Wyniki wyszukiwania - Biblioteka Nauki

1

Estimating the substrate water status using capacitance measurements

100%

Klamkowski K. , Treder W.

Infrastruktura i Ekologia Terenów Wiejskich

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2017

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tom nr II/1

521--533

EN

The suitability of capacitance probes for measuring the actual variations in substrate water content in container-grown ornamental species (Lawson cypress) was examined. The probes were installed in the plant containers. Weighing measurement data on water loss was used to assess the actual changes in substrate water content (plant water use). In an additional test, an evaluation of temperature sensitivity of the capacitance probe was performed under laboratory conditions. The probe was placed in a container containing the growing medium (peat substrate) with a defined (stable) moisture content. The substrate temperature was modified and the changes in probe output were recorded. The experiment demonstrated the existence of the effect of temperature on the quality of soil moisture measurements conducted with the capacitance method. The accuracy of the results obtained from measurements with dielectric sensors in relation to the data obtained by means of weighing platforms depended largely on the temperature profile of the measured medium. It was demonstrated that temperature variations explained 99% of the observed differences in the results of moisture content measured with the capacitance method. Due to the fact that there is no possibility of developing universal factors (for different sensors and substrates) for correcting the influence of temperature, this relationship should be defined independently for a given type of crop and the measuring system available.

2

Regulated deficit irrigation of rhododendrons grown in containers

75%

Matysiak B. , Koniarski M. , Treder W.

Infrastruktura i Ekologia Terenów Wiejskich

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2017

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tom nr II/1

509--519

EN

The effect of deficit irrigation imposed in July-August period on shoot growth and flower formation in container grown rhododendron in commercial nursery were assessed. Plants were exposed to three irrigation regimes based on potential evapotranspiration rates (100% ET0 - well-watered control plants, 75% ET0 - moderate drought and 50% ET0 - severe drought). The values of evapotranspiration were calculated using the Penman-Monteith model. The degree of drought had significant effect on the plant growth and water status of plants. Severe drought inhibited secondary shoot elongation compared to less stressful regime but did not affect flower formation. ‘Catawbiense Boursault’, ‘Nova Zembla’ and ‘Pearce’s American Beauty’ plants exposed to severe drought were shorter, respectively by 39, 45 and 86% than well-irrigated plants and two of the three cultivars ‘Catawbiense Boursault’ and ‘Pearce’s American Beauty’ produced fewer secondary branches (5.9 and 0.3) compared to control plants (9.2 and 1.7, respectively). Moderate drought did not affect plant growth but resulted in flower bud formation in ‘Nova Zembla’ and ‘Pearce’s American Beauty’s cultivars. Estimated water consumption by rhododendrons throughout the whole growing season was reduced by 15% for moderate and 25% for severe drought compared to control, well-watered plants. The results have significant implications for water conserving in commercial production of rhododendrons.

3

Changes in ornamental nursery production following Polish integration with the European Union

63%

Marosz A.

Annals of Warsaw University of Life Sciences - SGGW. Horticulture and Landscape Architecture

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2013

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tom 34

4

Genotypic differences between isolates of Phytophthora cinnamomi Rands and P. citricola Sawada obtained from twelve nursery plant species

51%

Wiejacha K. , Trzewik A. , Orlikowski L. B. , Szkuta G. , Orlikowska T.

Journal of Plant Protection Research

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2004

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tom 44

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nr 3

189-198

EN

Genotypic differentiation among 10 isolates of Phytophthora cinnamomi Rands and 24 isolates of Phytophthora citricola Sawada from 12 different plant species grown in Polish ornamental nurseries was determined. DNA was extracted from pure pathogen cultures and amplified by the PCR technique using ISSR and RAPD primers. 9 primers were used to amplify P. cinnamomi and 8 to amplify P. citricola DNA. The analyzed amplification products were between 300 and 2300 bp. The genotypical differentiation was from 17 to 35% in P. cinnamomi and from 10 to 60% in P. citricola. Isolates from host plants of the same family showed, with some exceptions, similar levels of differentiation.

PL

Analizowano zróżnicowanie genotypowe 10 izolatów P. cinnamomi i 24 izolatów P. citricola, wyosobnionych z porażonych roślin (cis, cyprysik, jodła, mikrobiota, świerk, żywotnik, bagno, bażyna, różanecznik, wrzos, buk) oraz izolatów referencyjnych dla gatunków. DNA izolowano z czystych kultur i prowadzono analizę produktów powielania metodą PCR (Polymerase Chain Reaction), przy zastosowaniustarterów typuISSR (Inter Simple Sequence Repeat) i RAPD (Random Amplified Polymorphic DNA). Do analizy P. cinnamomi zastosowano 9 starterów, a do P. citricola 8 starterów. Analizowane produkty amplifikacji mieściły się w zakresie od 300 do 2 300 pz. Zróżnicowanie genotypowe pomiędzy izolatami P. cinnamomi było od 17 do 35% a pomiędzy P. citricola od 10 do 60%. Izolaty z roślin należących do jednej rodziny, wykazywały, z nielicznymi wyjątkami, podobny poziom zróżnicowania.

5

Phytophthora spp. in Polish ornamental nurseries. I. Perennial plants, new hosts of P. cryptogea

51%

Orlikowski L. B. , Ptaszek M.

Journal of Plant Protection Research

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2007

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tom 47

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nr 4

401-408

EN

Phytophthora cryptogea was isolated from diseased stem base of Aquilegia discolor and rotted leaves of Saxifraga and Sempervivum spp. Additionally, Fusarium species and Botrytis cinerea were frequently isolated from diseased parts of plants. Most of Sempervivum species and cultivars except S. soculiferum were colonized in laboratory conditions by P. cryptogea. The isolates from Alstroemeria aurantiaca, Gerbera jamesonii, Saxifraga arendsii, S. paniculata, Sempervivum arachnoideum colonised houseleek leaves with the fastest spread of necrosis on plant parts inoculated with cultures from Gerbera and S. arendsii. The isolate from S. arendsii colonized 5 species and cultivars of saxifrage as well as Iberis sempervivum, Lavendula angustifolia, Sempervivum sobuliferum and Vinca minor with the slowest development on periwinkle. In laboratory trials isolate of P. cryptogea from houseleek grew on PDA and colonized leaves of that plant at temperature ranging from about 10 to 32.5°C with optimum at 20-30°C.

PL

Phytophthora cryptogea izolowano z porażonej podstawy pędów i liści Aquilegia discolor, Saxifraga arendsii i Sempervivum spp. Dodatkowo, z tkanek niektórych roślin izolowano gatunki rodzaju Fusarium i Botrytis cinerea. Większość gatunków i odmian rojnika, poza S. soculiferum, było kolonizowanych w warunkach laboratoryjnych przez P. cryptogea. Izolaty tego gatunku z Alstroemeria aurantiaca, Gerbera jamesonii, Saxifraga arendsii, S. paniculata i Sempervivum arachnoideum, kolonizowały liście rojnika, przy czym nekroza rozwijała się najszybciej na blaszkach liściowych zainokulowanych kulturami z G. jamesonii i S. arendsii. Izolat z S. arendsii kolonizował liście 5 gatunków i odmian skalnicy oraz Iberis sempervivum, Lavendula angustifolia, Sempervivum sobuliferum i Vinca minor przy czym nekroza rozwijała się najwolniej na barwinku. W badaniach laboratoryjnych izolat P. cryptogea z rojnika rozwijał się na pożywce PDA oraz kolonizował liście S. arachnoideum w zakresie temperatury od około 10 do 32,5°C przy optimum 20-30°C.

6

Relationship between source of water used for plant sprinkling and occurrence of Phytophthora shoot rot and tip blight in container-ornamental nurseries

51%

Orlikowski L. B.

Journal of Plant Protection Research

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2006

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tom 46

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nr 2

163-168

EN

Phytophthora citricola Sawada was detected from 3 water pools situated in 2 container- grown nurseries. The highest number of spots on rhododendron leaves were observed in June whereas the lowest in October. The use of water for plant sprinkling caused browning, yellowing of shoots and root rot of Buxus sempervirens, and blight of shoot tips of Thuja occidentalis and Rhododendron sp. The disease symptoms were observed already in June and the disease developed till the first decade of October. Losses caused by the species varied from 9 to 56%.

PL

Badania prowadzono w dwóch pojemnikowych szkółkach roślin ozdobnych. Z trzech zbiorników wodnych, usytuowanych poniżej poziomu szkółek, do których spływa nadmiar wody z kontenerowni, izolowano Phytophthora citricola. Stosując liście różanecznika jako pułapki do wykrywania tego czynnika chorobotwórczego, izolowano go z wody w okresie od czerwca do października. Najwięcej plam na liściach stwierdzano w czerwcu, natomiast najmniej w październiku. Na bukszpanie podlewanym wodą z jednego ze zbiorników stwierdzano symptomy żółknięcia pojedynczych pędów, rozszerzające się stopniowo, ich brązowienie i następnie słomkowe zabarwienie liści. Na żywotniku „Fastigiata” obserwowano brązowienie i zamieranie wierzchołków pędów na długości do 10 centymetrów. Na wierzchołkach pędów różanecznika występowały plamy na liściach rozszerzające się na całe blaszki oraz na łodygi. Z porażonych tkanek izolowano P. citricola. Objawy chorobowe zanotowano na 9–56% roślin, przy czym zgniliznę pędów obserwowano najczęściej na żywotniku.

7

Eriophyoid mites [Acari: Eriophyoidea] occurring on lime trees in ornamantal nurseries

44%

Soika G.

Biological Letters

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2006

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tom 43

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nr 2