Volatile organic compounds (VOCs) are expected to have an important role in plant adaptation to high temperatures. The impacts of increasing night-time temperature on daytime terpenoid emissions and related gene expression in silver birch (Betula pendula) and European aspen (Populus tremula) clones were studied. The plants were grown under five different night-time temperatures (6, 10, 14, 18, ...

Many plants have an indirect defense against herbivores by emitting volatiles that attract carnivorous enemies of the herbivores. In cucumber (Cucumis sativus) the production of carnivore attractants can be induced by herbivory or jasmonic acid spraying. From the leaves of cucumber plants with and without spider mite infestation, two subtractive cDNA libraries were made that were enriched in cD...

Pheromone binding proteins (PBPs) play an important role in olfaction of insects by transporting sex pheromones across the sensillum lymph to odorant receptors. To obtain a better understanding of the molecular basis between PBPs and semiochemicals, we have cloned, expressed, and purified two PBPs (CpunPBP2 and CpunPBP5) from the antennae of Conogethes punctiferalis. Fluorescence competitive bi...

The roots and rhizomes of Tanacetum parthenium (L.) Schulz. Bip. (Asteraceae), have been used in Iranian traditional medicine under the name of Aqhovan, as digestive and stomachic tonic. Composition of the essential oil, which was obtained from the root of T. parthenium collected from Karaj, was determined by gas chromatography, combined GC/MS and GC/IR. In total, 20 components (92% of essentia...

The roots and rhizomes of Tanacetum parthenium (L.) Schulz. Bip. (Asteraceae), have been used in Iranian traditional medicine under the name of Aqhovan, as digestive and stomachic tonic. Composition of the essential oil, which was obtained from the root of T. parthenium collected from Karaj, was determined by gas chromatography, combined GC/MS and GC/IR. In total, 20 components (92% of essentia...

ABSTRACT Rice blast caused by the Magnaporthe oryzae pathogen is a major disease in this crop, and may cause devastating losses. This study aimed to investigate profile of Waitea circinata mycorrhiza volatile compounds antagonism M. oryzae, under different growth periods temperatures, using completely randomized design. Volatile organic were extracted headspace solid phase microextraction analy...

The exotic wood-boring pest, emerald ash borer (EAB), Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), has been threatening North American ash (Fraxinus spp.) resources, this being recognized since its first detection in Michigan, USA and Ontario, Canada in 2002. Ash trees are killed by larval feeding in the cambial region, which results in disruption of photosynthate and nutrient trans...

Abstract. Biogenic volatile organic compounds (BVOCs) emitted by the forests are known to have strong impacts in atmosphere. However, lots of missing reactivity is found, especially forest air. Therefore better characterization sources and identification/quantification unknown reactive needed. While isoprene monoterpene (MT) emissions boreal needle trees been studied quite intensively, there mu...

HS-SPME-GC–MS analysis of the scent Dactylorhiza viridis revealed presence verbenone (28.86%), caryophyllene (25.67%), β-terpineol (9.48%), and δ-cadinene (6.94%). In romana β-ocimene (18.69%), pentadecane (18.40%), α-farnesene (14.65%), isopropyl 14-methylpentadecanoate (14.32%) were found. incarnata contained tetradecane (11.07%), (28.40%), hexadecane (19.53%), heptadecane (17.33%), α-cubenen...