Occurrence of the complete cycle of Puccinia sorghi Schw. in Argentina and implications on the common corn rust epidemiology
Tóm tắt
The life-cycle of Puccinia sorghi, a heteroecious fungus, consists of five well-defined spore stages. The uredinial and telial stages are completed on the primary host (maize) whereas spermagonial and aecial stages occur on Oxalis spp., a perennial and widespread weed. Portions of corn leaves with telia were surface sterilized and placed in Petri dishes with 2% water agar and maintained in a growth chamber at 25 ± 1 °C and photoperiod of 16 h light and 8 h dark for 48 h to induce the formation of basidia and basidiospores. Oxalis conorrhiza plants were inoculated with those basidiospores, to confirm the generation of spermagonia with spermatia, and subsequently aecia with aeciospores. Corn plants were then inoculated with aeciospores to confirm the formation of urediospores and teliospores. The aecial phase of common corn rust was confirmed to occur on O. conhorriza and the descriptions of spore stages in Argentina are now reported in this work, confirming a potential sexual source of variability of P. sorghi. The natural occurrence of aecial infections on O. conhorriza in Córdoba may play an important role in generating new variants of P. sorghi in Argentina, allowing a constant adaptation of the pathogen to the environment of the different corn production zones.
Tài liệu tham khảo
Anikster, Y. (1986). Teliospore germination in some rust fungi. Phytopathology, 76(10), 1026–1030.
Anikster, Y., & Wahl, I. (1979). Coevolution of the rust fungi on Gramineae and Liliaceae and their hosts. Annual Review of Phytopathology, 17(1), 367–403.
Belgrano, M. J., Morrone, O. & Zuloaga, F. O (2008). Catálogo de las plantas vasculares del Cono Sur: (Argentina, Sur de Brasil, Chile, Paraguay y Uruguay) Instituto de Botánica Darwinion. http://www2.darwin.edu.ar/Proyectos/FloraArgentina/DetalleEspecie.asp?forma=&variedad=&subespecie=&especie=conorrhiza&genero=Oxalis&espcod=25741. Accessed 12 Dec 2016.
Biswanath, Das. (2016). Common rust (extended information) maize doctor / doctor doctor. CIMMYT, from http://maizedoctor.org/common-rust-extended-information. Accessed 20 Dec 2016.
Cummins, G. B. (1971). Page 260 in: The rust Fungi of cereals, grasses and bamboos. New York: Springer-Verlag. https://doi.org/10.1007/978-3-642-88451-1.
Darino, M. A. (2015). Estudio de las resistencias a roya común del maíz ya roya de la hoja del trigo (Doctoral dissertation, Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires).
De Rossi, R.L.; Guerra, F.A.; Plaza, M.C.; Vuletic, E.; Brücher, E.; Guerra, G.D; Couretot, L.; Parisi, L. & Magnone, G. (2016). Enfermedades del maíz en las últimas cinco campañas. Actas resúmenes XXIV Congreso Aapresid - Resiliar. Rosario, Argentina, 03 agosto de 2016.
Dunhin, B. J., Pretorius, Z. A., Bender, C. M., Kloppers, F. J., & Flett, B. C. (2004). Description of spore stages of Puccinia sorghi in South Africa. South African Journal of Plant and Soil, 21(1), 48–52.
Farr, D.F. & Rossman, A.Y. (2016). Fungal databases, systematic mycology and microbiology laboratory, ARS, USDA. From https://nt.ars-grin.gov/fungaldatabases/. Accessed 28 Dec 2016.
Formento, A. N. (2010). Enfermedades foliares reemergentes del cultivo de maíz: royas (Puccinia sorghi y Puccinia polysora), tizón foliar (Exserohilum turcicum) y mancha ocular (Kabatiella zeae). Actualización técnica. EEA Paraná. From https://inta.gob.ar/sites/default/files/script-tmp-act-tecnica-n2_16_enfermedades-foliares-reemergentes-.pdf. Accessed 12 Dec 2016.
Godoy, E. F., & Bruni, O. (1952). Ciclo evolutivo de las royas del lino (Melampsora lini) y del maíz (Puccinia sorghi) en la Argentina. Revista Argentina de Agronomía, 19, 21–34.
Gonzalez, M. (2005). Roya común del maíz: altos niveles de severidad en la zona maicera núcleo (campaña 04/05). Rev. Agromensajes, (15). From http://www.fcagr.unr.edu.ar/Extension/Agromensajes/15/2AM15.htm. Accessed 15 May 2017.
Gonzalez, M., Eyherabide, G., & Laguna, I. G. (2011). Variabilidad de Puccinia sorghi en la zona maicera núcleo Argentina. 2011 Tropical Plant Pathology, 36(3), 195–199.
Guerra, F. A., Brücher, E., De Rossi, R. L., Plazas, M. C., Guerra, G. D., & Ducasse, D. A. (2016). First report of Oxalis conorrhiza as alternate host of Puccinia sorghi, causal agent of common rust of maize. Plant Disease, 100(2), 519.
INTA. (1980). El cultivo de Maíz. Colección Principales Cultivos de la Argentina. Ministerio de Agricultura y ganadería de la Nación. INTA. Buenos Aire. Argentina. p.81.
Lindquist, J. C. (1982). Royas de la República Argentina y zonas limítrofes (p. 574). Colección Científica. Tomo XX.
Mendgen K. (1984) Development and physiology of Teliopores. En: Bushnell, W. (Ed.). (2012). The cereal rusts: Origins, specificity, structure, and physiology (Vol. 1). Elsevier. Cap 12 p. 362–377.
MAGyP (Ministerio de Agricultura, Ganadería y Producción) (2016). Dirección de Estimaciones Agrícolas y Delegaciones Subsecretaría de Agricultura, Dirección Nacional de Estimaciones, Delegaciones y Estudios Económicos Portal de Datos Abiertos del Ministerio de Agroindustria. From https://datos.magyp.gob.ar/reportes.php?reporte=Estimaciones. Accessed 29 April 2016.
Morin, L., Auld, B. A., & Brown, J. F. (1993). Host range of Puccinia xanthii and post penetration development on Xanthium occidentale. Canadian Journal of Botany, 71(7), 959–965.
Parisi, L.; Couretot, L.; Presello, D.; Suarez, L.; Magnone, G. & Ferraris, G. (2013). Campaña 2012/13. Evaluación de enfermedades foliares en R4. INTA Pergamino, evaluación de enfermedades de maíz en R4. From http://inta.gob.ar/documentos/maiz-evaluacion-de-enfermedades-en-r4. Accesed 18 April 2016.
Pataky J.K. (2016), Common rust. In: Munkvold G. & White D. G. (Ed) Compendium of corn diseases, fourth edition, APS Press, St. Paul, Minnesota, p.66–71. ISBN 978-0-89054-492-1.
Pavgi, M. S. (1975). Teliospore germination and cytological aberrations in Puccinia sorghi Schw. Cytologia, 40(2), 227–235.
Pavgi, M. S., Cooper, D. C., & Dickson, J. G. (1960). Cytology of Puccinia sorghi. Mycologia, 52(4), 608–620.
Reis, E. M., Casa, R. T., & Bresolin, A. C. R. (2004). Manual de diagnose e controle de doenças do milho (2nd ed.p. 44). Lages: Graphel.