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Research Journal of Seed Science
  Year: 2014 | Volume: 7 | Issue: 3 | Page No.: 63-74
DOI: 10.3923/rjss.2014.63.74
Seed Discoloration and their Effect on Seedlings Growth of Egyptian Hybrid Rice
E.A.M. Ibrahim and M.S. Abo El-Dahab

The 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.
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How to cite this article:

E.A.M. Ibrahim and M.S. Abo El-Dahab, 2014. Seed Discoloration and their Effect on Seedlings Growth of Egyptian Hybrid Rice. Research Journal of Seed Science, 7: 63-74.

DOI: 10.3923/rjss.2014.63.74








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