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 quite different. Maize seedlings were grown in a hydroponic culture for 6 days, and then coumarin (at concentrations of 0, 25, 100, and 400 microM) was added to the nutrient solution. Coumarin inhibited root length, but effects differed depending on the root type. C 1/2 values, representing the coumarin concentration causing a 50% inhibition of the root length, were calculated by nonlinear regression. Six, 1, and 0.25 mM coumarin were sufficient to reduce the radicle, seminal, and nodal root lengths by 50%, respectively. At the highest coumarin concentration, the subapical root zone showed swelling. The degree recorded by average diameter was higher in nodal roots than in seminal and radicle roots. Furthermore, coumarin decreased the number of lateral roots and branching density more in the seminal than in the radicle roots. These results suggest the following order of sensitivity to coumarin: nodal > seminal > radicle roots. The observed spatial effects of coumarin could be ecologically significant, since taprooted species could benefit at the disadvantage of fibrous-rooted species and could modify community composition.
journal_name
J Chem Ecoljournal_title
Journal of chemical ecologyauthors
Abenavoli MR,Sorgonà A,Albano S,Cacco Gdoi
10.1023/b:joec.0000042407.28560.bbkeywords:
subject
Has Abstractpub_date
2004-09-01 00:00:00pages
1871-83issue
9eissn
0098-0331issn
1573-1561journal_volume
30pub_type
杂志文章abstract：:The chemical components of tarbush (Flourensia cernua) leaves were fractionated by extracting successively with hexanes, diethyl ether, and ethanol. Volatile profiles of each fraction were identified by using GC-MS. The hexanes fraction contained mostly monoterpenoids, while the ethanol fraction volatiles were primari...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1023/a:1012283005014
更新日期：2001-11-01 00:00:00
abstract：:The foliage and fruit of the tomato plantLycopersicon esculentum contains polyphenol oxidases (PPO) and peroxidases (POD) that are compartmentally separated from orthodihydroxyphenolic substrates in situ. However, when leaf tissue is damaged by insect feeding, the enzyme and phenolic substrates come in contact, result...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF01014725
更新日期：1989-12-01 00:00:00
abstract：:The biological activity of aqueous extracts of velvetleaf (Abutilon theophrasti Medik.) seed coats and their flavonoid components against three plant species and five soil fungi was investigated. Aqueous extracts slightly inhibited germination and significantly inhibited radicle growth of all plant species tested. Fun...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF01012523
更新日期：1988-07-01 00:00:00
abstract：:We report the identification, synthesis, and field bioassays of a volatile, male-produced aggregation pheromone of a long-horned beetle, the banded alder borer, Rosalia funebris Mots. Headspace collections from males contained a major male-specific compound, (Z)-3-decenyl (E)-2-hexenoate, and several minor components,...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-008-9576-2
更新日期：2009-01-01 00:00:00
abstract：:Mutualistic associations such as the fungal farms of insects are prone to parasitism and are consequently vulnerable to attack by weeds and pests. Therefore, efficient farm management requires quick detection of weeds for their elimination. Furthermore, if the available weedicides are non-specific, then the ability of...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-017-0902-4
更新日期：2017-10-01 00:00:00
abstract：:Recently parasitoids were hypothesized to encounter a reliability-detectability problem relating to chemical stimuli from the first and second trophic level, when searching for hosts. The relative role of infochemicals originating from the host,Pieris brassicae (second trophic level), and its food plant, cabbage (firs...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF00987470
更新日期：1993-01-01 00:00:00
abstract：:A brief 2-hr experience with hostDrosophila larvae in artificial apple-yeast or mushroom microhabitats had three effects on the foraging behavior of femaleLeptopilina heterotoma (Hymenoptera: Eucoilidae) parasitoids under field conditions. First, experienced females released at the center of circular arrays of apple-y...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF00979616
更新日期：1990-11-01 00:00:00
abstract：:Volatile organic compounds derived from non-host plants, Ocimum basilicum, Rosmarinus officinalis, Corymbia citriodora, and Ruta graveolens, can be used to mask host plant odors, and are repellent to the tea geometrid, Ectropis obliqua. Volatile compounds were collected by headspace absorption, and the components were...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-013-0344-6
更新日期：2013-10-01 00:00:00
abstract：:Alate and apterous virginoparae ofAphis fabae Scop, and alate virginoparae ofBrevicoryne brassicae (L.), walking in a linear track olfactometer, were attracted by odor from leaves of their host plants.A. fabae responded to odor from undamaged but not damaged bean leaves. Gynoparae (autumn migrants) ofA. fabae, however...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF01402946
更新日期：1991-06-01 00:00:00
abstract：:Responses ofRhagoletis pomonella (Walsh) (Diptera: Tephritidae) flies to host fruit visual stimuli (apples or models of apples) and chemical stimuli (synthetic apple volatile blend) were studied in semidwarf field-caged apple trees. Three different fruit or model densities (1, 4, or 16 fruit or models/ tree) and two o...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF00980700
更新日期：1993-11-01 00:00:00
abstract：:The rice stalk stink bug, Tibraca limbativentris, is an important rice pest in Brazil with a high invasive potential for Mexico and the USA. The sex pheromone of this species was previously identified as a combination of two stereoisomers of 1,10-bisaboladien-3-ol (zingiberenol), but the absolute configurations of the...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-019-01125-w
更新日期：2020-01-01 00:00:00
abstract：:Tree volatiles and pheromones produced by southern bark beetles were bioassayed for response by the clerid predatorThanasimus dubius (F.). Upwind flights in a laboratory olfactometer, modified from Visser (1976), were used to determine the attractiveness of compounds. Differences in response to a solvent control and p...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF00987655
更新日期：1984-01-01 00:00:00
abstract：:Attraction of (2E,4E,6R,10R)-4,6,10,12-tetramethyl-2,4-tridecadien-7-one [1; (6R,10R)-matsuone] and its antipode [2; (6S,10S)-matsuone] toMatsucoccus thunbergianae males was studied in the laboratory and in the field. They showed stronger response to1. In laboratory bioassays, the threshold concentrations for male att...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF02033196
更新日期：1994-09-01 00:00:00
abstract：:Coupled gas chromatographic (GC)-electroantennographic detection (EAD) analyses of ovipositor extract of calling Hessian fly, Mayetiola destructor, females revealed that seven compounds elicited responses from male antennae. Four of the compounds-(2S)-tridec-2-yl acetate, (2S,10Z)-10-tridecen-2-yl acetate, (2S,10E)-10...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-008-9569-1
更新日期：2009-01-01 00:00:00
abstract：:In field tests synthetic (3E,5Z)-3,5-tetradecadienyl acetate was found to attract large numbers of males ofRecurvaria leucatella Clerck into sticky traps. The other geometrical isomers did not influence catches. Of the corresponding monoenic compounds, (3E)-3-tetradecenyl acetate was highly attractive to a close relat...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF00980065
更新日期：1992-07-01 00:00:00
abstract：:(Z)-5-Tetradecenyl acetate and tetradecyl acetate were identified as sex pheromone components of an unnamedPlanotortrix leafroller moth species found onAvicennia resinifera (mangrove). An equal mixture of the two compounds used as bait gave field trap catches at least as good as those baited with caged virgin females....
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF01880105
更新日期：1987-03-01 00:00:00
abstract：:The European rabbit (Oryctolagus cuniculus) uses the secretion of the chin gland to maintain dominance hierarchies in the wild. Recent work has investigated changes in the secretion when social status is manipulated in the rabbit. When a rabbit becomes dominant, a new compound appears in his secretion, 2-phenoxyethano...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1023/a:1023836319677
更新日期：2003-05-01 00:00:00
abstract：:The feasibility of using the synthetic sex pheromone, disparlure, as a mating confusant of the nun moth (Lymantria monacha L.) was investigated on wild populations occurring in outbreak proportions in Poland and in low density in Czechoslovakia. The size of experimental plots ranged from 1 to 12 hectares. The amounts ...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF01013905
更新日期：1988-02-01 00:00:00
abstract：:Artemisinin, a sesquiterpene lactone produced in the leaves ofArtemisia annua, was evaluated for its phytotoxicity in mono- and dicotyledonous plants. Artemisinin inhibited seed germination, seedling growth, and root induction in all species tested. The concentration of artemisinin required for 50% inhibition ofLemna ...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF01020500
更新日期：1990-06-01 00:00:00
abstract：:The chemical quality of forage may determine landscape use and habitat quality for some herbivorous species. However, studies that investigate the relationship between foliar chemistry and foraging choices in wild vertebrates are rare. Petauroides volans (the greater glider) is unique among Australian marsupial folivo...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-010-9889-9
更新日期：2011-01-01 00:00:00
abstract：:The evolution of male moth responses to pheromone blends may be constrained by a trade-off between two response traits: sensitivity and breadth of response. Population genetic simulations predict that if sensitivity and breadth of response are negatively correlated (i.e., a trade-off exists), then selection will favor...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-008-9546-8
更新日期：2008-11-01 00:00:00
abstract：:Locoweeds are Astragalus and Oxytropis species that contain the toxic alkaloid swainsonine. Swainsonine accumulates in all parts of the plant with the highest concentrations found in the above ground parts. A fungal endophyte, Undifilum oxytropis, found in locoweed plant species, is responsible for the synthesis of sw...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-009-9710-9
更新日期：2009-10-01 00:00:00
abstract：:Brook charr (Salvelinus fontinalis) lay their eggs in gravel nests called redds. The nests are not defended for extended periods and the eggs and young may be subject to predation from predators that travel through the substrate into the redd. In this study we tested whether long-term exposure of brook charr eggs to c...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1023/a:1010404624556
更新日期：2001-09-01 00:00:00
abstract：:Male pink bollworm,Pectinophora gossypiella, were tested in a sustained flight tunnel to 119 blend-dosage combinations of the sex pheromone components, (Z,Z)- and (Z,E)-7,11-hexadecadienyl acetates, which are released by conspecific females in a 61∶39 ratio. Hierarchical cluster analysis was used to define an area of ...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF01012203
更新日期：1985-11-01 00:00:00
abstract：:Phorodon humuli (Damson-hop aphid) is one of the major pests of hops in the northern hemisphere. It causes significant yield losses and reduces hop quality and economic value. Damson-hop aphid is currently controlled with insecticides, but the number of approved pesticides is steadily decreasing. In addition, the use ...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-018-0980-y
更新日期：2018-08-01 00:00:00
abstract：:Several experiments have been conducted at the University of Illinois, Urbana, Illinois, to determine the role of allelopathic (autotoxicity) effects of alfalfa (Medicago sativa L.) on the establishment of alfalfa. By means of correcting any soil fertility differences and protecting the alfalfa seedlings from fungal a...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF00982211
更新日期：1983-08-01 00:00:00
abstract：:The tea shot-hole borer beetle (TSHB, Euwallacea fornicatus) causes serious damage in plantations of tea, Camellia sinensis var. assamica, in Sri Lanka and South India. TSHB is found in symbiotic association with the ambrosia fungus, Monacrosporium ambrosium (syn. Fusarium ambrosium), in galleries located within stems...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-017-0913-1
更新日期：2018-01-01 00:00:00
abstract：:HPLC analysis of crude dichloromethane extracts of shaken liquid cultures of the hyphomycetous fungusTolypocladium geodes Gams revealed the presence of efrapeptins. These peptides, which have mitochondrial ATPase inhibitory activity as well as antifungal and insecticidal properties, are previously known only from the ...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/BF00992580
更新日期：1991-10-01 00:00:00
abstract：:Defensive mutualism is widely accepted as providing the best framework for understanding how seed-transmitted, alkaloid producing fungal endophytes of grasses are maintained in many host populations. Here, we first briefly review current knowledge of bioactive alkaloids produced by systemic grass-endophytes. New findi...
journal_title：Journal of chemical ecology
pub_type： 杂志文章,评审
doi：10.1007/s10886-013-0310-3
更新日期：2013-07-01 00:00:00
abstract：:Fertilizer effects on terpene production have been noted in numerous reports. In contrast, only a few studies have studied the response of leaf terpene content to naturally different soil fertility levels. Terpene content, as determined by gas chromatography/mass spectrometry/flame ionization detector, and growth of P...
journal_title：Journal of chemical ecology
pub_type： 杂志文章
doi：10.1007/s10886-008-9515-2
更新日期：2008-09-01 00:00:00
