™ was distinct from the other eight cultivars, distinguished by 2-methylbutyl 3-methylbutanoate and methanethiol hexanoate. Riwaka™ contained the greatest number of discriminating volatile compounds when compared to other cultivars, which was dominated by terpenoids, such as geranyl 2-methylbutanoate, perillene and D-limonene. The chemical fingerprinting approach successfully identified volatile compounds that had not been previously found in New Zealand hop cultivars and that discriminated the commercial cultivars. The data obtained in the present study further extend the knowledge of New Zealand hops and will help facilitate targeted breeding.

scholarly journals A Review on Cistus sp.: Phytochemical and Antimicrobial Activities

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1214
Author(s):  
Imane Zalegh ◽  
Mohamed Akssira ◽  
Mohammed Bourhia ◽  
Fouad Mellouki ◽  
Naima Rhallabi ◽  
...  
Keyword(s):  
Infectious Diseases ◽  
Essential Oils ◽  
Mediterranean Sea ◽  
Scientific Literature ◽  
Antimicrobial Activities ◽  
Mechanisms Of Action ◽  
Pharmacological Activities ◽  
Global View ◽  
Chemical Profiles ◽  
Phytochemical Profiles

Resistance to drugs is reaching alarming levels and is placing human health at risk. With the lack of new antimicrobials drugs, infectious diseases are becoming harder to treat. Hence, there is an increasing awareness of active phytochemicals with therapeutic functions. The tremendous research interest on the Cistus L. genus includes numerous plants used in traditional medicine by people living around the Mediterranean Sea, also resulted in some interesting discoveries and written literature. This review aimed at gathering scientific literature about Cistus species, describing phytochemical profiles and the various pharmacological activities. We also extensively reviewed the antimicrobial activities, including antiviral, antiparasitic, antifungal, and antibacterial potentials of Essential Oils (EO), raw extracts as well as isolated compounds. Mechanisms of action along with methods used are also investigated in this review. Considering the findings of the Cistus species extracts, this genus offers an adequate reserve of active phytochemicals since many have been used to create drugs. Therefore, this review work can serve society by providing a global view on Cistus L. sp. regarding pharmacological potentials and their chemical profiles.

Sign in / Sign up

Export Citation Format

Share Document