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The effect of nutrition on conidiation and conidial germination of Fusarium anthophilum obtained from barnyard grass (Echinochloa crus-galli) | ||
| Caspian Journal of Environmental Sciences | ||
| مقاله 2، دوره 6، شماره 1، فروردین 2008، صفحه 25-30 اصل مقاله (214.2 K) | ||
| نویسندگان | ||
| M. Montazeri* 1؛ M. Mojaradi2 | ||
| 1Members of Academic Board, Plant Pest and Disease Research Institute, Tehran 19395-1454 | ||
| 2Plant Pest and Disease Research Institute, Yaman Avenue, Velenjak, Tehran 19395-1454, Iran. | ||
| چکیده | ||
| An isolated Fusarium anthophilum (A. Braun) Wollenweber (isolate 16C) has been considered as a candidate for microbial control of barnyard grass [Echinochloa crus-galli (L.) P. Beauv]. The effects of nutrition on conidiation, germination rate and germ-tube elongation of conidia of the fungus were evaluated. Conidia yield, conidial germination and conidial germ-tube elongation of the fungus grown in a liquid medium with a C: N ratio of 5:1 was significantly more than that in the same medium with C: N ratio of 15:1 or 40:1. Glycerol at 1, 2 or 5% (v/v) in the medium with a C: N ratio of 5:1, significantly enhanced conidiation of the fungus. The highest conidia production was obtained in the medium contained 5% glycerol. Glycerol did not enhance germination and germ-tube elongation. Harvested conidia in 0.2, 0.5, 1 or 2% Tween 40 resulted in higher germination and germ-tube elongation than those harvested in distilled water, when they were placed on top water agar for 8 h at 20 oC. The effect of Tween 40, particularly at 0.5% (v/v) was more pronounced after 9 and 35 days desiccation period at 20 oC and 15% RH. REFERENCES Abbas, H.K. and Egley, G.H. (1996) Influence of unrefined corn oil and surface-active agents on the germination and infectivity of Alternaria helianthi. Biocont. Sci. and Technol. 6, 531-538. Alan, K.W. (1991) The classical approach with plant pathogens. In: Microbial Control of Weeds (ed. D.O. TeBeest,) Chapman and Hall, London. pp. 3-23. Baily, B.A, O’Neill, N.R. and Anderson, J D. (2004) Influence of adjuvants on disease development by Pleospora papaveracea on opium poppy (Papaver somniferum). Weed Sci. 52, 424-432. Boyette, C.D., Quimby, P.C. Jr, Caesar, A.J., Birdsall, J.L., Connick, W.J.Jr, Daigle, D.J., Jackson, M.A., Egley, G.H. and Abbas, H.K. (1996) Adjuvants, formulations, and spraying systems for improvement of mycoherbicides. Weed Technol. 10, 637-644. Boyette, C.D. and Walker, H.L. 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Weed Sci. 36, 118-121. Mojaradi, M., Montazeri, M. and Rahimian, H. (2006) Study on the biological charectristics of Fusarium anthophilum isolated from barnyard grass (Echinochloa crus-galli). In Proceedings of the first Iranian Weed Science congress, 25-26 January 2006, Plant Pest & Disease Research Institute, Tehran, Iran. pp. 625-628. Montazeri, M. and Greaves, M.P. (2002 a) Effects of nutrition on desiccation tolerance and virulence of Colletotrichum truncatum and Alternaria alternata conidia. Biocontr. Sci. & Technol. 12, 173-181. Montazeri, M. and Greaves, M.P. (2002 b) Effects of culture age, washing and storage conditions on desiccation tolerance of Colletotrichum truncatum conidia. Biocontr. Sci. & Technol. 12, 95-105. Scheepens, P.C. (1987) Join action of Cochliobolus lunatus and atrazine on Echinochloa crus-galli (L.) Beauv. Weed Res. 27, 43-47. Schisler, D.A., Jackson, M.A. and Bothast, R.J. 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(2000) Isolation and Partial characteristics of phytotoxins produced by Exserohilum monoceras, a potential bioherbicide for control of Echinochloa species. In Proceedings of the X International Symposium on Biological Control of Weeds (ed., N.R Spencer,). pp. 4-14 July (1999) Montana State University, Bozeman, Montana, USA. pp. 125-130. | ||
| کلیدواژهها | ||
| : Microbial control؛ Fusarium anthophilum؛ Echinochloa crus؛ galli؛ Glycerol؛ Nutritional regimes؛ Tween 40؛ C:N ratio | ||
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