ورقة علمية منشورة : Pathological Evaluation and Quantification of Some Seed-Borne Fungi of Wheat

Journal Article

Al-Askar, A.A. . 2014

• المجلة \ الصحيفة: JOURNAL OF PURE & APPLIED MICROBIOLOGY
• رقم العدد: 2
• رقم الإصدار السنوي: 8
• الصفحات: 303-320

مستخلص المنشور

Five pathogenic fungi (Alternaria alternata, Bipolaris sorokiniana, B. spicifera,

Fusarium avenaceum and F. graminearum) were evaluated for seed discoloration,

shriveling, germination and seedling vigor of wheat. Three wheat cultivars (Yecora Rojo,

Logame and Sammah), two inoculation times (at anthesis and 12 days later) and two

environmental conditions (wet and dry) were used in this investigation. Considerable

differences were recorded between the tested fungi for seed discoloration, shriveling,

germination and seedling vigor at each treatment. Fungal mycelia were also assessed in

wheat grains via estimation of chitin and ergosterol contents. For each fungal species,

significant differences between samples were detected. It is evident that visual

characteristics of seed provide an imperfect guide to the extent that seed is infected by

fungi. Chemical analysis for either chitin or ergosterol, if developed for routine use,

could well be helpful in identifying potentially samples on which additional analyses

for specific mycotoxins could be carried out.