Simulated herbivory limits phenotypic responses to drought in Convolvulus demissus Choisy [Convolvulaceae]

• Autorzy: Quezada I M , Gianoli E.
• Języki publikacji: EN

Abstrakty

EN

Drought and herbivory are important stress factors for plants. When plants are subjected to any form of stress, phenotypic responses are elicited to reduce damage. Responses to drought include a decrease in leaf area and aerial biomass, and an increase in root/shoot ratio of biomass allocation. If plants are subjected to drought and herbivory at the same time, constrained responses are expected due to resource limitation. In a greenhouse experiment we analyzed the effect of simulated herbivory on the ability to respond to drought stress in seedlings of the Chilean perennial herb Convolvulus demissus (Convolvulaceae), which in natural populations may experience water deficit during dry summers as well as grazing by mammals. Plants subjected to drought showed the phenotypic responses theoretically expected. In contrast, plants subjected to a combined drought + herbivory treatment did not show those responses, being phenotypically similar to control plants. It is suggested that herbivory may limit responses to drought in C. demissus, hence magnifying the negative consequences on plant fitness of such abiotic factor.

Słowa kluczowe

EN

Convolvulus demissus; herb; phenotypic response; stress factor; herbivore; Chilean perennial herb; drought; plant stress; resource availability; phenotypic plasticity; water deficit; Convolvulaceae

• Wydawca: -
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2006
• Tom: 54
• Numer: 3
• Opis fizyczny: p.499-503,fig.,ref.

Twórcy

autor

Quezada I M

• University of Concepcion, Casilla 160-C, Concepcion, Chile

autor

Gianoli E.

Bibliografia

• Arroyo M.T., Armesto J.J., Villagrán C. 1981 – Plant phenological patterns in the high andean cordillera of central Chile – J. Ecol. 69: 205–223.
• Coughenour M.B. 1985 – Graminoid responses to grazing by large herbivores: Adaptations, exaptations, and interacting processes – Ann. Miss. Bot. Gar. 72: 852–863.
• Ehrlén J. 2003 – Fitness components versus total demographic effects: Evaluating herbivore impacts on a perennial herb – Am. Nat. 162: 796–810.
• Gianoli E. 2004 – Plasticity of traits and correlations in two populations of Convolvulus arvensis (Convolvulaceae) differing in environmental heterogeneity – Int. Jour. Plant Sci. 165: 825–832.
• Gianoli E., González-Teuber M. 2005 – Environmental heterogeneity and population differentiation in plasticity to drought in Convolvulus chilensis (Convolvulaceae) – Evol. Ecol. 19: 603–613.
• González A.V., Gianoli E. 2004 – Morphological plasticity in response to shading in three Convolvulus species of different ecological breadth – Acta Oecol. 26: 185–190.
• Grace J. 1997 – Plant water relations (In: Plant Ecology, Ed. M.J. Crawley) – Blackwell Science, Oxford, England, pp. 28–50.
• Gurevitch J., Scheiner S.M., Fox G.A. 2002 – Herbivory and plant-pathogen interactions. (In: The ecology of plants, Eds. J. Gurevitch, S.M. Scheiner, G.A. Fox) – Sinauer Associates, Massachusetts, USA, pp. 213–234.
• Houle G., Simard G. 1996 – Additive effects of genotype, nutrient availability and type of tissue damage on the compensatory response of Salix planifolia ssp. planifolia to simulated herbivory – Oecologia, 107: 373–378.
• Karban R., Strauss S.Y. 1993 – Effects of herbivores on growth and reproduction of their perennial host, Erigeron glaucus – Ecology, 74: 39–46.
• Kurashige N.S., Agrawal A.A. 2005 – Phenotypic plasticity to light competition and herbivory in Chenopodium album – Am. J. Bot. 92: 21–26.
• Larsson S. 1989 – Stressful times for the plant stress-insect performance hypothesis – Oikos, 56: 277–283.
• Levine M.T., Paige K.N. 2004 – Direct and indirect effects of drought on compensation following herbivory in scarlet gilia – Ecology, 85: 3185–3191.
• Maldonado C., Squeo F., Ibacache E. 2003 – Phenotypic response of Lycopersicon chilense to water deficit – Rev. Chil. Hist. Nat. 76: 129–137.
• Mattson W.J., Haack R.A. 1987 – The role of drought in outbreaks of plant-eating insects – BioScience, 37: 110–118.
• O’Donell C.A. 1957 – Convolvuloideas chilenas – Bol. Soc. Arg. Bot. 6: 143–184 (in Spanish).
• Pedrol N., Ramos P., Reigosa M.J. 2000 – Phenotypic plasticity and acclimation to water deficits in velvet-grass: A long-term greenhouse experiment. Changes in leaf morphology, photosynthesis and stress-induced metabolites – J. Plant Physiol. 157: 383–393.
• Poiani A., Del Pozo A. 1986 – Efectos de la defoliación experimental sobre la producción de semillas y el crecimiento de Colliguaya odorifera Mol., Euphorbiaceae – Rev. Chil. Hist. Nat. 59: 39–45 (in Spanish with abstract in English).
• Simms E.L., Triplett J.K. 1994 – Costs and benefits of plant responses to disease: resistance and tolerance – Evolution, 48:1973–1985.
• Stowe K.A., Marquis R.J., Hochwender C.G., Simms E.L. 2000 – The evolutionary ecology of tolerance to consumer damage – Annu. Rev. Ecol. Syst. 31: 565–595.
• Tiffin P. 2000 – Mechanisms of tolerance to herbivore damage: what do we know? – Evol. Ecol. 14: 523–536.
• Tiffin P., Inouye B.D. 2000 – Measuring tolerance to herbivory: accuracy and precision of estimates made using natural versus imposed damage – Evolution, 54: 1024–1029.