A hydrocarbon that is widespread in Juniperus foliage was isolated from Juniperus erectopatens (Cheng and L. K. Fu) R. P. Adams and identified as (E,E,E)-1,7-dimethylcyclodeca-1,4,7-triene (pregeijerene B). Geometry of the disubstituted double bond was determined by IR and NMR spectroscopy, while that of the trisubstituted double bonds was proven by comparison of the products of selective hydro...

The essential oil from the dried leaves of Chromolaena odorata (L.) R.M. King & H. Rob. was obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry (GC-MS). The major components were α-pinene (42.2%), β-pinene (10.6%), germacrene D (9.7%), β-copaen-4α-ol (9.4%), (E)caryophyllene (5.4%), and geijerene/pregeijerene (7.5%). The oil was screened for antimicrobial activity...

While the role of herbivore-induced volatiles in plant-herbivore-natural enemy interactions is well documented aboveground, new evidence suggests that belowground volatile emissions can protect plants by attracting entomopathogenic nematodes (EPNs). However, due to methodological limitations, no study has previously detected belowground herbivore-induced volatiles in the field or quantified the...

Plants can defend themselves against herbivores through activation of defensive pathways and attraction of third-trophic-level predators and parasites. Trophic cascades that mediate interactions in the phytobiome are part of a larger dynamic including the pathogens of the plant itself, which are known to greatly influence plant defenses. As such, we investigated the impact of a phloem-limited b...

Heterotrophic cell suspension cultures of Ruta graveolens were established by reversion of photom ixotrophic cultures without any change in the chemical composition of the growth medium. The heterotrophic cultures were qualitatively and quantitatively analyzed by gaschromatography and mass spectroscopy for volatile compounds. The terpenoid hydrocarbons geijerene and pregeijerene, C6-C8 ketones,...

in this study, the aerial parts of pimpinella puberula were collected from ramhormoz and mashhad (khuzestan and khorasan provinces) at the vegetative, flowering and seeding stages. essential oils from the whole aerial parts as well as stem/leaf, inflorescence, unripe and ripe seeds, were isolated by hydro-distillation. the yields of essential oil obtained from the ramhormoz samples were 0.49%, ...

One of the most important aromatic plants is Pimpinella anisum. The genus Pimpinella contains 23 species that are found wild in different regions of Iran. Pimpinella eriocarpa is distributed in south and west of Iran. In this research, the oil composition of P. eriocarpa was studied. Essential oils were isolated by hydro-distillation from the arial parts and seeds of Pimpinella eriocarpa indivi...

One of the most important aromatic plants is Pimpinella anisum. The genus Pimpinella contains 23 species that are found wild in different regions of Iran. Pimpinella eriocarpa is distributed in south and west of Iran. In this research, the oil composition of P. eriocarpa was studied. Essential oils were isolated by hydro-distillation from the arial parts and seeds of Pimpinella eriocarpa indivi...