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Articles by A. Roustaei
Total Records ( 4 ) for A. Roustaei
  S.A. Sadat Noori , A. Roustaei and B. Foghi
  Whole plant responses to salinity and their interaction to different conditions were evaluated for vegetative and productive traits of wheat. For this purpose salinity tolerance was examined for 75 families produced from crossing 25 F2 plants from crosses between Siete Cerros (salt tolerant) and Axona (salt sensitive) spring bread wheats, to their parents and their F1 progeny. The 75 families and their parents were grown under 0 (control) and 50 mM NaCl. Data for eleven metric traits, days to heading, days to maturity, final plant height, spike length, ear weight, straw weight, number of grains per ear, grain yield per plant, 000 grain weight, whole plant weight and harvest index was measured. Salinity reduced performance with regard to all the above traits. The genotype x concentration interaction was highly significant for yield components, indicating that plants responded differently in yield components when exposed to the different levels of salinity. In contrast, the genotype x concentration interactions for the vegetative traits, heading date, maturity date, final plant height, weight of straw and whole plant weight were not significant and or slightly significant indicating a lower differentiation response to salinity. This may be because a limited number of genes control the expression of vegetative more than productive traits in wheat when exposed to salinity.
  E. Sari , H.R. Etebarian , A. Roustaei and H. Aminian
  Pseudomonas fluorescens CHAO, P. fluorescens bioIII (21P), P. fluorescens bioIII (22P), P. fluorescens bioV(5 kM) and P. fluorescens bio V (32J) were evaluated as potential biological agent for wheat take-all caused by Gaeumannomyces graminis var. tritici in vitro and vivo. Dual culture, volatile metabolite and cell free culture test showed that all isolates of Pseudomonas tested inhibited growth of the pathogen. Inhibition varied from 32 to 73% in dual culture, from 52 to 96% in volatile metabolite and from 77 to 98% in cell free culture test. The seed soaking treatment with P. fluorescens CHAO and P. fluorescens bioIII (21P) were the most effective in reducing disease index and also promoted root and shoot weight in glasshouse and field experiment. The weight of 100 grain from plants treated with pathogen + P. fluorescens bioIII (21P) or P. fluorescens CHAO were significantly greater than in controls inoculated with pathogen alone in micorplot test. These results indicate that P. fluorescens bioIII (21P) could be an important new biological control for take-all of wheat.
  M. Salehpour , H.R. Etebarian , A. Roustaei , G. Khodakaramian and H. Aminian
  Trichoderma viride T112 and T. viride (MO), T. harzianum (M) and T. harzianum T194 were used as potential biological agent for control of common root rot caused by Bipolaris sorokiniana. Cell free and antifungal metabolites produced by all Trichoderma isolates inhibited growth of Bipolaris sorokiniana. The inhibition varied among isolates of Trichoderma and ranged from 58.20 to 93.93% using the cellophane overlay method and from 66.66 to 98.25% in volatile test. Mycelial growth of B. sorokiniana was numerically reduced more by T. viride T112 than the other isolate tested (p<0.01). The seed soaking treatment and also soil treatment with T. vride T112 and T. viride (MO) were the most effective in reducing infection by the pathogen compared with the corresponding control (p<0.01) All isolates of Trichoderma increased plant height, fresh and dry weight of roots and shoots of wheat seedling compared with the uninoculated control. Among Trichoderma isolates, T. viride T112 and T. viride (MO) proved to be the best in supporting the growth of wheat (p<0.01).
  E. Sari , H.R. Etebarian , A. Roustaei and H. Aminian
  Bacillus pumilus (4 km), B. pumilus (7 km), B. subtilis (1j), B. licheniformis (b3n) were evaluated as potential biological agent for wheat take-all caused by Gaeumannomyces graminis var. tritici in vitro and vivo. Dual culture, volatile metabolite and cell free culture test showed that all isolates of Bacillus tested inhibited growth of the pathogen. Inhibition varied from 41 to 87% in dual culture, from 85 to 96% in volatile metabolite and from 95 to 98% in cell free culture test. The seed soaking treatment with Subtilin (commercial antagonist formulated from Bacillus subtilis) and Bacillus pumilus (7 km) were the most effective in reducing disease index and also promoted root and shoot weight in glasshouse and field experiment. The weight of 100 grains from plants treated with pathogen+Subtilin, Bacillus pumilus (7 km) and B. licheniformis (b3n) were significantly greater than in controls inoculated with pathogen alone in micorplot test. These results indicate that Bacillus pumilus (7 km) could be an important new biological control for take-all of wheat.
 
 
 
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