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A serious outbreak of barley yellow dwarf luteovirus (BYDV, MAV-type) on wheat in the Garhwal Hills, Central Himalayas, India is reported. This is the first conclusive evidence based on serology for the presence of MAV-BYDV in India. 相似文献
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Cardador-Martínez A Albores A Bah M Calderón-Salinas V Castaño-Tostado E Guevara-González R Shimada-Miyasaka A Loarca-Piña G 《Plant foods for human nutrition (Dordrecht, Netherlands)》2006,61(4):161-168
Common beans are rich in phenolic compounds, which can provide health benefits to the consumer. The objective of this work was to study the relationship among antimutagenicity, antioxidant and enzymatic activities of methanolic extract and trolox by principal components multivariate analysis. Antimutagenicity of phenolic compounds present in methanolic extract from the seed coat of common beans (P. vulgaris, Flor de Mayo Bajío cultivar) and trolox against AFB1 mutagenicity were evaluated in the Salmonella typhimurium microsuspension assay. Antioxidant capacity of methanolic extract and trolox were evaluated using β-carotene and 1,1-diphenyl-2-picryhydrazyl (DPPH) in vitro model assays. Cythrome P450 activity was measured by fluorometric assay. For phenolic extract, trolox and phenolic extract + trolox, the inhibition on AFB1 mutagenicity in tester strain TA100 was 47, 59 and 69%, respectively. While in TA98 was 39, 48 and 68%. The inhibition of phenolic compounds, trolox and phenolic compounds + trolox on cytochrome P450 (CYP450) activity was 48, 59 and 88%, respectively. Correlation analysis showed that phenolic extract and trolox have high antimutagenic and antioxidant activity and also inhibited enzymatic activity. The results suggest that the primary mechanism of action of phenolic compounds in beans against AFB1 mutagenicity may be extra-cellular in the microsuspension assay. 相似文献
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Habitat use in eight populations of Sceloporus grammicus (Squamata: Phrynosomatidae) from the Mexican Plateau 
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下载免费PDF全文 Adrian LEYTE‐MANRIQUE Uriel HERNÁNDEZ‐SALINAS Aurelio RAMÍREZ‐BAUTISTA Vicente MATA‐SILVA Jonathon C. MARSHALL 《Integrative zoology》2017,12(3):198-210
Studies on habitat use have often helped explain observed variation in morphology, behavior and reproductive characteristics among populations within a single species. Here we analyze morphological and ecological characteristics of individuals from the Sceloporus grammicus species complex from 7 different localities (CER, El Cerezo; PAC, Pachuca; HUI, Huichapan; EZA, Emiliano Zapata; SMR, San Miguel Regla; LMJ, La Mojonera; and LMZ, La Manzana) in the state of Hidalgo, and one locality (Cahuacán) in the State of Mexico. A canonical correspondence analysis (CCA) showed that females from PAC, EZA, LMZ, HUI, SMR and CAH populations use similar microhabitats characterized mostly by bare soil, in females from LMJ and CER use microhabitats characterized primarily by vegetation and rocks. Females were observed using 12 different types of perches. With regard to perch height use, the CCA showed that females from PAC, LMJ, LMZ, SMR, CER and CAH populations were correlated with height to nearest perch (HNP), in the rest of the females were not related to any perch use variable. In contrast, the CCA showed that males from PAC, LMJ and CAH were characterized by microhabitats with higher vegetal coverage, while males from LMZ and CER used microhabitats composed of bare soil, but males from HUI and SMR populations used microhabitats composed chiefly of bare soil and rocks. With respect to perch height use, the CCA showed that males from PAC, LMJ, EZA and LMZ were correlated with distance to the nearest perch, but the rest of the males were not correlated with any perch use variables. Males were observed in 9 different perch types. The males were larger than the females in all morphological variables analyzed. Moreover, in both sexes the snout–vent length is positively correlated with all morphological variables, and although both the slope and ordinate of the origin of all morphological variables were larger in males than females, the analysis of covariance indicated that there is no increase in the morphological variables with increasing SVL between sexes. Our results suggest that variation in habitat use and morphology among populations is an adaptive response (phenotypic plasticity) to the environmental conditions where these populations of Sceloporus grammicus occur. 相似文献
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RUTH GROSS-TSUBERY ORIT CHAI YAEL SHILO LIMOR MIARA IGAL H. HOROWITZ AYELET SHMUELI ITZHAK AIZENBERG CHEN HOFFMAN RAM REIFEN MERAV H. SHAMIR 《Veterinary radiology & ultrasound》2010,51(1):34-38
Osseous malformations in the skull and cervical vertebrae of lions in captivity are believed to be caused by hypovitaminosis A. These often lead to severe neurologic abnormalities and may result in death. We describe the characterization of these abnormalities based on computed tomography (CT). CT images of two affected and three healthy lions were compared with define the normal anatomy of the skull and cervical vertebrae and provide information regarding the aforementioned osseous malformations. Because bone structure is influenced by various factors other than the aforementioned disease, all values were divided by the skull width that was not affected. The calculated ratios were compared and the most pronounced abnormalities in the affected lions were, narrowing of the foramen magnum, thickening of the tentorium osseus cerebelli and thickening of the dorsal arch of the atlas. CT is useful for detection of the calvarial abnormalities in lions and may be useful in further defining this syndrome. 相似文献
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Various issues concerning the progress of rice research are related to ambiguous germplasm identification,difficulty in tracing pedigree information,and lack of integration between genetic resources,characterization,breeding,evaluation and utilization data.These issues are the constraints in developing knowledge-intensive crop improvement programs.The rapid growth,development and the global spread of modern information and communication technology allow quick adoption in fundamental research.Thus,there is a need to provide an opportunity for the establishment of services which describe the rice information for better accessibility to information resources used by researchers to enhance the competitiveness.This work reviews some of available resources on rice bioinformatics and their roles in elucidating and propagating biological and genomic information in rice research.These reviews will also enable stakeholders to understand and adopt the change in research and development and share knowledge with the global community of agricultural scientists.The establishment like International Rice Information System,Rice Genome Research Project and Integrated Rice Genome Explorer are major initiatives for the improvement of rice.Creation of databases for comparative studies of rice and other cereals are major steps in further improvement of genetic compositions.This paper will also highlight some of the initiatives and organizations working in the field of rice improvement and explore the availability of the various web resources for the purpose of research and development of rice.We are developing a meta web server for integration of online resources such as databases,web servers and journals in the area of bioinformatics.This integrated platform,with acronym iBIRA,is available online at http://ibiranet.in.The resources reviewed here are the excerpts from the resources integrated in iBIRA. 相似文献