Almeida-CortezShipleyArnason2003

Référence

Almeida-Cortez, J.S., Shipley, B., Arnason, J.T. (2003) Effects of nutrient availability on the production of pentaynene, a secondary compound related to defense, in Rudbeckia hirta. Plant Species Biology, 18(2-3):85-89.

Résumé

This study focused on the effect of different availabilities of mineral resources in hydroponic culture on the production of polyacetylenic defences of Rudbeckia hirta L. Specifically, we investigated if there was any difference concerning the amount of pentaynene, measured with high performance liquid chromatography (HPLC), produced in flowers of plants grown at high light intensity (500 ?mol m-2 s-1 photosynthetic photon flux density) and two levels of mineral resources (full strength and 1/5 dilution) in a hydroponic solution. A working hypothesis was that the concentration of secondary compounds would increase with decreasing nutrient supply, in accordance with the carbon:nutrient balance hypothesis. The amount of pentaynene produced in the flowers of R. hirta decreased with increasing flower age but increased significantly when the plant was subjected to a reduced nutrient availability. The decrease in pentaynene concentrations with flower age was also less pronounced in the nutrient-stressed plants.

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@ARTICLE { Almeida-CortezShipleyArnason2003,
    AUTHOR = { Almeida-Cortez, J.S. and Shipley, B. and Arnason, J.T. },
    TITLE = { Effects of nutrient availability on the production of pentaynene, a secondary compound related to defense, in Rudbeckia hirta },
    JOURNAL = { Plant Species Biology },
    YEAR = { 2003 },
    VOLUME = { 18 },
    PAGES = { 85-89 },
    NUMBER = { 2-3 },
    NOTE = { 0913557X (ISSN) Export Date: 26 April 2007 Source: Scopus CODEN: PSBIE Language of Original Document: English Correspondence Address: Shipley, B.; De?partement de Biologie; Universite? de Sherbrooke Sherbrooke, Que. J1K 2R, Canada; email: bill.shipley@usherbrooke.ca References: Almeida-Cortez, J.S., (1997) La Relation Entre l'Allocation aux Compose?s Secondaires et le taux de Croissance Relatif Chez les Asterace?es, , PhD Thesis, Universite? de Sherbrooke, Sherbrooke, Quebec, Canada; Almeida-Cortez, J.S., Shipley, B., Arnason, J.T., Do plant species with high relative growth rates have poorer chemical defences? (1999) Functional Ecology, 13, pp. 819-827; Almeida-Cortez, J.S., Shipley, B., Arnason, J.T., Growth and chemical defense in relation to resource availability: Tradeoffs or common responses to environmental stress? (2003) Brazilian Journal of Biology, 64. , in press; Bohlmann, F., Naturally-occurring acetylenes (1988) Chemistry and Biology of Naturally-Occurring Acetylenes and Related Compounds (NOARC), pp. 1-19. , Lam J., Breteler H., Arnason T. \& Hansen L. (eds). Elsevier, New York; Bryant, J.P., Chapin III, F.S., Klein, D.R., Carbon/nutrient balance of boreal plants in relation to vertebrate herbivory (1983) Oikos, 40, pp. 357-368; Camm, E.L., Towers, G.H.N., Mitchell, J.C., UV-mediated antibiotic activity of some compositae species (1975) Phytochemistry, 14, pp. 2007-2011; Coley, P.D., Bryant, J.P., Chapin III, F.S., Resource availability and plant antiherbivore defense (1985) Science, 230, pp. 895-899; Crankswan, D.R., Langenheim, J.H., Variation in terpenes and phenolics through leaf development in Hymenaea and its possible significance to herbivory (1981) Biochemical and Systematic Ecology, 9, pp. 115-124; Guillet, G., Lavigne, M.E., Philogene, B.J.R., Arnason, J.T., Behavioral adaptation of two phytophagous insects feeding on two species of phototoxic Asteraceae (1995) Journal of Insect Behavior, 8, pp. 533-546; Guillet, G., Philogene, B.J.R., O'Meara, J., Durst, T., Arnason, J.T., Multiple modes of insecticidal action of three classes of polyacetylene derivatives from Rudbeckia hirta (Asteraceae) (1997) Phytochemistry, 46, pp. 495-498; Heywood, V.H., Harbone, V.H., Turner, B.L., (1977) The Biology and Chemistry of the Compositae, 1. , Academic Press, New York; Hoagland, D.R., Arnon, D.I., (1950) The Water Culture Method of Growing Plants Without Soil, , California Agricultural Experiment Station, Circular no. 347, University of California, Berkly, CA; Janzen, D.H., Tropical blackwater rivers, animals, and mast fruiting by the Dipterocarpaceae (1974) Biotropica, 6, pp. 69-103; McKey, D., Waterman, P.G., Mbi, C.N., Gartlan, J.S., Struhsaker, T.T., Phenolic content of vegetation in two African rain forests: Ecological implications (1978) Science, 202, pp. 61-63; Meziane, D., Shipley, B., Interacting determinants of specific leaf area in 22 herbaceous species: Effects of irradiance and nutrient availability (1999) Plant, Cell and Environment, 22, pp. 447-459; Mihaliak, C.A., Lincoln, D.E., Growth pattern and carbon allocation to volatile leaf terpenes under nitrogen-limiting conditions in Heterotheca subaxillaris (Asteraceae) (1985) Oecologia, 66, pp. 423-426; Mooney, H.A., Gulmon, S.L., Constraints on leaf structure and function in reference to herbivory (1982) Bioscience, 32, pp. 198-206; Zangerl, A.R., Berenbaum, M.R., Furanocoumarins in wild parsnip: Effects of photosynthetically active radiation, ultraviolet light, and nutrients (1987) Ecology, 68, pp. 516-520. },
    ABSTRACT = { This study focused on the effect of different availabilities of mineral resources in hydroponic culture on the production of polyacetylenic defences of Rudbeckia hirta L. Specifically, we investigated if there was any difference concerning the amount of pentaynene, measured with high performance liquid chromatography (HPLC), produced in flowers of plants grown at high light intensity (500 ?mol m-2 s-1 photosynthetic photon flux density) and two levels of mineral resources (full strength and 1/5 dilution) in a hydroponic solution. A working hypothesis was that the concentration of secondary compounds would increase with decreasing nutrient supply, in accordance with the carbon:nutrient balance hypothesis. The amount of pentaynene produced in the flowers of R. hirta decreased with increasing flower age but increased significantly when the plant was subjected to a reduced nutrient availability. The decrease in pentaynene concentrations with flower age was also less pronounced in the nutrient-stressed plants. },
    KEYWORDS = { Carbon/nutrient hypothesis Nutrient stress Pentaynene Plant defense Rudbeckia hirta Secondary compounds Rudbeckia hirta },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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