Kupusnjače u pokrovnim usevima

In addition to true cereals (Poaceae) and legumes (Fabaceae), which are most commonly used as cover crops, plant species from the mustard family (Brassicaceae) are increasingly used due to their biological and agronomic characteristics. Crucifers grow fast, develop high biomass, achieve great land coverage ( gt 80%) and possess high nutrient uptake. These are the reasons that their use as cover crops has a beneficial effect on soil fertility, erosion prevention, weed suppression and groundwater quality protection. Majority of crucifers contain glucosinolates, the enzymatic conversion of which releases biologically active compounds into the soil, which are toxic to soil pathogens, nematodes and some weeds. In this way, crucifers act as soil biofumigants, and this effect is used in the control of harmful organisms within the cover crops technology. Due to different production systems and agroecological conditions, the release of these compounds in the soil is not constant, so the efficiency is not always the same. In this regard, biofumigation as a biological measure should be seen as a part of an integrated pest management strategy. With its flowers, crucifers attract a large number of insects: pollinators, predators and parasitoids, thus positively affecting the biodiversity of beneficial insects and the biocontrol of harmful ones. The most commonly used multipurpose cover crops are: rapeseed (Brassica napus L.), white mustard (Sinapis alba L.), brown mustard (Brassica juncea (L.) Czern.), charcoal turnip (Brassica rapa rapifera), fodder radish (Raphanus sativus L.), oil radish (Raphanus sativus var. oleifera) and others.Osim pravih žita (Poaceae) i leptirnjača (Fabaceae) koje se najčešće koriste u pokrovnim usevima, zbog svojih bioloških i agronomskih osobina sve više se koriste biljne vrste iz porodice kupusnjača (Brassicaceae). Kupusnjače brzo rastu, imaju veliku produkciju biomase, ostvaruju veliku pokrivenost zemljišta (>80%), a usvajanju i velike količine hranljivih materija. Zbog svega toga, primenom u pokrovnim usevima, povoljno utiču na plodnost zemljišta, sprečavaju njegovu eroziju, guše korove i štite kvalitet podzemnih voda. Većina kupusnjača sadrži glukozinolate, čijom enzimskom konverzijom se u zemljištu oslobađaju biološki aktivna jedinjenja, koja su toksična za zemljišne patogene, nematode i neke korove. Time kupusnjače u zemljištu deluju kao biofumiganti, a ovaj efekat u okviru tehnologije pokrovnih useva koristi se u kontroli štetnih organizama. Zbog različitih sistema proizvodnje i agroekoloških uslova, oslobađanje tih jedinjenja u zemljištu nije konstantno, pa efikasnost nije uvek ista. U tom smislu biofumigaciju kao biološku meru, treba posmatrati kao deo integrisanog pristupa kontrole štetnih organizama. Svojim cvetovima biljne vrste kupusnjača privlače veliki broj insekata: polinatora, predatora i parazitoida, pa tako pozitivno utičući na biodiverzitet korisnih insekata i biokontrolu štetnih. U pokrovnim usevima za različite namene najčešće se koriste: uljana repica (Brassica napus L.), bela slačica (Sinapis alba L.), smeđa slačica (Brassica juncea (L.) Czern.), repa ugarnjača (Brassica rapa rapifera), stočna rotkva (Raphanus sativus L.), uljana rotkva (Raphanus sativus var. oleifera) i druge

A Decade with VAMDC: Results and Ambitions

This paper presents an overview of the current status of the Virtual Atomic and Molecular Data Centre (VAMDC) e-infrastructure, including the current status of the VAMDC-connected (or to be connected) databases, updates on the latest technological development within the infrastructure and a presentation of some application tools that make use of the VAMDC e-infrastructure. We analyse the past 10 years of VAMDC development and operation, and assess their impact both on the field of atomic and molecular (A&M) physics itself and on heterogeneous data management in international cooperation. The highly sophisticated VAMDC infrastructure and the related databases developed over this long term make them a perfect resource of sustainable data for future applications in many fields of research. However, we also discuss the current limitations that prevent VAMDC from becoming the main publishing platform and the main source of A&M data for user communities, and present possible solutions under investigation by the consortium. Several user application examples are presented, illustrating the benefits of VAMDC in current research applications, which often need the A&M data from more than one database. Finally, we present our vision for the future of VAMDC

A decade with vamdc: Results and ambitions

This paper presents an overview of the current status of the Virtual Atomic and Molecular Data Centre (VAMDC) e-infrastructure, including the current status of the VAMDC-connected (or to be connected) databases, updates on the latest technological development within the infrastructure and a presentation of some application tools that make use of the VAMDC e-infrastructure. We analyse the past 10 years of VAMDC development and operation, and assess their impact both on the field of atomic and molecular (A&amp;M) physics itself and on heterogeneous data management in international cooperation. The highly sophisticated VAMDC infrastructure and the related databases developed over this long term make them a perfect resource of sustainable data for future applications in many fields of research. However, we also discuss the current limitations that prevent VAMDC from becoming the main publishing platform and the main source of A&amp;M data for user communities, and present possible solutions under investigation by the consortium. Several user application examples are presented, illustrating the benefits of VAMDC in current research applications, which often need the A&amp;M data from more than one database. Finally, we present our vision for the future of VAMDC.</jats:p

Risk factors for Toxoplasma infection in a reproductive age female population in the area of Belgrade, Yugoslavia

The contribution to Toxoplasma infection of known transmission risk factors such as consumption of undercooked meat, contact with soil, and contact with cats, as well as that of age, degree of education, residence in central vs, suburban city communities, and year of entry into the study, has been investigated in a group of 1157 female residents (age range 15 to 45 years) of a defined geographic area (Belgrade) during a 4-years period (1988-1991). The rate of infection increased with age, ranging from 57 % to 93 %, with an overall mean of 77 %. However, it decreased significantly over the study period (p lt 0.01). Of the potential risk factors examined, regression analysis showed that the following: age (relative risk (RR): 1.18, 95% confidence interval (CI): 1.02-1.37, p = 0.022), undercooked meat consumption (RR: 2.22, 95% CI: 1.2-2.86, p = 0.001), and the year of entry into the study (RR: 0.69, 95% CI: 0.6-0.8, p = 0.000) were significantly associated with infection. However, while the consumption of undercooked meat contributed to the frequency of infection in the whole group, its significance increased with the degree of education but decreased with age, and was greater in women residing in the suburbs. In addition, in women below age 20, exposure to soil (farming, gardening) was significantly associated with infection (RR: 1.38, 95% CI: 1.12-1.97, p = 0.037). Since cats are the single source of toxoplasma oocysts, the above finding indicates that cats are an epidemiologically significant source of environmental contamination in Belgrade. However, cat ownership itself as a criterion of contact with cats was not associated with infection (p = 0.326). In the absence of a general screening in pregnancy program in Yugoslavia, these data point out the groups of pregnant women at the highest risk of infection and provide a basis for a region-appropriate educational program to prevent congenital toxoplasmosis

Mediterranean and central-eastern European countries host viruses of two different clades of plum pox virus strain M

UMR BGPI Equipe 6; Publication Inra prise en compte dans l'analyse bibliométrique des publications scientifiques mondiales sur les Fruits, les Légumes et la Pomme de terre. Période 2000-2012. http://prodinra.inra.fr/record/256699International audienceThe genetic diversity of plum pox virus strain M (PPV-M) was assessed by analyzing 28 isolates collected in 8 European countries. Two genomic fragments spanning the (Cter)P3-6K1-(Nter)CI coding region as well as the full coat protein coding region were sequenced directly from PCR products. Phylogenetic analysis showed that the geographical origin of the collected isolates was clearly associated with two different PPV-M clades. Moreover, the pattern of substitutions in the CP gene shed light on the evolutionary relationships between PPV-M and the recombinant strains PPV-Rec and PPV-T

Solar Mn I 5432/5395 Åline formation explained

We present a solution for the long standing problem concerning the "chromospheric"behaviour of the Mn

Epidemiological relationship between human toxoplasma infection and cats in Belgrade

Toxoplasmosis in one of the most widely spread anthropozoonoses in the world. Being the definitive host of the heteroxenous coccidian parasite Toxoplasma gondii, the cat is the source of infection. The cat may present a source of human infection both via direct contact and indirectly, via exposure to environmental contamination (excretion of oocysts into the soil). To assess the epidemiological relationship between human toxoplasma infection and the cat in Belgrade as a model urban environment, we performed an epidemiological study involving 1157 women of reproductive age residing in Belgrade during a four-year period (1988-1991). The rate of infection increased with age, ranging from 57% to 93%, with an overall mean of 77%. Exposure to soil (farming, gardening) was shown to contribute significantly to infection in the group of women below 20 years of age, indicating that cats are an epidemiologically significant source of environmental contamination in Belgrade. On the other hand, car ownership as a criterion of contact with cats was not shown to contribute significantly to infection in the examined population

Response of antioxidative enzymes to long-term Tomato spotted wilt virus infection and virus elimination by meristem-tip culture in two Impatiens species

Ornamental plants Impatiens hawkerii and Impatiens walleriana are susceptible to Tomato spotted wilt virus infection that can be eradicated by meristem-tip propagation. Comparison of superoxide dismutase (SOD), catalase (CAT), guaiacol peroxidase (GPX) and ascorbate peroxidase (APX) profiles of healthy, infected and virus-eliminated plants showed that long-term infection did not cause major changes in I. hawkerii, but caused induction of several APX and GPX isoforms, increase in Mn-SOD and APX and a decrease in CAT activity in I. walleriana. This is the first report on the effects of virus elimination by meristem-tip propagation on the antioxidative metabolism in plants. (C) 2012 Elsevier Ltd. All rights reserved.Serbian Ministry of Education and Science [TR-31019

Prevalence and genetic structure of PPV-M in six European contries

International audienceThe prevalence of PPV-M, PPV-D and PPV-Rec strains has been evaluated in 6 European countries (Bulgaria, Czech Republic, France, Serbia, Slovakia and Slovenia). A total of 547 samples have been collected from peach, apricot and plum trees and were characterised directly by PCR-based typing procedures targeting two genomic regions located upstream and downstream the recombination breakpoint located in the Nib gene shared by all PPV-Rec isolates. PPV-M isolates were found predominant in 4 of the 6 countries whereas PPV-Rec was detected in all countries but one. The genetic diversity and structure of PPV-M populations in Europe were evaluated by sequencing 27 isolates coming from 8 countries. The existence of 2 sub-clusters within the PPV-M group has been evidenced. This structure is apparently correlated with the geographical origin of the isolates