Nature and Importance of Black Point in Winter Cereals

Öz

Black point is a fungal disease of grain, penetrating as shallow surface of the embryo. When the severity of the disease increases, it can also penetrate into the crease of the grain as well as the embryo and leads to turn black or dark brown color of the grain. Black point is seen in wheat grown in all regions. Black point reduces the grain's quality and value. Durum wheat is especially sensitive to the disease but wheat, barley and triticale are also affected by this disease. Durum and bread wheat are affected by this disease may not be accepted by the millers. Black point is one of the major problems in the wheat trade. Although the disease does not reduce grain yield, the colour and brightness of grain are effected negative. Because some fungal species causing black point, cause the reduction of the germination power and are reason for root rot problems, with the use of these affected seeds in sowing, the reduction in grain yield may be observed. In addition, in many article, the abiotic stress factors such as the amount of heavy rainfall and high humidity and extreme temperatures have also been reported to cause black point.

Anahtar Kelimeler

• wheat,Black point,cereals

Serin İklim Tahıllarında Embriyo Kararması ve Önemi

Öz

Embriyo kararması tanenin embriyosunun yüzeyinde sığ olarak da içine işleyen mantari bir hastalıktır. Embriyo kararması hastalığının şiddetti arttıkça, hastalık tane embriyosunun yanı sıra tanenin karın kısmına da nüfuz edebilir ve tanenin renginin siyah ve koyu kahverengiye dönüşmesine yol açar. Embriyo kararması buğday yetişen bütün bölgelerde görülür. Embriyoda renk bozulmasına neden olur. Embriyo kararması tanenin kalitesini ve değerini düşürür. Makarnalık buğday embriyo kararmasına özellikle hassastır, ancak buğday, arpa ve tritikale de bu hastalıktan etkilenir. Embriyo kararmasından etkilenmiş makarnalık ve ekmeklik buğdaylar değirmenciler tarafından kabul edilmeyebilir. Embriyo kararması buğday ticaretindeki önemli sorunlardan biridir. Hastalık tane verimini düşürmemesine rağmen tanenin rengini ve parlaklığını olumsuz yönde etkiler. Embriyo kararmasına neden olan bazı mantar türleri çimlenme gücünün azalması ve kök çürüklüğü sorunlarına yol açacağı için, bu hastalığa yakalanmış tohumların ekimde kullanımıyla tane veriminde düşüş görülebilir. Yoğun yağış ve yüksek nem miktarının ve yüksek sıcaklık gibi abiyotik stres faktörlerinin de embriyo kararmasına neden olduğu bildirilmiştir.

Anahtar Kelimeler

• Buğday,embriyo kararması,tahıllar

Kaynakça

1. Agarwal, G. P., Awastly, B., Thakur, M. K. (1983). Studies on the wheat grain storage in Madhya Pradash: efficacy of certain fungicides against black point disease of wheat. Rev. of Plant Pathology. 62:137.
2. Anonim, (1987). Cereals statistics 1987. Home-Grown Cereals Authority Hamlyn house, Highgate hill, London.
3. Anonim, (2010). Toprak Mahsulleri Ofisi Hububat Alım ve Satış Esaslarına İlişkin Uygulama Yönetmeliği 4.6.2010 Tarih ve 619 nolu Makam Oluru.
4. Anonim, (2015). http://www1.agric.gov.ab.ca/$Department/deptdocs.nsf/All/prm2434?OpenDocument (2015). (Şekil 4 Erişim tarihi; 28.12.2015).
5. Clarke, M. P., Gooding, M. J., Jones, S. A. (2004). The effects of irrigation, nitrogen fertilizer and grain size on Hagberg falling number, spesific weight and black point of winter wheat. Journal of the Science of Food and Agriculture. 84: 227-236.
6. Conner, R. L. (1987). Influence of irrigation timing on blackpoint incidence in soft spring wheat Canadian Journal of Plant pathology 9, 301-306.
7. Conner, R. L. (1989). Influence of irrigation and precipitation on incidence of black point in soft white spring wheat. Canadian Journal of Plant Pathology. 11: 388-392.
8. Conner, R. L., Carefoot, J. M., Bole, J. B., Kozub, G. C. (1992). The effect of nitrogen fertilizer and irrigation on black point incidence in soft white spring wheat. Plant and Soil 140: 41- 47.

9. Conner, R. L., Kuzyk, A. D. (1988). Black point incidence in soft whites pring wheat in Southern Alberta and Saskatchewan between 1982 and 1987. Canadian Plant Disease Survey. 68: 27-31.
10. Cromer, M. G., Mulholland, R. I. (1988). Blackpoint of wheat fungal associations, cultivar susceptibility and effects on grain weight and germination. New Zealand Journal of Agricultural Research 31- 51-56.
11. Culshaw, F., Cook, R. J., Magan, N., Evans. E. J. (1988). Blackpoint of wheat. HGCA Research Review No. 7, Home-Grown Cereals Authority, London, UK, 43 pp.
12. Deraje, T., Paul, V.S., Birhanu, B. (1991). Studies on black point disease on durum wheat in Ethiopia. Seventh regional wheat workshop for eastern, central and southern Africa. 16-19 September, 1991. Nakuru, Kenya.
13. Dexter, J. E., Matsuo, R. R. (1982). Efffect of smudge an black point mildewed kernels and ergot on durum wheat quality Cereal Chemistry 59, 63-39.
14. El Helaly, A. F. (1947). Teh Black- point disease of Wheat Phytopathology 37, 773-780.
15. Fernandez M. R., Conner, R. L. (2011). Blackpoint and smudge in wheat. Prairİe Soils and Crops Journal Volume 4-11.
16. Fernandez, M. R., Clarke, J. M., DePauw. R. M. (1998). Effect of environmental variables on the development of kernel discolouration by Pyrenophora tritici-repentis in durum wheat. Can. J. Plant Pathol. 20: 104-110.
17. Gaur, A. (1986). Black point of wheat. ln: Problems and Progress of wheat pathology in South Asia. (Eds.Joshi, .M.;Singh"DV and Srivastava, K.D.) pp.230-241 Malhotra Publishing house, New Delhi.
18. Havran D. I., Pero R. W. (1976). Teh structure of Alternaria metabolites. Advances in Cehemicak Science 149, 349- 355.
19. Hosford, R. M. Jr. (1975). Phoma glomerata, a new pathogen of wheat and triticale, cultivar resistance related to wet period. Phytopathology. 65: 1236-1239.
20. Huguelet, J. E., Kiesling, R. L. (1973). Influence of inoculum composition on the black point disease of durum wheat. Phytopathology 63: 1220-1225.
21. Khetrapal, R. K., Agrawal, V. K. (1979). Studies on some aspects of black point and Kamal bunt disease of triticale. Indian Phytopath. 32: 292- 294.
22. King, J. E., Evens, A. D., Stewart, B. A. (1981). Black point of grain in spring wheats of 1978 harvest. Plant Pathol. 30: 51-53.
23. Kumar, J., Schafer, P., Huckelhoven, R., Langen, G., Baltruschat, H., Stein, E., Nagarajan, S., Kogel. K. H. (2002). Bipolaris sorokiniana, a cereal pathogen of global concern: Cytological and molecular approaches towards better control. Molecular Plant Pathology. 3:185-195.
24. Lehmensiek, A., Campbell, A. W., Williamson, P. M., Michalowitz, M., Sutherland M. W., Daggard G. E. (2004). QTL’s for black point resistance in wheat and the identification of potential markers for use in breeding programs. Plant Breeding. 123: 410-416.
25. Lorenz, K. (1986). Effects of black point on grain composition and baking qualityof New Zeland wheat. N. Z. J. Agric. Res. 29: 711-718.
26. Luz, W. C., Hosford., R. M. (1980). twelve races Pyrenoptera trichostoma races for virülence to wheat in the central plains of North America. Phytopathology 70. 1193-1196.
27. Martin, P. M. D., Gilman. G. A. (1976). A consideration of mycotoxin hypothesis with special reference to the mycoflora of maize, sorghum, wheat and groundnuts. Tropical product institute, 6-105, London, VIII + 112pp.
28. Özer, N. (2005). Determination of the fungi responsible for black point in bread wheat and effects of disease on emergence and seedling vigour. Trakya Univ. J. Sci. 6: 35-40.
29. Rees, R. G., Martin D. J., Law, D. P. (1984). Black point in bread wheat. Effects on quality and germination and fungal associations. Australian Journal of Experimental Agriculture and Animal Husbandry. 127: 601-605.
30. Sadasivaiah, R. S., Perkovic, S. M., Pearson, D. C., Postman, B., Beres. B. L. (2004). Registration of ‘AC Andrew’ wheat. Crop Sci. 44: 696-697.
31. Sisterna, M. N., Sarandon, S. J. (2005). Preliminary studies on the natural incidence of wheat black point under different fertilization levels and tillage systems in Argentina. Plant Pathology Journal. 4: 26-28.
32. Solanki, V. A , Augustine, N., Patel A. A. (2006). Impact of black point on wheat trade and its managament Indian Phytopath59(1) 44-47).
33. Toklu, F., Akgül, D. S., Biçici, M., Karaköy, T. (2008). The relationship between black point and fungi species and effects of black point on seed germination properties in bread wheat. Turk J Agric For 32 267-272.
34. Toklu, F., Özkan, H., Yağbasanlar, T. (1999). Bazı ekmeklik ve makarnalık buğday genotiplerinde dane kararmasının çimlenme ve fide gelişimine etkisi. Türkiye 3. Tarla Bitkileri Kongresi. Cilt I, Genel ve Tahıllar. Adana. 378-383.
35. Wang, H., Fernandez, M. R., Mc Caig, T. N., Gan, Y. T., DePauw R. M., Clarke, J. M. (2003). Kernel discolorotion and downgrading in spring wheat warieties in western Canada. Can. J. Plant Pathol. 25: 350-361.
36. Wang, H., Fernandez, M. R., Clarke, F. R. DePauw R. M., Clarke J. M. (2002). Effects of foliar fungicides on kernel black point of wheat in southern Saskatchevan. Canadian Journal of Plant Pathology. 24:287-293.