Search results for "SPP"
showing 10 items of 178 documents
LIELĀS PERGAMENTSĒNES PHLEBIOPSIS GIGANTEA (FR.) JÜL. IZOLĀTU ATTĪSTĪBA PARASTĀS EGLES PICEA ABIES (L.) KOKSNĒ
2022
Skujkoku mežos Eiropas savienībā, tai skaitā Latvijā, būtiskus zaudējumus izraisa sakņu piepes Heterobasidion spp. izraisošā sakņu un stumbra trupe. Šīs sēnes antagonists lielā pergamentsēne (Phlebiopsis gigantea (Fr.) Jülich.) tiek izmantota svaigu celmu apstrādei, lai ierobežotu sakņu piepes infekciju un tās izplatību. Tiek izmantotas dažādas lielās pergamentsēnes oīdiju suspensijas, taču ilgtermiņā izmantojot preparātus, kuru sastāvā ir viens sēnes izolāts, var tikt ietekmēta celmu kolonizējošo sēņu daudzveidība. Pierādīts, ka vietējās izcelsmes P. gigantea izolāti ir efektīvāki Heterobasidion spp. infekcijas ierobežošanā kā Somijā izstrādātais bioloģiskais preparāts Rotstop. Pētījuma mē…
Pārtikas patogēno baktēriju sastopamība dīgstos un diedzētu sēklu produktos
2019
Pieaugot patērētāju pieprasījumam pēc minimāli apstrādātu produktu lietošanas uzturā, pārtikas drošība ir aktuāla un svarīga, īpaši tādiem termiski neapstrādātiem produktiem kā dīgsti. Eiropā Salmonella spp. un Šiga jeb verotoksīnus producējošā Escherichia coli (STEC) ir visbiežāk minētās patogēnās baktērijas, kas izraisījušas uzliesmojumus, kas asociēti ar kontaminētiem dīgstiem. STEC patogenitāti nodrošina patogenitātes gēni stx1, stx2, bet viens no virulences faktoriem kodēts gēnā eaeA. Listeria monocytogenes ir ievērojams piesārņotājs pārtikā, arīdzan tā ir tipiska augsnes baktērija. Jaunākie pētījumi apraksta ne tikai L. monocytogenes, bet arī Listeria innocua patogenitāti. Pētījumā an…
The impact of wood-derived biochar on the survival of Trichoderma spp. and growth of Secale cereale L. in sandy soil
2018
The interrelations between biochar (BC) and soil microbiota remain unclear. Addressing this will be important for understanding how BC affects soil properties and plant growth. Here, we tested the ...
Automatic Segmentation Using a Hybrid Dense Network Integrated With an 3D-Atrous Spatial Pyramid Pooling Module for Computed Tomography (CT) Imaging
2020
Computed tomography (CT) with a contrast-enhanced imaging technique is extensively proposed for the assessment and segmentation of multiple organs, especially organs at risk. It is an important factor involved in the decision making in clinical applications. Automatic segmentation and extraction of abdominal organs, such as thoracic organs at risk, from CT images are challenging tasks due to the low contrast of pixel values surrounding other organs. Various deep learning models based on 2D and 3D convolutional neural networks have been proposed for the segmentation of medical images because of their automatic feature extraction capability based on large labeled datasets. In this paper, we p…
Evolution of qualitative characteristics during blueberry fruit storage in a modified atmosphere
2015
The objective of this work was to evaluate the performance of different films to maintain MAP conditions for storing ‘Duke’ blueberries by verifying the evolution of qualitative traits of berries. The fruits were picked manually, individually deposited in polyethylene baskets and immediately transferred (1 h) to the laboratory under chilled conditions (10°C). The experimental storage units consisted of a pallet bag of two different types of film, polyethylene (100 μm) and a biobased film derived from starch (50 μm). The O2 and CO2 transmission rates, measured according to the ASTM F 2622-08 and ASTM F 2476-05 methods at 38°C and 90% RH, were, 2642 and 10654 [cm3/(m2·24 h)], respectively, fo…
Spatial variability of ecophysiological performances and invasive potential of alien acacias (Acacia spp.) in Sicily and Lampedusa island (Pelagie Ar…
2012
Acacia spp. are among the most widespread and prominent invaders within Mediterranean-type ecosystems, where have already shown the capability to deeply change the characters and the functioning of invaded ecosystems (like in Portugal or S Africa: e.g. Holmes & Cowling, 1997; Hellmann et al., 2011). In Sicily, just in the last few years, two Australian Acacias, notably Acacia cylops A. Cunn. ex G. Don and A. saligna (Labill.) H.L.Wendl., started to regenerate abundantly within different areas (especially afforested sites). However their naturalization process has not been studied up to now.
Incidence of grapevine moth Lobesia botrana (Den. & Schif.) on occurrence of ochratoxin A in grapes
2008
Observations were carried out in an organic vineyard (cv malvasia di candia), at salemi (sicily), during 2006-2007, in order to verify the influence of grapevine moth lobesia botrana (den. & schif.) on presence of ochratoxin a (ota) in bunches at harvest time. a percentage of 12.98% of bunches were attacked by grape moth during 2006, while 8.65% of them were infected by grey mould and sour bunch rot (5.77% and 2.88% respectivelly). analyses carried out on 12.98% infested bunches, showed a level of 20 μg/kg of ota, while on intact samples 0.04 μg/kg of toxin was registered. During 2007, infestation of bunches by grape moth was very low (2.05%), due to the particular climatic conditions, and …
Underestimated impact of Red Palm Weevil introduction on iandscape biodiversity: the help of the molecular tools
2012
Alien species have been introduced both accidentally and intentionally. The last are and have been motivated by economic, environmental and social considerations (NOBANIS, 2010), as in the case of many palm species (Phoenix canariensis, P. dactylifera, Washingtonia filifera, W. robusta) in Sicily. These Arecaceae are important in the urban areas and they contribute to the typical Sicilian Panorama. On the other hand the accidental introduction of invasive alien species can be one a cause of the loss of native biodiversity, especially severe on islands and other isolated ecosystems. Phytophagous insects can cause biodiversity losses and may also have a strong impact on the economy of the isl…
MOLECULAR ANALYSIS OF COLLETOTRICHUM SPECIES ASSOCIATED TO OLIVE IN CALABRIA.
2013
A new molecular approach based on the use of genus-specific primers targeting the internal transcribed spacer (ITS) regions of rDNA, was developed and used to study the diversity of Colletotrichum species associated with the olive canopy in the Gioia Tauro plain (Calabria, southern Italy). Representative symptomatic and symptomless samples of leaves, flowers and fruits were collected during 2012 and analyzed by extracting total DNA and amplifying the target region with the genus-specific primers. Amplicons were cloned and sequenced in order to use the ITS as a barcode gene. No Colletotrichum species were detected in the first sampling period (May 28, 2012), whereas around 15% of the analyze…
Interactions between Bacillus amyloliquefaciens AG1 and Aspergillus spp. contaminating food and feedstuffs
2022
Aspergillus is a widespread fungal genus contaminating and degrading food and feeds mostly during storage. Some species can also produce carcinogenic mycotoxins harmful for human and animal health. In this study, Bacillus amyloliquefaciens AG1 (BaAG1), active against fungal pathogens was evaluated by in vitro tests against seven Aspergillus species belonging to six Aspergillus sections. After 7 days of incubation at 25°C, mycelial growth of all fungal species was reduced from 46.53% to 60.92%, compared to the controls. The inhibitory effect of BaAG1 cell-free culture filtrate was tested by turbidimetric measurements by using ScanReady P-800 that allow the automatic and continuous monitoring…