Activity of volatile compounds in glandular trichomes ofLycopersicon species against two insect herbivores

1987 ◽  
Vol 13 (4) ◽  
pp. 837-850 ◽  
Author(s):  
Sarah Y. H. Lin ◽  
John T. Trumble ◽  
Junji Kumamoto
Keyword(s):  
Volatile Compounds ◽  
Glandular Trichomes ◽  
Insect Herbivores

scholarly journals Endemic Veronica saturejoides Vis. ssp. saturejoides–Chemical Composition and Antioxidant Activity of Free Volatile Compounds

Plants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1646
Author(s):  
Marija Nazlić ◽  
Dario Kremer ◽  
Renata Jurišić Grubešić ◽  
Barbara Soldo ◽  
Elma Vuko ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Essential Oils ◽  
Volatile Compounds ◽  
Glandular Trichomes ◽  
Stalk Cell ◽  
Total Phenolic ◽  
Hexahydrofarnesyl Acetone ◽  
Sesquiterpene Hydrocarbons ◽  
Scanning Electron Microscope Investigation ◽  
Fatty Aldehydes

Chemical profile and antioxidant activity of the species Veronica saturejoides Vis. ssp. saturejoides (Plantaginaceae)—which is endemic to Croatia, Bosnia and Herzegovina and Montenegro —were investigated. Volatile compounds produced by glandular trichomes (composed of one stalk cell and two elliptically formed head cells according to scanning electron microscope investigation) were isolated from the plants collected in two locations. Additionally, as a part of specialized metabolites, total polyphenols, total tannins, total flavonoids and total phenolic acids were determined spectrophotometrically. In the lipophilic volatile fractions-essential oils, the most abundant compounds identified were hexahydrofarnesyl acetone, caryophyllene oxide and hexadecanoic acid. In total, the class of oxygenated sesquiterpenes and the group of fatty aldehydes, acids and alcoholic compounds dominated in the essential oils. In the hydrophilic volatile fractions-hydrosols, the most abundant compounds identified were trans-p-mentha-1(7),8-dien-2-ol, allo-aromadendrene and (E)-caryophyllene. A group of oxygenated monoterpenes and the sesquiterpene hydrocarbons dominated in the hydrosols. Antioxidant activity of essential oils and hydrosols was tested with two methods: 2,2′-diphenyl-1-picrylhydrazyl (DPPH) and oxygen radical absorbance capacity (ORAC). Essential oils showed higher antioxidant activity than hydrosols and showed similar antioxidant activity to Rosmarinus officinalis essential oil. Obtained results demonstrate that this genus is a potential source of volatiles with antioxidant activity.

scholarly journals Free Volatile Compounds of Veronica austriaca ssp. jacquinii (Baumg.) Eb. Fisch. and Their Biological Activity

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2529
Author(s):  
Marija Nazlić ◽  
Željana Fredotović ◽  
Elma Vuko ◽  
Nenad Vuletić ◽  
Ivica Ljubenkov ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Essential Oils ◽  
Volatile Compounds ◽  
Glandular Trichomes ◽  
Principal Component ◽  
Stalk Cell ◽  
Total Phenolic ◽  
Dpph Method ◽  
Hexahydrofarnesyl Acetone ◽  
Different Types

The composition of free volatile compounds of essential oils (EO) and hydrosols (Hy) from four different localities of the species Veronica austriaca ssp. jacquinii (Baumg.) Eb. Fisch. were analyzed by gas chromatography coupled with mass spectrometry. In the EOs, the most abundant compounds identified were hexahydrofarnesyl acetone (23.34–52.56%), hexadecanoic acid (palmitic acid, 26.71–58.91%) and octadecanol acetate (0–6.24%). The hydrosols were characterized by high abundance of methyl eugenol (23.35–57.93%), trans-p-mentha-1(7),8-dien-2-ol (5.24–7.69%) and thymol (3.48–9.45%). Glandular trichomes were analyzed using SEM (Scanning Electron Microscopy), as they are the sites of synthesis of free volatile compounds. We have detected glandular trichomes, consisting of a one stalk cell and two elliptically shaped head cells, and non-glandular (unbranched, bi-cellular to multicellular) trichomes on stems, leaves and the sepals. Data for volatile compounds from EOs and hydrosols were analyzed using Principal Component Analyses (PCA) to demonstrate variations in the composition of the volatile compounds identified. Isolated samples of EO and hydrosols were analyzed for their antioxidant activity using two methods, DPPH (2,2-diphenyl-1-picrylhydrazyl) and ORAC (Oxygen Radical Absorbance Capacity). The essential oils showed higher antioxidant activity than the hydrosols in ORAC method, but lower activity by the DPPH method. The isolates were also tested for their antiproliferative activity on different types of cancer cells and also on two lines of healthy cells, and the results showed that the extracts were not toxic to the cell lines tested. Total polyphenols, total tannins, total flavonoids and total phenolic acids were also analyzed and determined spectrophotometrically. The free volatile compounds of Veronica austriaca ssp. jacquinii can be considered as a safe natural product.

scholarly journals Volatile Organic Compounds of the Glandular Trichomes of Ocimum basilicum and Artifacts during the Distillation of the Leaves

2021 ◽  
Vol 11 (16) ◽  
pp. 7312
Author(s):  
Bruno Tirillini ◽  
Filippo Maggi
Keyword(s):  
Volatile Organic Compounds ◽  
Essential Oil ◽  
Volatile Compounds ◽  
Organic Compounds ◽  
Glandular Trichomes ◽  
Ocimum Basilicum ◽  
Chemical Compositions ◽  
Capitate Trichomes ◽  
Volatile Organic ◽  
Main Components

Focusing on volatile organic compounds (VOC) of Ocimum basilicum, this study aims to determine the chemical composition of VOC in secretory trichomes and compare it with that of essential oil obtained by hydrodistillation of leaves. The technique of extracting the content of glandular trichomes refers to the microneedle shuttle analysis. Hydrodistillation of fresh leaves was done with a Clevenger distiller (EO). The chemical compositions were determined by GC/FID and GC/MS. The head of the capitate trichomes does not contain volatile compounds. Fifty volatile compounds were detected in the EO, and twenty-four volatile compounds were detected in the VOC; the main components were eugenol (from 15.47% ± 1.05% to 41.89% ± 2.83%) and linalool (from 32.05% ± 2.57% to 28.99% ± 2.32%), respectively. During the distillation of the basil leaves 26 artifacts are formed. The composition of the essential oil of O. basilicum therefore depends not only on the plant but also on the method used to obtain it.

scholarly journals Identification of the Volatile Compounds and Observation of the Glandular Trichomes in Opisthopappus taihangensis and Four Species of Chrysanthemum

Plants ◽  
2020 ◽  
Vol 9 (7) ◽  
pp. 855
Author(s):  
Yanhong Guo ◽  
Tengxun Zhang ◽  
Jian Zhong ◽  
Tingting Ba ◽  
Ting Xu ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Solid Phase ◽  
Glandular Trichomes ◽  
Histochemical Staining ◽  
Gas Chromatography Mass Spectrometry ◽  
Leaf Epidermis ◽  
Leaf Volatiles ◽  
Capitate Trichomes ◽  
Opisthopappus Taihangensis ◽  
The Relationship

Opisthopappus taihangensis (Ling) Shih, a wild relative germplasm of chrysanthemum, releases a completely different fragrance from chrysanthemum species. We aimed to identify the volatile compounds of the leaves of O. taihangensis and four other Chrysanthemum species using headspace solid-phase micro-extraction combined with gas chromatography-mass spectrometry (HS-SPME-GC/MS). In total, 70 compounds were detected, and terpenoids accounted for the largest percentage in these five species. Many specific compounds were only emitted from O. taihangensis and not from the other four species. In particular, 1,8-cineole could be responsible for the special leaf fragrance of O. taihangensis as it accounted for the largest proportion of the compounds in O. taihangensis but a small or no proportion at all in other species. The glandular trichomes (GTs) in the leaves are the main organs responsible for the emission of volatiles. To explore the relationship between the emissions and the density of the GTs on the leaf epidermis, the shape and density of the GTs were observed and calculated, respectively. The results showed that the trichomes have two shapes in these leaves: T-shaped non-glandular trichomes and capitate trichomes. Histochemical staining analyses indicated that terpenoids are mainly emitted from capitate glandular trichomes. Correlation analysis showed that the volatile amount of terpenoids is highly related to the density of capitate trichomes. In O. taihangensis, the terpenoids content and density of capitate trichomes are the highest. We identified the diversity of leaf volatiles from O. taihangensis and four other Chrysanthemum species and found a possible relationship between the content of volatile compounds and the density of capitate trichomes, which explained the cause of the fragrance of O. taihangensis leaves.

Glandular trichomes as an inflorescence defence mechanism against insect herbivores in Iberian columbines

Oecologia ◽  
2012 ◽  
Vol 172 (4) ◽  
pp. 1051-1060 ◽  
Author(s):  
Rafael Jaime ◽  
Pedro J. Rey ◽  
Julio M. Alcántara ◽  
Jesús M. Bastida
Keyword(s):  
Glandular Trichomes ◽  
Insect Herbivores ◽  
Defence Mechanism

scholarly journals Wild Species Veronica officinalis L. and Veronica saturejoides Vis. ssp. saturejoides—Biological Potential of Free Volatiles

Horticulturae ◽  
2021 ◽  
Vol 7 (9) ◽  
pp. 295
Author(s):  
Marija Nazlić ◽  
Željana Fredotović ◽  
Elma Vuko ◽  
Lea Fabijanić ◽  
Dario Kremer ◽  
...  
Keyword(s):  
Traditional Medicine ◽  
Volatile Compounds ◽  
Antioxidant Activities ◽  
Glandular Trichomes ◽  
Biologically Active ◽  
Caryophyllene Oxide ◽  
Hexadecanoic Acid ◽  
Endemic Plant ◽  
Future Studies ◽  
Biological Potential

Extracts from plants of the genus Veronica have been and continue to be used in traditional medicine to treat various diseases throughout the world. Although often considered a weed, many scientific reports demonstrate that these plants are a source of valuable biologically active compounds and their potential for horticulture should be investigated and considered. In this study, free volatile compounds of essential oils (EO) and hydrosols were extracted from two species: Veronica officinalis, which is most commonly used in traditional medicine, and Veronica saturejoides, an endemic plant that could be obtained by cultivation in horticulture. Volatiles were analyzed by gas chromatography coupled with mass spectrometry (GC, GC-MS). The most abundant compounds identified in the EOs were hexadecanoic acid in V. officinalis EO and caryophyllene oxide in V. saturejoides EO. The hydrosols were characterized by a high abundance of caryophyllene oxide in V. saturejoides hydrosol and of p-vinyl guaiacol for V. officinalis hydrosol. The sites where the volatile compounds are synthesized and stored were analyzed using SEM (Scanning Electron Microscopy); glandular and non-glandular trichomes were detected on stems, leaves and the calyx. Further, to investigate the activity of the free volatile compounds against pathogens, isolated volatile compounds were tested on the antiphytoviral activity against tobacco mosaic virus (TMV) infection. The hydrosols of both investigated species and EO of V. officinalis showed significant antiphytoviral activity. To further investigate the biological potential of these extracts they were also tested for their antiproliferative and antioxidant activities. The results indicate that these compounds are a valuable source of potential anticancerogenic agents that should be investigated in future studies. The presented results are the first report of hydrosol and EO activity against TMV infection, suggesting that these extracts from Veronica species may be useful as natural-based antiphytoviral agents.

Plants on early alert: glandular trichomes as sensors for insect herbivores

2009 ◽  
Vol 184 (3) ◽  
pp. 644-656 ◽  
Author(s):  
Michelle Peiffer ◽  
John F. Tooker ◽  
Dawn S. Luthe ◽  
Gary W. Felton
Keyword(s):  
Glandular Trichomes ◽  
Insect Herbivores ◽  
Early Alert

scholarly journals Non-glandular trichomes of Solanum carolinense deter feeding by Manduca sexta caterpillars and cause damage to the gut peritrophic matrix

2017 ◽  
Vol 284 (1849) ◽  
pp. 20162323 ◽  
Author(s):  
Rupesh R. Kariyat ◽  
Jason D. Smith ◽  
Andrew G. Stephenson ◽  
Consuelo M. De Moraes ◽  
Mark C. Mescher
Keyword(s):  
Manduca Sexta ◽  
Glandular Trichomes ◽  
Peritrophic Membrane ◽  
Insect Herbivores ◽  
Peritrophic Matrix ◽  
First Line ◽  
Solanum Carolinense ◽  
Physical Barriers ◽  
Electron And Light Microscopy ◽  
Direct Toxicity

Plant trichomes constitute a first line of defence against insect herbivores. The pre- and post-ingestive defensive functions of glandular trichomes are well documented and include direct toxicity, adhesion, antinutrition and defence gene induction. By contrast, the defensive functions of non-glandular trichomes are less well characterized, although these structures are thought to serve as physical barriers that impede herbivore feeding and movement. We experimentally varied the density of stellate non-glandular trichomes in several ways to explore their pre- and post-ingestive effects on herbivores. Larvae of Manduca sexta (Sphingidae) initiated feeding faster and gained more weight on Solanum carolinense (Solanaceae) leaves having lower trichome densities (or experimentally removed trichomes) than on leaves having higher trichome densities. Adding trichomes to artificial diet also deterred feeding and adversely affected caterpillar growth relative to controls. Scanning electron and light microscopy revealed that the ingestion of stellate trichomes by M. sexta caterpillars caused extensive damage to the peritrophic membrane, a gut lining that is essential to digestion and pathogen isolation. These findings suggest that, in addition to acting as a physical barrier to deter feeding, trichomes can inhibit caterpillar growth and development via post-ingestive effects.

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