Estimation of leaf nitrogen concentrations in Quercus robur L. using the CCM-200 portable chlorophyll meter for different patterns of vegetative growth and acorn production     

Krunoslav Sever  Saša Bogdan  Željko Škvorc  Maša Zorana Ostrogović Sever  Jozo Franjić 《New Forests》2016,47(4):513-527

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The effect of different fertigation strategies and furrow surface treatments on plant water and nitrogen use     

Jirka Šimůnek  Keith L. Bristow  Sarah A. Helalia  Altaf A. Siyal 《Irrigation Science》2016,34(1):53-69

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Comparison of two methods for field grow of puncture vine (Tribulus terrestris L.) in Slovakia     

Ivan Šalamon  Vincenzo De Feo 《Acta Agriculturae Scandinavica, Section B - Plant Soil Science》2016,66(3):267-271

One of the most claimed aphrodisiac plant is puncture vine (Tribulus terrestris L.) known as ‘plant Viagra’. This herb, growing especially in South and East Europe, is used for pharmaceutical purposes, due to its content of furostanol saponins which have stimulant effects on natural testosterone levels. Puncture vine grows as a weed on sandy soils areas. A study aimed to the introduction of puncture vine into large cultivation scale was carried out. Two different methods of cultivation were compared and production of biomass and evaluation of the content of furostanol saponins were done. Transplantation of seedlings raised in the greenhouse into the open field was more effective for the production of high amount of biomass and active components than using plants that are directly sown. The transplantation of seedlings into open field is suitable for the puncture vine cultivation as it increases biomass production.  相似文献   

Reactivity of fly ash from copper smelters in an Oxisol: implications for smelter-polluted soil systems in the tropics     

Vojtěch Ettler  Veronika Petráňová  Martina Vítková  Martin Mihaljevič  Ondřej Šebek  Bohdan Kříbek 《Journal of Soils and Sediments》2016,16(1):115-124

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Resistance mechanisms of wild tomato germplasm to infection of Oidium neolycopersici     

Aleš Lebeda  Barbora Mieslerová  Marek Petřivalský  Lenka Luhová  Martina Špundová  Michaela Sedlářová  Vladimíra Nožková-Hlaváčková  David A. C. Pink 《European journal of plant pathology / European Foundation for Plant Pathology》2014,138(3):569-596

Tomato powdery mildew (Oidium neolycopersici) is one of the most devastating diseases of cultivated tomatoes worldwide. Although the first epidemics were recorded more than 25 years ago many aspects of this host-pathogen interaction are still not well understood. Detailed morphological and molecular studies of the anamorphs confirmed that O. neolycopersici is phylogeneticaly close to Erysiphe aquilegiae var. ranunculi. Host range is rather broad, apart from Solanaceae hosts were found in the families Apocynaceae, Campanulaceae, Crassulaceae, Cistaceae, Cucurbitaceae, Linaceae, Malvaceae, Papaveraceae, Pedialiaceae, Scrophulariaceae, Valerianaceae a Violaceae. Non-host resistance within these families is not based on inhibition of formation of primary haustorium, however, on post-haustorial hypersensitive reponse and another type of non-hypersensitive resistance. Screening of wild Solanum species (previous Lycopersicon spp.) germplasm revealed valuable sources of resistance (S. habrochaites, S. pennellii, S. cheesmaniae, S. chilense, S. peruvianum). The main resistance mechanism was found to be a hypersensitive response (HR), in some cases followed by limited development of the pathogen. However, there is a broad variation in resistance response on the histological and cytological level. Interaction between many wild Solanum spp. and O. neolycopersici is race-specific, at least three races were differentiated. In some interspecific crosses (S. lycopersicum × S. habrochaites) adult plant resistance was observed. Biochemical studies focusing on production of reactive oxygen species (ROS) and peroxidase activity during infection of O. neolycopersici showed that production of ROS and activity of corresponding enzymes is related to activation of defence responses in genotypes of wild Solanum sect. Lycopersicon. The significance of nitric oxide (NO) in O. neolycopersici pathogenesis was supported by experiments with NO donors and scavengers. In moderately resistant genotype S. chmielewskii, treatment by heat stress caused slight deceleration of pathogen development, increased production of jasmonic acid (JA) and abscisic acid (ABA) and increased peroxidase activity in infected plants. The different degree of tomato resistance/susceptibility did not markedly change the rate and extent of photosynthetic response to O. neolycopersici; only minimal impairment of photosynthesis was found in both susceptible and moderately resistant genotypes during the first 9 days after inoculation. The accumulated evidence confirm a crucial role of localised increased production of ROS and reactive nitrogen species (RNS) in response to pathogen penetration into plant tissue and its involvement in the plant resistance responses including the initiation and progression of plant cell death in host wild Solanum species. Crucial points of further research are discussed.  相似文献   

Involvement of kaempferol in the defence response of virus infected Arabidopsis thaliana     

Saša Likić  Ivana Šola  Jutta Ludwig-Müller  Gordana Rusak 《European journal of plant pathology / European Foundation for Plant Pathology》2014,138(2):257-271

The roles of several phenolic compounds in plant defence response have been extensively studied, yet little is known about the role of flavonoids in plant-virus interaction. Quantitative and qualitative changes of selected phenolics in Arabidopsis thaliana induced by Cucumber mosaic virus containing satellite RNA (CMVsat) infection were analysed accompanied by plant hormone, chalcone synthase and pathogenesis-related gene expression analysis. Lower leaves of infected plants had a lower concentration of total phenolics compared to control plants. The concentration of kaempferol in upper leaves of all infected plants was significantly lower compared to control plants, while the expression of the chalcone synthase gene in those leaves was in most cases upregulated. All infected plants had a higher concentration of indole-3-acetic acid in lower leaves, which was accompanied with a lower concentration of kaempferol in upper leaves. Our research demonstrates a correlation between kaempferol and indole-3-acetic acid in response to CMVsat infection in Arabidopsis. We demonstrated two different metabolic patterns in infected plants suggesting the activation of two different defence responses. We also propose kaempferol to be an important part of the auxin-dependent defence response which limits systemic movement of CMVsat and that this defence response is activated prior to the well-known salicylic acid dependent defence response. Further research on kaempferol and its role in Arabidopsis-CMVsat interaction will improve our understanding on the role of flavonoids in plant defence.  相似文献   

Occurrence of pathogens in outbreak populations of <Emphasis Type="Italic">Pityokteines</Emphasis> spp. (Coleoptera,Curculionidae, Scolytinae) in silver fir forests     

Milan Pernek  Dinka Matošević  Boris Hrašovec  Mladen Kučinić  Rudolf Wegensteiner 《Journal of pest science》2009,82(4):343-349

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Expression and regulation of programmed cell death‐associated genes in systemic necrosis of PVYNTN susceptible potato tubers          下载免费PDF全文

A. Sedlar  B. Gerič Stare  I. Mavrič Pleško  P. Dolničar  M. Maras  J. Šuštar‐Vozlič  Š. Baebler  K. Gruden  V. Meglič 《Plant pathology》2018,67(5):1238-1252

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Record of a new location for tropical root knot nematode Meloidogyne luci in Slovenia          下载免费PDF全文

B. Gerič Stare  P. Strajnar  S. Širca  N. Susič  G. Urek 《EPPO Bulletin》2018,48(1):135-137

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Identifying sustainable forest management research narratives: a text mining approach     

Andreas Schober  Nenad Šimunović  Andras Darabant  Tobias Stern 《Journal of Sustainable Forestry》2018,37(6):537-554

Although it is obvious that research regarding Sustainable Forest Management (SFM) is context specific and developed over time, not many research papers yet intended to investigate these changes. As a matter of fact, the number of scientific publications addressing SFM is relatively high. Hence, such a wide field cannot be sufficiently covered by traditional literature review approaches. With this paper, we aim at identifying the most convergent narratives within the SFM-research landscape by applying a text mining methodology to recent scientific literature. By doing so, we generated results that indicate that there may have been three phases in the evolution of SFM-research: the early phase covers in particular issues regarding land use in tropical and developing countries. Furthermore, papers in this phase tend to focus on general concepts or policy issues. In contrast, the second phase is characterized by a larger share of publications in forestry focused journals. This process is seemingly connected with issues like forest management, certification, forest stand management and the development of sustainability indicators. A third phase can be observed by the relative downturn of publications in forest-focused journals between 2005 and 2010. A new focus in this period is climate change.  相似文献