Canopy height modifies Eryngium horridum emergence in a temperate grassland of Argentina

Authors

  • Bárbara Heguy Universidad Nacional de La Plata, Argentina
  • María Cristina Vecchio Universidad Nacional de La Plata, Argentina

Keywords:

grazing, weed control, seed dormancy, invasions, pineapple eryngium

Abstract

The aim of this work was to study the emergence behaviour of seeds of the rangeland weed Eryngium horridum Malme (“pineapple eryngium”) present in the soil bank of a temperate grassland in Argentina. In the district of Magdalena, before the natural dispersal of E. horridum seeds began (early February), six 50 x 150 cm plots were set up side by side at a site with high weed density; three plots were randomly selected to carry out the autumn measurements and the other three for the spring measurements. Each plot was divided into three 50 x 50 cm subplots and in early February they were randomly assigned to one of three treatments, two of which simulated grazing: a cutting height above ground of 5 cm, another of 30 cm and an uncut control of 50 cm. Grazing was avoided during the whole measurement period. Soil temperature at 5 cm depth was recorded. Weekly émergence (estimated as cotyledon emergence) was measured. Seeds that did not germinate in situ were collected from the top 5 cm of soil and incubated in a growth chamber at 20:30 °C (16:8 h/day) and a 8:16 h light/dark cycle. Viability was determined by tetrazolium tests. Data was transformed into arcsin√x and analyzed using one-way ANOVA and Tukey post-hoc tests (p < 0.05). Most in situ germination was recorded in the treatment with a 5-cm cutting height in April (autumn). With this treatment, 63 % of the total of seeds emerged, whereas with the intermediate canopy height only 13 % emerged and no emergence was recorded when the canopy remained uncut. Results suggest that in heavily infected plots grazing should be managed to maintain a high canopy in autumn in order to avoid conditions that may favour E. horridum emergence.

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References

Baskin, C.C., & J.M. Baskin. 1998. Seeds—Ecology, Biogeography and Evolution of Dormancy and germination. Academic Press, San Diego.

Benech Arnold, R. L., C. M. Ghersa, R. A. Sanchez, & A. E. García Fernandez. 1988. The role of fluctuanting temperatures in the germination and establishment of Sorghum halepense (L.) Pers. Regulation of germination under leaf canopies. Funcional Ecology. 2: 311-318.

Benech Arnold, R. L., R. A. Sanchez, F. Forcella, B. Kruk, and C. M. Ghersa. 2000. Environmental control of dormancy in weed soil seed banks. Fields Crops Research. 67: 105-122.

Bewley, J.D. & Black, M. 1994. Seeds. Physiology of Development and Germination. Pp. 1-33. ISBN 978-0-306-44748-8. Springer US.

Bullock J. M., B. Clear Hill, J. Silvertown, & M. Sutton . 1995. Gap colonization as a source of grassland community change: effects of gap size and grazing on the rate and mode of colonization by different species. Oikos. 72. (2): 273-282.

Cardinali, F. J. 2004. Fundamentos fisiológicos de la germinación. Aspectos morfoanatómicos de las semillas. Universidad Nacional de Mar del Plata. 169 p.

Casal, J.J. 2000 a. Phytochromes, crytochromes, phototropin: photoreceptor interations in plants. Photochem. Photobiol. 71, 1-11.

Casal, J.J. 2000 b. Fotomorfogénesis: la luz como factor regulador del crecimiento. En: Fundamentos en Fisiología Vegetal, (Eds. M. Talón y J. Azcón), Ediciones Universitat de Barcelona, Barcelona, pp 377-388.

Deregibus, V. A.;RA Sanchez,J.J; Casal.1985. Tillering responses to enrichment of red light beneath the canopy in a humid natural grassland. Journal of applied Ecology, 1985 - JSTOR

Elizalde, J. H. I., M. C. Lallana, & V. H. Lallana. 1997. Reproducción sexual y asexual de Erygium paniculatum ("caraguatá"). Actas 13º Congreso Latinoamericano de Malezas. Buenos Aires, Argentina. pp. 161-170.

Elizalde, J. H. I., C. E. Billard, M. C. Lallana, V. H. Lallana, & M. Cristaldo. 1998. Evaluación del control mecánico sobre Eryngium horridum Malme (“caraguatá”). Revista Científica Agropecuaria. 2: 21-28.

Ellis R., T. Hong, & E. Roberts. 1985. Handbooks for genebanks: Nº 2. Handbook of seed technology for genebanks. v.1. Principles and Methodology. IBPGR, Rome. 210 p.

Eriksson, O. 1989. Seedling dynamics and life histories in clonal plants. Oikos. 55: 231-238.

Fidelis, A., G. Overbeck, V. Depatta Pillar, & J. Pfadenhauer. 2008. Effects of disturbance on population biology of the rosette species Eryngium horridum Malme in grasslands in southern Brazil. Plant Ecology. 195:55-67.

Insausti, P., E. J. Chaneton, & A. Soriano. 1999. Flooding reverted grazing effects on plant community structure in mesocosms of lowland grassland. Oikos 84: 266-76.

Insausti, P., & A. Grimoldi. 2006. Gap disturbance triggers the recolonization of the clonal plant Ambrosia tenuifolia in a flooding grassland of Argentina. Austral Ecology. 3: 828-836.

Insausti, P. 2009. Factores ambientales que controlan los procesos de regeneración en pastizales naturales a partir de la germinación. Tesis. UBA.FA, Universidad de Buenos Aires. Facultad de Agronomía. Escuela para Graduados, Doctor de la Universidad de Buenos Aires en el área de Ciencias Agropecuarias, Doctorado en Ciencias Agropecuarias.

Lallana, V. H. & A. Maidana. 1992. Evaluación de la germinación de Eryngium paniculatum Cav. et Domb. (“Caraguatá”). Actas 19º Reunión Argentina de Fisiología vegetal. Córdoba. Resumen ampliado. pp.155-156.

Lallana, V. H., L. Faya De Falcón, J. H. I. Elizalde, M. C. Lallana, R. A: Sabattini, C. Billard, J.Dupleich, G. Rochi, & M. Anglada. 1998. Control integrado del “caraguatá” en un campo de San Gustavo (La Paz-Entre Ríos). INTA-EEA Paraná. Serie Extensión nº 16:9-14.

Lallana, V. H. 2004. Calidad fisiológica de semillas almacenadas de Eryngium horridum Malme, de distintos sitios de la provincia de Entre Ríos. Revista de Investigaciones de la Facultad de Ciencias Agrarias. Universidad Nacional de Rosario. Nº 6. [consulta: febrero de 2010].

Lambers, H.;Chapin F.S. III.; Pons ,T.L. 1998. Plant physiological ecology. New York: Springer.

León, R.J.C., S. E. Burkart, & C. P. Movia. 1979. Relevamiento Fitosociológico del pastizal del norte de la Depresión del Salado. Vegetación de la República Argentina. Serie Fitogeográfica nº 17 INTA, 90 p.

Mollard, F. P. O. 2007. Regeneración de pastizales naturales por germinación de semillas: control del estado de dormición de las semillas por el contendido hídrico del suelo. Tesis presentada para optar al grado de doctor de la Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. (IFEVA-FAUBA-CONICET). 108 p.

Mollard, F.P.O., & P. Insausti. 2009. Soil moisture conditions affect the sensitivity of Bromus catharticus dormant seeds to light and the emergent pattern of seedlings. Seed Science Research. 19: 81-89.

Moore, R. P. 1972. Tetrazolium staining of assessing seed quality. In Seed Ecology (ed. W. Heydecker). The Pennsylvania State University Press. University Park. pp.: 347-366.

O´Learly, N. 2002. Estudios de citogenética clásica y molecular en especies del género Eryngium L. (Umbelliferae) Sect. Paniculada Wolf. Tesis de Licenciatura en Ciencias Biológicas. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Biológicas. Laboratorio de Citogenética y Evolución. Universidad de Buenos Aires. Argentina. 65 p.

Oesterheld, M., & O. E. Sala. 1990. Effects of grazing on seedling establishment: the role of seed and safe-site availability. Journal of Vegetation Science 1: 353- 358.

Pérez, R. 2005. Las invasiones bárbaras. Revista Ida & Vuelta Rural.8 (23): 12.

Rochi, G.R., & V. H. Lallana. 1996. Análisis del crecimiento aéreo y radical de plantas de “caraguatá” (Eryngium paniculatum Cav. et Domb) Ciencia, Docencia y tecnología. 7(12):137-151.

Sabattini, R., V. Lallana, M. C. Lallana, J. H. I. Elizalde, y L. Faya De Falcón. 1991. Evaluación de atributos poblacionales de Eryngium paniculatum (“Caraguatá”) en un campo destinado al pastoreo (Tala, Entre Ríos). IV Jornadas de Ciencias Naturales del Litoral. Resumen. Gaceta Agronómica, 9 (63): 364-365.

Sala, O., M. Oesterheld, R. J. C. León, and A. Soriano. 1986. Grazing effects upon plant community structure in sub humid grasslands of Argentina. Vegetation. 67: 27-32.

Servicio Meteorologico Nacional. Historial meteorológico. Archivo diario. Promedios. < http://www.smn.gov.ar/> [consulta: febrero de 2010]

Soriano A. 1992. Río de La Plata grassland. In: Natural Grasslands: Introduction and Western Hemisphere. In Ecosystems of the world 8 A. Coupland, R. T, (ed.) Elsevier, Amsterdam. pp. 367-407.

Steel, R. G., & J. H. Torrie. 1985. Bioestadística: Principios y Procedimientos. 2ª ed. E. McGraw-Hill. México. 622 p.

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Published

2016-01-30

How to Cite

Heguy, B., & Vecchio, M. C. (2016). Canopy height modifies Eryngium horridum emergence in a temperate grassland of Argentina. Journal of the Agronomy College, 114(2), 279-286. https://revistas.unlp.edu.ar/revagro/article/view/20169