abstract：:We examined the role of phenolic compounds, and the enzymes peroxidase and polyphenol oxidase, in the expression of resistance of coffee plants to Leucoptera coffeella (Lepidoptera: Lyonetiidae). The concentrations of total soluble phenols and chlorogenic acid (5-caffeoylquinic acid), and the activities of the oxidati...

journal_title：Journal of chemical ecology

authors： Ramiro DA,Guerreiro-Filho O,Mazzafera P

更新日期：2006-09-01 00:00:00

abstract：:Recent studies have alerted us to the potential for conflicts between pathogen- and herbivore-induced plant defenses. The lack of studies on the induced chemical changes that simultaneous insect and pathogen attacks have on the host plant has become apparent. In the present study, we found that pepper plant volatile p...

journal_title：Journal of chemical ecology

authors： Cardoza YJ,Tumlinson JH

更新日期：2006-08-01 00:00:00

abstract：:The effect of brief pheromone exposures on responses of codling moth (Cydia pomonella L.) males was tested by flight-tunnel and electroantennogram (EAG) studies. Males were preexposed to pheromone for up to 3 min as they sat in release cages or for shorter times (a few seconds to several min) upon initiating flights o...

journal_title：Journal of chemical ecology

authors： Stelinski LL,Gut LJ,Miller JR

更新日期：2006-07-01 00:00:00

abstract：:Tannins, a diverse group of water-soluble phenolics with high affinity to proteins, are widely distributed in various parts of plants, and have negative effects in herbivores after ingestion. Some mammalian species are thought to counteract tannins by secreting tannin-binding salivary proteins (TBSPs). Several types o...

journal_title：Journal of chemical ecology

authors： Shimada T

更新日期：2006-06-01 00:00:00

abstract：:Mammalian scent marking is often associated with territorial defense. However, males and females may demonstrate different activity patterns and play different roles. Female mammals nurture the young during lactation, while males purportedly perform other tasks more frequently, such as territorial maintenance and defe...

journal_title：Journal of chemical ecology

authors： Rosell F,Thomsen LR

更新日期：2006-06-01 00:00:00

abstract：:The genetic nature of pheromone variation within species has rarely been studied, and never for male-produced long-range pheromones. Males from western North American populations of Ips pini produce predominantly (R)-(-)-ipsdienol, whereas those from eastern North American populations produce higher proportions of (S)...

journal_title：Journal of chemical ecology

authors： Domingue MJ,Starmer WT,Teale SA

更新日期：2006-05-01 00:00:00

abstract：:The subsocial tenebrionid Parastizopus armaticeps Pér. is parasitized by the closely related Eremostibes opacus Koch (Coleoptera: Tenebrionidae). We found that the pygidial defensive secretions of both species are similar and contain a mixture of 1,4-benzoquinones, 1-alkenes, and monoterpene hydrocarbons. The 1-alkene...

journal_title：Journal of chemical ecology

authors： Geiselhardt S,Szepat T,Rasa OA,Peschke K

更新日期：2006-04-01 00:00:00

abstract：:Hard clams, Mercenaria mercenaria, are sessile, filter-feeding organisms that are heavily preyed upon by blue crabs, which find their clam prey using chemical cues. Clams may evade blue crabs by reducing their pumping (feeding) behavior when a threat is perceived. The purpose of this study was to determine the type of...

journal_title：Journal of chemical ecology

authors： Smee DL,Weissburg MJ

更新日期：2006-03-01 00:00:00

abstract：:In spite of the importance of chemoreception in social organization and sexual selection of lizards, there is a lack of general knowledge on how the characteristics of chemical signals mediate these behaviors. Moreover, it is unknown which are the mechanisms that might confer honesty to the information provided by che...

journal_title：Journal of chemical ecology

authors： López P,Amo L,Martín J

更新日期：2006-02-01 00:00:00

abstract：:Plants that contain elevated foliar metal concentrations can be categorized as accumulators or, if the accumulation is extreme, hyperaccumulators. The defense hypothesis suggests that these plants may be defended against folivore attack, and recent research has indicated that metal concentrations at or below the accum...

journal_title：Journal of chemical ecology

authors： Jhee EM,Boyd RS,Eubanks MD

更新日期：2006-02-01 00:00:00

abstract：:The chemical composition of some volatile (2-heptanol) and nonvolatile constituents (a homologous 9-alkene/alkane series) of Mormolyca ringens flowers and Scaptotrigona sp. queen waxes (homologous 9-alkene/alkane series) and cephalic extracts (homologous series of 2-alkanols, including 2-heptanol) involved with the ps...

journal_title：Journal of chemical ecology

authors： Flach A,Marsaioli AJ,Singer RB,Amaral Mdo C,Menezes C,Kerr WE,Batista-Pereira LG,Corrêa AG

更新日期：2006-01-01 00:00:00

abstract：:The milfoil weevil Euhrychiopsis lecontei is a specialist aquatic herbivore that feeds, oviposits, and mates on the invasive freshwater macrophyte Myriophyllum spicatum. We characterized the weevil's preference for M. spicatum, and through bioassay-driven fractionation, isolated and identified two chemicals released b...

journal_title：Journal of chemical ecology

authors： Marko MD,Newman RM,Gleason FK

更新日期：2005-12-01 00:00:00

abstract：:The sex pheromone of the obscure mealybug, Pseudococcus viburni, consists of (1R*,2R*,3S*)-(2,3,4,4-tetramethylcyclopentyl)methyl acetate, the first example of a new monoterpenoid structural motif in which the two isoprene units forming the carbon skeleton are joined by 2'-2 and 3'-4 connections rather than the usual ...

journal_title：Journal of chemical ecology

authors： Millar JG,Midland SL,McElfresh JS,Daane KM

更新日期：2005-12-01 00:00:00

abstract：:We investigated postpollination changes in fragrance composition and emission rates, as well as pollinator discrimination in hand-pollinated flower heads of two thistle species: Canada thistle (Cirsium arvense) and sandhill thistle (C. repandum). Following pollination, neither species emitted any novel compounds that ...

journal_title：Journal of chemical ecology

authors： Theis N,Raguso RA

更新日期：2005-11-01 00:00:00

abstract：:Jasmonic acid (JA) is a key molecule initiating plant defensive responses to attack by pathogens and herbivores. This phytohormone is produced at sites of insect damage and is ingested by feeding insects, but its subsequent occurrence in insect tissues remains to be studied. We report the presence of JA in eggs and ne...

journal_title：Journal of chemical ecology

authors： Tooker JF,De Moraes CM

更新日期：2005-11-01 00:00:00

abstract：:Most snakes and lizards produce eggs with flexible shells that interact with the environment to maintain water balance. Geckos produce rigid eggshells that are independent of an external source of water and can be oviposited in more open, dryer locations. In this study, we analyzed and compared the amino acid composit...

journal_title：Journal of chemical ecology

authors： Sexton OJ,Bramble JE,Heisler IL,Phillips CA,Cox DL

更新日期：2005-10-01 00:00:00

abstract：:We investigated volatile infochemicals possibly involved in location of the generalist predatory mite Neoseiulus californicus to plants infested with spider mites in a Y-tube olfactometer. The predators significantly preferred volatiles from lima bean leaves infested with Tetranychus urticae to uninfested lima bean le...

journal_title：Journal of chemical ecology

authors： Shimoda T,Ozawa R,Sano K,Yano E,Takabayashi J

更新日期：2005-09-01 00:00:00

abstract：:Ageratum conyzoides L. weed often invades cultivated fields and reduces crop productivity in Southeast Asia and South China. However, intercropping this weed in citrus orchards may increase the population of predatory mite Amblyseius newsami, an effective natural enemy of citrus red mite Panonychus citri, and keep the...

journal_title：Journal of chemical ecology

authors： Kong C,Hu F,Xu X,Zhang M,Liang W

更新日期：2005-09-01 00:00:00

abstract：:Male-specific compounds, previously identified from Phyllotreta cruciferae and synthesized or isolated from natural sources, attracted both sexes of the beetle in field trials and therefore function as components of a male-produced aggregation pheromone. Six field experiments of 7 to 10 d duration each were conducted ...

journal_title：Journal of chemical ecology

authors： Soroka JJ,Bartelt RJ,Zilkowski BW,Cossé AA

更新日期：2005-08-01 00:00:00

abstract：:Ethanolic extract of aerial parts of Artemisia annua L. and artemisinin were evaluated as anti-insect products. In a feeding deterrence assay on Epilachna paenulata Germ (Coleoptera: Coccinellidae) larvae, complete feeding rejection was observed at an extract concentration of 1.5 mg/cm2 on pumpkin leaf tissue. The sam...

journal_title：Journal of chemical ecology

authors： Maggi ME,Mangeaud A,Carpinella MC,Ferrayoli CG,Valladares GR,Palacios SM

更新日期：2005-07-01 00:00:00

abstract：:Phytotoxicity-directed extraction and fractionation of the aerial parts of Mikania micrantha H.B.K. led to the isolation and identification of three sesquiterpenoids: dihydromikanolide, deoxymikanolide, and 2,3-epoxy-1-hydroxy-4,9-germacradiene-12,8:15,6-diolide. These sesquiterpenoids inhibited both germination and s...

journal_title：Journal of chemical ecology

authors： Shao H,Peng S,Wei X,Zhang D,Zhang C

更新日期：2005-07-01 00:00:00

abstract：:The Evolution of Increased Competitive Ability (EICA) hypothesis posits that invasive plants in introduced habitats with reduced herbivore pressure will evolve reduced levels of costly resistance traits. In light of this hypothesis, we examined the constitutive and inducible expression of five chemical defense traits ...

journal_title：Journal of chemical ecology

authors： Cipollini D,Mbagwu J,Barto K,Hillstrom C,Enright S

更新日期：2005-06-01 00:00:00

abstract：:Olfactometer bioassays showed that odors from mature Thyanta perditor males attracted females but not males. Furthermore, odors from females did not attract either sex, indicating that like other phytophagous pentatomid bugs, the males produce a sex pheromone. Attraction appeared to peak in late afternoon to evening. ...

journal_title：Journal of chemical ecology

authors： Moraes MC,Millar JG,Laumann RA,Sujii ER,Pires CS,Borges M

更新日期：2005-06-01 00:00:00

abstract：:Many parasitic wasps are attracted to volatiles that are released by plants when attacked by potential hosts. The attractiveness of these semiochemicals from damaged plants has been demonstrated in many tritrophic systems, but the physiological mechanisms underlying the insect responses are poorly understood. We recor...

journal_title：Journal of chemical ecology

authors： Gouinguené S,Pickett JA,Wadhams LJ,Birkett MA,Turlings TC

更新日期：2005-05-01 00:00:00

abstract：:We analyzed phenolic compounds and other elements in leaf extracts and compared morphology of three species of the Phytolaccaceae family found in South Korea. To test allelochemical effects of the three Phytolacca species, we also examined seed germination and dry weight of seedlings of Lactuca indica and Sonchus oler...

journal_title：Journal of chemical ecology

authors： Kim YO,Johnson JD,Lee EJ

更新日期：2005-05-01 00:00:00

abstract：:Three different methods for the culture of rumen microorganisms (Hungate's technique, the Hohenheim in vitro gas production method, and the semicontinuous rumen simulation technique) were employed to study the influence of various alkaloids (sparteine, lupanine, cytisine, atropine, quinidine, lobeline, harmaline, arec...

journal_title：Journal of chemical ecology

authors： Aguiar R,Wink M

更新日期：2005-04-01 00:00:00

abstract：:Headspace extracts obtained from agar plate cultures of two marine bacteria from the North Sea (Germany), Loktanella strain BIO-204 and Dinoroseobacter shibae strain DFL-27, were analyzed by GC-MS. Several gamma-lactones and one delta-lactone were identified, besides pyrazines and some sulfur compounds. The absolute c...

journal_title：Journal of chemical ecology

authors： Dickschat JS,Wagner-Döbler I,Schulz S

更新日期：2005-04-01 00:00:00

abstract：:We examined the interaction between host trees and fungi associated with a tree-killing bark beetle, Dendroctonus frontalis. We evaluated (1) the response of four Pinus species to fungal invasion and (2) the effects of plant secondary metabolites on primary growth of and secondary colonization of three consistent fung...

journal_title：Journal of chemical ecology

authors： Hofstetter RW,Mahfouz JB,Klepzig KD,Ayres MP

更新日期：2005-03-01 00:00:00

abstract：:Polydimethylsiloxane (PDMS) materials were used to quantify levels of the photosynthesis inhibitor sorgoleone in the undisturbed rhizosphere of sorghum plants. The materials used included stir bars coated with PDMS (stir bar sorptive extraction), technical grade optical fiber coated with a thin film of PDMS (matrix-so...

journal_title：Journal of chemical ecology

authors： Weidenhamer JD

更新日期：2005-02-01 00:00:00

abstract：:Various applications of a novel sampling procedure in chemical ecology are outlined. The stir bar extraction method features the analytical reproducibility needed in recording the analytical profiles of volatile and semivolatile components of biological mixtures. This methodology has been demonstrated here through the...

journal_title：Journal of chemical ecology

authors： Soini HA,Bruce KE,Wiesler D,David F,Sandra P,Novotny MV

更新日期：2005-02-01 00:00:00

abstract：:Many mammals and birds roll on or rub themselves with millipedes that discharge benzoquinones. Chemicals transferred from millipedes onto the integument of anointing animals are thought to deter ectoparasites. We tested the lone star tick, Amblyomma americanum (L.), for responses to three widespread components of mill...

journal_title：Journal of chemical ecology

authors： Carroll JF,Kramer M,Weldon PJ,Robbins RG

更新日期：2005-01-01 00:00:00

abstract：:Phlorotannins are ubiquitous secondary metabolites in brown algae that are phenotypically plastic and suggested to have multiple ecological roles. Traditionally, phlorotannins have been quantified as total soluble phlorotannins. Here, we modify a quantification procedure to measure, for the first time, the amount of c...

journal_title：Journal of chemical ecology

authors： Koivikko R,Loponen J,Honkanen T,Jormalainen V

更新日期：2005-01-01 00:00:00

abstract：:In crop plants, both mechanical damage and insect attack trigger rapid changes in gene transcription. We investigated whether insect herbivory differs from a general wound response, and if so, is the induction specific to the pest/host plant interaction? Herbivory by beet armyworm (BAW; Spodoptera exigua) caterpillars...

journal_title：Journal of chemical ecology

authors： Lawrence SD,Novak NG

更新日期：2004-12-01 00:00:00

abstract：:Pharmacophagy of methyl eugenol (ME)--a highly potent male attractant, by Bactrocera papayae results in the hydroxylation of ME to sex pheromonal components, 2-ally-4,5-dimethoxyphenol (DMP) and (E)-coniferyl alcohol (CF). These compounds, which are also male attractants, are then sequestered and stored in the rectal ...

journal_title：Journal of chemical ecology

authors： Hee AK,Tan KH

更新日期：2004-11-01 00:00:00

abstract：:We evaluated the effects of tannic acid and purified perrsimmon tannin on survival and reproduction of bean bugs, Riptortus clavatus.Feeding behavior of R. clavatus was also examined on sweet (cv. Fuyu) and astringent (cv. Chongdosi) persimmon fruits. Soluble tannin in sweet persimmon fruits decreased from 3% in early...

journal_title：Journal of chemical ecology

authors： Park CG,Lee KC,Lee DW,Choo HY,Albert PJ

更新日期：2004-11-01 00:00:00

abstract：:Calocedrus formosana Florin (Cupressaceae) is an endemic tree species in Taiwan; its timber is recognized for natural decay resistance. To examine the antitermitic and antifungal activities of leaf essential oil and its main constituents, C. formosana leaves were extracted and the essential oils analyzed by GC-MS. Bio...

journal_title：Journal of chemical ecology

authors： Cheng SS,Wu CL,Chang HT,Kao YT,Chang ST

更新日期：2004-10-01 00:00:00

abstract：:Given that the amplitude of diurnal temperature fluctuations has been decreasing, mainly via warmer night temperatures, we examined the effects of nighttime temperature on concentration of the catecholic phenolics chlorogenic acid and rutin in tomato plants. A two-factor design, with carbon dioxide (350 ppm and 700 pp...

journal_title：Journal of chemical ecology

authors： Bradfield M,Stamp N

更新日期：2004-09-01 00:00:00

abstract：:The effects of coumarin on the length, diameter, and branching density of different root types in maize seedlings (Zea mays L. cv. Cecilia) were investigated. The maize root system represents a useful model for morphological studies, as it consists of radicle, seminal, and nodal roots whose origin and development are ...

journal_title：Journal of chemical ecology

authors： Abenavoli MR,Sorgonà A,Albano S,Cacco G

更新日期：2004-09-01 00:00:00

abstract：:Traps baited with semiochemicals are often used to investigate the chemical ecology of scolytids and associated insects. One statistical problem frequently encountered in these studies are treatments that catch no insects and, thus, have zero mean and variance, such as blank or control traps. A second problem is the u...

journal_title：Journal of chemical ecology

authors： Reeve JD,Strom BL

更新日期：2004-08-01 00:00:00

abstract：:Behavioral bioassays have shown that volatile oviposition-deterring chemicals are present in the frass of Ostrinia zealis, O. furnacalis, O. scapulalis, and O. latipennis larvae fed on an artificial diet. These chemicals were extractable with acetone, and could be partitioned into a polar lipid fraction. This fraction...

journal_title：Journal of chemical ecology

authors： Li G,Ishikawa Y

更新日期：2004-07-01 00:00:00