Population structure,genetic diversity,and sexual state of the rice brown spot pathogen Bipolaris oryzae from three Asian countries          下载免费PDF全文

A. Ahmadpour  C. Castell‐Miller  M. Javan‐Nikkhah  M. R. Naghavi  F. P. Dehkaei  Y. Leng  K. D. Puri  S. Zhong 《Plant pathology》2018,67(1):181-192

Bipolaris oryzae causes brown spot in rice (Oryza sativa) inflicting substantial grain yield losses worldwide. Knowledge of the population structure, genetic diversity and sexual recombination of the fungal pathogen can help to implement effective disease management strategies. In this study, B. oryzae isolates sampled from Iran, the Philippines and Japan were analysed with 12 simple‐sequence repeat (SSR) markers, newly developed from the genome sequence of the fungus. Among the 288 B. oryzae isolates genotyped, 278 unique haplotypes were identified. High genotype numbers (richness) with even distribution (evenness) were found within the collection sites. Both mating types, MAT1‐1 and MAT1‐2, were present in each collection area, and the sexual state was induced under controlled conditions with production of viable ascospores. However, the tests of linkage disequilibrium rejected of the hypothesis of random mating. Discriminant analysis of principal components (DAPC) revealed that the B. oryzae collection formed three clusters, each consisting of isolates from different collection sites. Analysis of molecular variance (amova ) showed that genetic variation among clusters was 18.7%, with the rest of the variation distributed within clusters (R_ST = 0.187, P < 0.001). Statistically significant pairwise genetic differentiation was found between the clusters. These results show that Asian B. oryzae isolates are genetically diverse, and, overall, distributed in three groups. These findings will be helpful in managing the disease and guide the use of representative isolates needed for selection of resistant rice varieties.  相似文献   

Reporting temporal fluctuations of hepatic C16 and C18 fatty acids during late gestation and early lactation in dromedary camel     

Ahmadpour  Amir  Christensen  Rachael G.  Zarrin  Mousa  Farjood  Farhad  Ahmadpour  Ahmadali 《Tropical animal health and production》2019,51(6):1651-1660

Tropical Animal Health and Production - Based on current knowledge, C16 and C18 fatty acids (FA) are considered the most functional FA in hepatic metabolism. Although these FAs have been...  相似文献   

Camelids: new players in the international animal production context     

Zarrin  Mousa  Riveros  José L.  Ahmadpour  Amir  de Almeida  André M.  Konuspayeva  Gaukhar  Vargas-Bello-Pérez  Einar  Faye  Bernard  Hernández-Castellano  Lorenzo E. 《Tropical animal health and production》2020,52(3):903-913

Tropical Animal Health and Production - The Camelidae family comprises the Bactrian camel (Camelus bactrianus), the dromedary camel (Camelus dromedarius), and four species of South American...  相似文献   

Assessment of heavy metal uptake and translocation in Dyera costulata for phytoremediation of cadmium contaminated soil     

Nik M. Majid  M.M. Islam  Redzuan Abdul Rauf  Parisa Ahmadpour  Arifin Abdu 《Acta Agriculturae Scandinavica, Section B - Plant Soil Science》2013,63(3):245-250

Abstract

Heavy metal pollution is a widespread global problem causing serious environmental concern. Cadmium, one of the heavy metals, is water soluble and can be transferred from soil to plants and enter into the food chain. It is detrimental to human health because it accumulates in the body and can cause renal tubular dysfunction, pulmonary emphysema and osteoporosis. This heavy metal needs to be cleaned up for a clean and safe environment. An experiment was conducted to evaluate the potential of Dyera costulata as a phytoremediator to absorb cadmium from contaminated soils. Dyera costulata seedlings were planted on six different growth media (soil + different levels of cadmium): Control, 25 ppm Cd, 50 ppm Cd, 75 ppm Cd, 100 ppm Cd and 150 ppm Cd. The highest growth performance mainly height, basal diameter and number of leaves were in the control, 50 ppm Cd and 25 ppm Cd treatments, respectively. The highest accumulation of cadmium (52.9 ppm) was in the 75 ppm Cd treatment. Among the plant parts, leaves showed the highest concentration of cadmium. Dyera costulata showed high translocation factor and low bioconcentration factor values in soil at high cadmium concentrations and was also able to tolerate and accumulate high concentrations of cadmium. The roots of Dyera costulata were found to be suitable for the absorption of cadmium in contaminated soils. This species can be an efficient phytoremediator for soils contaminated with cadmium.  相似文献   

Immunomodulatory effect of cimetidine in common carp (Cyprinus carpio L.)     

Seyyed Mehdi Hosseinifard  Asieh Ahmadpour  Bagher Mojazi Amiri  Majid Razeghi Mansour  Arezo Ebrahimpour 《Fish physiology and biochemistry》2013,39(6):1505-1511

The main indication of cimetidine is being H₂-receptor antagonist, but studies suggest that cimetidine may also act as a non-specific stimulant of cell-mediated immunity and immunomodulator. In order to determine the immunomodulatory effect of dietary intake of cimetidine in the common carp (100 ± 10 g), subjects were fed diets containing 0 (control), 50, 100 and 200 mg cimetidine kg^?1 of dry diet for a period of 6 weeks. TLC and NBT assays were significantly (P < 0.05) stimulated in cimetidine-supplemented groups displaying the highest value in 200 mg kg^?1 group. A decrease (P < 0.05) in cortisol and ACH50 value was recorded in fish treated with cimetidine. Serum protein, albumin and serum globulin levels were not significantly changed. The findings of the present investigation suggest that the incorporation of cimetidine in the diet of common carp enhances the non-specific immunity.  相似文献