Research Journal of Seed Science1819-35522151-6146Science International10.3923/rjss.2014.63.74IbrahimE.A.M. El-DahabM.S. Abo 3201473The experiments were conducted at the laboratory of Seed Technology Research
Unit, Mansoura, Seed Technology Research Department, ARC, to investigate the
effect of seed discoloration on seedling vigor of two Egyptian hybrid rice (EHR1
and EHR2). Eight categories of discoloration seeds were tested by Blotter method
and percentage of seed-borne fungi were recorded. The main results could be
summarized as follows: Bipolaris oryzae associated with light brown,
black dots, dark brown and brown spot discoloration with high percent followed
by Alternaria padwickii associated with ash gray, dark brown and light
pink discoloration, Fusarium spp. responsible for light pink and pale
yellow, A. alternata associated with ash gray, Curvularia oryzae associated
brown spot and dark brown discoloration, while Sarocladium oryzae lead
to light brown discoloration, respectively. Bipolaris oryzae, Fusarium
spp. and A. padwickii were most prevalent in the seed coat followed by
husks and embryo, while S. oryzae recorded the highest value in the embryo.
Light brown, dark brown, brown spot and black dots discoloration gave maximum
presence in abnormal seedlings followed by pale yellow, light pink and ash gray,
respectively. On the other hand, light brown and light pink discoloration were
found principally in rot seeds when compared with healthy seeds. All pathogens
of fungi were isolated from seed rot and blight seedlings, while isolated B.
oryzae and S. oryzae were found in stunted seedlings.]]>Abdel-Monem, A.M., A.A. EL-Wakil, M.A. Shaarawy and S.B. Mathur,199573315331Agarwal, P.C., C.M. Mortensen and S.B. Mathur,19891989Arshad, H.M.I., J.A. Khan, S. Naz, S.N. Khan and M. Akram,2009213136Bateman, G.L. and H. Kwasna,199913271282Danquah, O.A., S.B. Mathur and P. Neergaard,19769185187Devaraju, P.J.K., K. Vishwanth, K.S. Nagaraju and K.P.R. Prasanna,20123195199Duraiswamy, V.S. and V. Marippan,19831983Ellis, M.B.,1980Fakir, G.A., I. Hossain, M.U. Ahmad, M.A.U. Doula and M.M. Alam,20022002Ghosh, M.K., R. Amudha, S. Jayachandran and N. Sakthivel,2002Sarocladium oryzae in sheath rot-infected grains of rice.]]>34398401Gomez, K.A. and A.A. Gomez,19842nd Edn.,Pages: 704Pages: 704Guerrero, F.C., S.B. Mathur and P. Neergaard,1972Vol. 37,pp: 985-997pp: 985-997Imolehin, E.D.,19836713341336Khanzada, K.A., M.A. Rajput, G.S. Shah, A.M. Lodhi and F. Mehboob,20021441444Mathur, S.B., J.I. Mallya and P. Neergaard,1972Vol. 37,pp: 803-810pp: 803-810Milagrosa, S.P.,1987Sarocladium oryzae (Sawada) W. Gams and Hawksw. through seed.]]>1987Narain, A.,199222126Neergaard, P.,19731217254Nghiem, N.T. and V.T. Hoang,19931993Ora, N., A.N. Faruq, M.T. Islam, N. Akhtar and M.M. Rahman,201110482488Ou, S.H.,19832nd Edn.,Ou, S.H.,19852nd Edn.,Pages: 380Pages: 380Puglia, A.,2004Oryza sativa L., Italy).]]>541821Rath, G.C.,1974Drechslera oryzae on the grain weight, germination and emergence of some high yielding varieties of rice.]]>40156159Roy, A.K. and P.K. Baruah,197238405406Sachan, I.P. and V.K. Agarwal,1995481420Sakthivel, N., R. Amudha and S. Muthukrishnan,2002Sarocladium oryzae.]]>106609614Tateishi, H.,199864443450Vachspati, P., V.K. Agarwal and M.P. Pandey,2000534549Zhou, Z.Y., S.D. Tang and J.Y.M. Hu,19891989ISTA.,1999311152