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Tytuł:
Predicting wheat stripe rust epidemics according to influential climatic variables
Autorzy:
Naseri, B.
Sharifi, F.
Powiązania:
https://bibliotekanauki.pl/articles/2084878.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cereals
climate
epidemiology
yellow rust
Opis:
From 2009 to 2018, a total of 80 wheat crops were studied at plot and regional scales to predict stripe rust epidemics based on influential climatic indicators in Kermanshah province, Iran. Disease onset time and epidemic intensity varied spatially and temporarily. The disease epidemic variable was classified as having experienced nonepidemic, moderate or severe epidemics to be used for statistical analysis. Principal component analysis (PCA) was used to identify climatic variables associated with occurrence and intensity of stripe rust epidemics. Two principal factors accounting for 70% of the total variance indicated association of stripe rust epidemic occurrence with the number of icy days with minimum temperatures below 0°C (for subtropical regions) and below −10°C (for cool temperate and semi-arid regions). Disease epidemic intensity was linked to the number of rainy days, the number of days with minimum temperatures within the range of 7−8°C and relative humidity (RH) above 60%, and the number of periods involving consecutive days with minimum temperature within the range of 6−9°C and RH% > 60% during a 240-day period, from September 23 to May 21. Among mean monthly minimum temperatures and maximum relative humidity examined, mean maximum relative humidity for Aban (from October 23 to November 21) and mean minimum temperature for Esfand (from February 20 to March 20) indicated higher contributions to stripe rust epidemic development. Confirming PCA results, a multivariate logit ordinal model was developed to predict severe disease epidemics. The findings of this study improved our understanding of the combined interactions between air temperature, relative humidity, rainfall, and wheat stripe rust development over a three-season period of autumn-winter-spring.
Źródło:
Journal of Plant Protection Research; 2019, 59, 4; 519-528
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Appraisal of wheat germplasm for adult plant resistance against stripe rust
Autorzy:
Saleem, K.
Arshad, H.M.I.
Shokat, S.
Atta, B.M.
Powiązania:
https://bibliotekanauki.pl/articles/66682.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
appraisal
wheat
germplasm
plant resistance
stripe rust zob.yellow rust
yellow rust
food security
plant disease
Opis:
The resurgence of wheat stripe rust is of great concern for world food security. Owing to resistance breakdown and the appearance of new virulent high-temperature adapted races of Puccinia striiformis f. sp. tritici (Pst), many high yielding commercial varieties in the country lost their yield potential. Searching for new sources of resistance is the best approach to mitigate the problem. Quantitative resistance (partial or adult plant) or durable resistance is reported to be more stable than race specific resistance. In the current perusal, a repertoire of 57 promising wheat lines along with the KLcheck line Morocco, developed through hybridisation and selection of local and international lines with International Maize and Wheat Improvement Center (CIMMYT) origin, were evaluated under natural field conditions at Nuclear Institute for Agriculture and Biology (NIAB) during the 2012−2013 and 2013−2014 time periods. Final rust severity (FRS), the area under the rust progress curve (AURPC), the relative area under the rust progress curve (rAURPC), and the coefficient of infection (CI) were unraveled to infer the level of quantitative resistance. Final rust severity was recorded when the susceptible check exhibited 100% severity. There were 21 lines which were immune (no disease), 16 which were resistant, five moderately resistant, two resistant-to-moderately resistant, one moderately resistant-to-moderately susceptible, 5 moderately susceptible-to-susceptible, one moderately susceptible, and six exhibited a susceptible response. Nevertheless, 51 lines exhibited a high level of partial resistance while the three lines, NW-5- -1212-1, NW-7-30-1, and NW-7-5 all showed a moderate level of partial resistance based on FRS, while 54 lines, on the basis of AURPC and rAURPC, were identified as conferring a high level of partial resistance. Moreover, adult plant resistance was conferred by 47 wheat lines, based on CI value. It was striking that, 13 immune lines among 21 were derived from parents of CIMMYT origin. Cluster analysis was executed to determine the diversity among the wheat genotypes based on stripe rust resistance and yield parameters. All genotypes were grouped into nine clusters exhibiting a high level of diversity at a 25% linkage distance. There were 29 wheat lines resistant to stripe rust that were grouped into the first three clusters, while 4 high-yielding lines were in Cluster VIII. The susceptible check, Morocco, was separated from rest of lines and fell in the last cluster i.e. Cluster IX. Based on the results, inter-crossing immune/ resistant lines is recommended, and with high yielding lines − it is also recommended that cultivars with improved disease resistance and yield potential be developed.
Źródło:
Journal of Plant Protection Research; 2015, 55, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation and identification of zinc ions and heparin binding proteins in yellow fraction of the red deer Cervus Elaphus L. semen
Autorzy:
Orzołek, A.
Dyrda, K.
Rafalska, K.
Wysocki, P.
Kordan, W.
Giżejewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2087223.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
red deer
yellow fraction
ZnBPs
HBPs
proteomics
Źródło:
Polish Journal of Veterinary Sciences; 2021, 24, 1; 69-78
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Yellow pea (Pisum sativum) and its products as a source of natural antioxidants. Part I. Model investigations of antioxidant properties of peas
Groch (Pisum sativum) i produkty jego przerobu jako źródło naturalnych przeciwutleniaczy. I. Badania modelowe właściwości przeciwutleniających grochu
Autorzy:
Grześkowiak, B.
Pazola, Z.
Gogolewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1398903.pdf
Data publikacji:
1987
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
yellow pea
natural antioxidants
lard
rapeseed oil
Opis:
It was found that yellow pea increased the stability of lard and of low erucic acid rapeseed oil. Fractions obtained from pea by extraction with solvents of various polarity demonstrated a distinct decrease of antioxidant properties. The greatest amounts of substances with antioxid.ant activity were extracted with ethanol, less by petroleum ether, and the smalest amounts by water.
Badano wpływ nasion 3 odmian grochu: Kaliski, Flawanda i Wiktoria na szybkość utleniania smalcu oleju rzepakowego niskoerukowego w temp. 60°C oraz smalcu w temp. 20°C. W celu wyodrębnienia naturalnych przeciwutleniaczy z grochu użyto: eteru naftowego 960/o etanolu i wody destylowanej. Zastosowano ekstrakcję prostą jednostopniową ekstrakcję trzystopniową frakcjonowaną kolejno rozpuszczalnikami o rosnącej polarności oraz kolejno rozpuszczalnikami o malejącej polarności. Badano efektywność przeciwutleniającą uzyskanych wyciągów i pozostałości po ekstrakcji w stosunku do smalcu w temp. 60°C. Stwierdzono, że groch wykazuje silne właściwości przeciwstawiające w stosunku do smalcu i oleju rzepakowego niskoerukowego, które rosną wraz ze zwiększeniem ilościowego dodatku do tłuszczu, a jego efektywność przeciwutleniająca jest cechą odmianową (tab. 1). W czasie ekstrakcji rozpuszczalnikami o różnej polarności zdecydowaną większość antyoksydantów grochu ulega unieczynnieniu (rys.). Największe ilości substancji wykazujących właściwości przeciwutleniające rozpuszczają się w etanolu, mniejsze w eterze naftowym, a najmniejsze w wodzie. Wśród związków aktywnych wyciągów etanolowych otrzymanych metodą ekstrakcji prostej znaczną część stanowią również substancje rozpuszczalne w eterze naftowym.
Źródło:
Acta Alimentaria Polonica; 1987, 13, 2; 133-140
0137-1495
Pojawia się w:
Acta Alimentaria Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Packed-Bed Column Adsorption of Metanil Yellow (MY) from Simulated Wastewater using Granular NaOH-Activated Carbon from Cassava (Manihot esculenta) Peels
Autorzy:
Isiuku, B. O.
Horsfall Jr., M.
Powiązania:
https://bibliotekanauki.pl/articles/1113587.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Adsorption
cassava peels
fixed-bed
metanil yellow
modeling
Opis:
The ability of NaOH-activated carbon derived from cassava peels waste to remove MY from aqueous solution was carried out in a fixed-bed column adsorber. The parameters studied included initial solution concentration, Co, carbon bed height and volume flow rate. The temperature of operation and initial solution pH were 29 °C and 5.32, respectively. The optimum adsorption capacity, qe 4.12 mg/g was obtained at Co 10mg/L, bed height 10cm and flow rate, 13.3ml/min. Experimental data were analyzed with Langmuir, Freundlich and Temkin isotherm, as well as the Thomas, Yoon-Nelson and Clark kinetic models. All the models were good fits for experimental data based on correlation coefficient, R2 values. The ΔGads and Freundlich n (1.587) show that the biosorption was spontaneous, good and physical. Results show that NaOH-activated carbon from cassava peels has low capacity to remove MY from aqueous solutions.
Źródło:
World News of Natural Sciences; 2017, 14; 11-35
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of the concept of policy networks in the study of relations between national parliaments and the EU institutions
Autorzy:
Marta, Witkowska,
Powiązania:
https://bibliotekanauki.pl/articles/894518.pdf
Data publikacji:
2020-03-20
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
policy networks
national parliaments
political dialogue
yellow card
Opis:
The article examines the relationship between national parliaments and the EU institutions from the perspective of the concept of policy networks. We verified the hypothesis that the varied and complex forms of cooperation between national parliaments and EU institutions developed through good practices and self-organisation had positive impact on the political processes of the EU. The studied policy networks were analysed for: determining the limits, the level of integration and openness, the nature of existing relationships, the causes of network creation and ultimately the impact of these networks on the political processes taking place in the EU.
Źródło:
Przegląd Europejski; 2016, 4 (42); 56-73
1641-2478
Pojawia się w:
Przegląd Europejski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of growth regulators on selected morphological features of yellow pine
Autorzy:
Jankowski, K
Sosnowski, J.
Wilk, A.
Malinowska, E
Wiśniewska-Kadżajan, B
Powiązania:
https://bibliotekanauki.pl/articles/123177.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
biostymulants
Moddus 250-EC
Asahi SL
yellow pine
Opis:
The aim of study was to compare the effects of two growth regulators on selected mor-phological features of yellow pine. In April 2012, 9 plants of yellow pine Lawson variety were planted to the soil. In April 15, 2013 a research agent in a form of following growth regulators: Asahi SL and Moddus 250-EC was introduced. There were the following experimental objects: C – control (only water spraying), As – Asahi spraying, Md – Moddus spraying. The tested features were: increase in plant height (cm), the increase in needle length (cm) of yellow pine. Measurements of increases in length of needles were made in each case on the same specially marked parts of the plants and performed on 27th of each month from beginning of May to ending of September. Among the used of growth regulators the greatest influence on the height increase of the tested trees as well as on the needle length of yellow pine more affected regulator Moddus. The largest total increase in the needles length of yellow pine was on the object with Modus and Asahi, and on control object it was significantly lower than on objects with growth regulators.
Źródło:
Journal of Ecological Engineering; 2014, 15, 4; 105-108
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First report of yellow sugarcane aphid Sipha flava Forbes (Homoptera: Aphididae) in Tanzania
Autorzy:
January, B.
Yusufu, A.
Urassa, F.
Powiązania:
https://bibliotekanauki.pl/articles/2082756.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graminaceous plants
Sipha flava
sugarcane
yellow sugarcane aphid
Opis:
The yellow sugarcane aphid (YSA), Sipha flava Forbes (Homoptera: Aphididae) is an inva- sive insect pest of many graminaceous plants which include cultivated crops, like sorghum, sugarcane, rice, maize and several species within non-cultivated genera e.g. Digitaria, Pani- cum, Paspalum, and Pennisetum. A survey conducted in the Kagera region indicated an infestation by YSA in nine sugarcane varieties grown. This pest causes damage to leaves leading to yellow, purple and red discoloration. This is the first report of YSA infestation in the Tanzanian sugarcane industry. Efforts to develop control measures are still in progress.
Źródło:
Journal of Plant Protection Research; 2020, 60, 3; 320-322
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative analysis of Yellow Head Virus (YHD) diagnostic methods adopted in Sri Lanka to investigate the accuracy and specificity of the virus
Autorzy:
Amarakoon, A. A. D. Gayathri U.
Wijegoonawardane, P. K. M.
Powiązania:
https://bibliotekanauki.pl/articles/1182758.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Aquaculture
OIE
Penaeus monodon
RNA
Yellow head virus
Opis:
Yellow head virus is a common viral pathogen which infects cultured Penaeus monodon world-wide, resulting in immature larvae and the growth retardation. Therefore, several detection methods are recommended by the Office des Epizootics (OIE) for use in Asia including Sri Lanka. This study was attempted to evaluate the RT-PCR diagnostic method is the appropriate and accurate YHV detection method which is recommended by the OIE comparing with histological identification and haemolymph Smear method. A total of 150 individuals of Penaeus monodon, post larve samples obtained from different shrimp hatcheries located in Northwestern province were screened for the presence of YHV and the results were comparatively analyzed with three different protocols, namely wet mount observation, histopathological observation and RT- PCR detection. Highest prevalence was recorded with wet mount observations (78%) and the lowest was recorded using histopathology (22%). Comparison of PCR tests generated consisted of positive samples 31/51 (2010), 38/65(2011) and 18/34 (2012) respectively. The results obtained with the IQ2000 commercial kit, were the most reliable and it indicated 56.6% average prevalence of YHV.
Źródło:
World Scientific News; 2017, 66; 181-192
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Apogastrostyla rigescens (Kahl, 1932) gen. nov., comb. nov. (Ciliophora, Hypotricha): Morphology, Notes on Cell Division, SSU rRNA Gene Sequence Data, and Neotypification
Autorzy:
LI, Liqiong
HUANG, Jie
SONG, Weibo
SHIN, Mann Kyoon
AL-RASHEID, Khaled A. S.
BERGER, Helmut
Powiązania:
https://bibliotekanauki.pl/articles/763788.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
China, ecology, Hemigastrostyla, infraciliature, ontogenesis, Spirotricha, Stichotrichia, Yellow Sea
Opis:
The morphology, the infraciliature, some stages of cell division and physiological reorganization, and the SSU rRNA gene sequence of the little-known marine 18-cirri hypotrich Tachysoma rigescens (Kahl, 1932) Borror, 1972 [basionym Oxytricha (Tachysoma) rigescens], isolated from mariculture waters near Qingdao, China, were investigated. This rare species is characterized, inter alia, by narrowly spaced, small, colourless cortical granules and several conspicuous ring-shaped structures in the cytoplasm. The caudal cirri and the simple dorsal kinety pattern (three bipolar kineties) are probably plesiomorphic traits within the Hypotricha, the composition of the adoral zone of the proter from new and parental membranelles, as well as the presence of two ‘extra’ cirri behind the right marginal row strongly suggest a misclassification in Tachysoma. The SSU rRNA gene sequence data indicate that T. rigescens branches off rather basally in the Hypotricha tree, which supports the hypothesis that the 18-cirri pattern occurred very early, probably already in the last common ancestor of the Hypotricha. A detailed survey of the early branching 18-cirri hypotrichs and similar taxa (e.g. Trachelostyla pediculiformis, Hemigastrostyla enigmatica, Protogastrostyla pulchra) reveals that for T. rigescens a new genus (Apogastrostyla gen. nov.) has to be established, because there are important differences, inter alia, in the dorsal infraciliature. Besides the type species, A. rigescens comb. nov., which seems to be confined to the northern hemisphere according to the sparse faunistic data, a second marine species, A. szaboi comb. nov. (basionym Hemigastrostyla szaboi), so far only twice recorded from the Antarctic region, can be included. The Chinese population is fixed as neotype to define the species objectively, because no type material of A. rigescens is present and the original type locality is not known. The species name Tachysoma multinucleate is emended: Tachysoma multinucleatum nom. corr.
Źródło:
Acta Protozoologica; 2010, 49, 3
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Protestation and the Search for Redress in Chimamanda Adichie’s Purple Hisbiscus and Half of a Yellow Sun
Autorzy:
Ike, Onyeka
Powiązania:
https://bibliotekanauki.pl/articles/2129791.pdf
Data publikacji:
2021-12-30
Wydawca:
Akademia Pedagogiki Specjalnej. Language and Society Research Committee
Tematy:
Protest
Half of a Yellow Sun
Nigeria
Literature
Injustice
Opis:
This study evaluates Adichie’s Purple Hibiscus and Half of a Yellow Sun as vociferous protestations and call for redress concerning diverse forms of historical and contemporary misrule, inequalities and injustices in the Nigerian society and beyond. Thus Adichie is not just a feminist but also a humanist who is genuinely concerned with the predicaments of the subaltern in the hands of their powerful oppressors. Using New Historicism as a theoretical parameter, the study posits that several factors that resulted to conflict situations and discontent in the past in certain societies are still prevalent in contemporary times, hence the continuous agitations from various ethnic nationalities and sections of such domains, particularly in Nigeria, Adichie’s country of birth. This demonstrates that injustice and oppression perpetrated anywhere can only be laid to rest when they are sincerely redressed with nothing else but justice. The study, therefore, avers that several unresolved historical injustices and ills raised in the novels be resolutely redressed by the contemporary leaderships in those jurisdictions, and where necessary make appropriate reparations, restitution or tender decisive apologies. Doing so in the right manner will invariably contribute to global peace and stability. This implies that for lasting peace to reign in the concerned domains, several issues bordering on historical and modern-day injustices, misrule, human rights abuses, ethnic, racial and religious rivalry, etc., of which the novelist has consistently raised eloquent protestations through her fictions under study should be given serious positive attention and redress in the interest of all.
Źródło:
Language, Discourse & Society; 2021, 9 (2); 89-103
2239-4192
Pojawia się w:
Language, Discourse & Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Approaches to efficient use and to increase the diversity of genetic resources for the development of prospective breeding materials of yellow-seeded Brassica napus L. for conditions of Siberia
Problemy uzycia i poszerzania zmiennosci genetycznej rzepaku zoltonasiennego dla otrzymania wyjsciowych materialow hodowlanych Brassica napus L. dostosowanych do warunkow Syberii
Autorzy:
Potapov, D A
Osipova, G.M.
Powiązania:
https://bibliotekanauki.pl/articles/833634.pdf
Data publikacji:
2005
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
oilseed rape
yellow seed
yellow-seeded oilseed rape
Siberia
genetic diversity
crop quality
Brassica napus
database
breeding material
genetic resource
breeding condition
Źródło:
Rośliny Oleiste - Oilseed Crops; 2005, 26, 2; 335-347
1233-8273
Pojawia się w:
Rośliny Oleiste - Oilseed Crops
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Batch Removal of Metanil Yellow (MY) from Aqueous Solution by Adsorption on HNO3-Treated-H3PO4-Activated Carbon (NATPAAC) from Gmelina arborea Roxb.: Kinetic and Mechanism Studies
Autorzy:
Isiuku, B. O.
Onyema, M. O.
Powiązania:
https://bibliotekanauki.pl/articles/1113804.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Activated carbon
Gmelina arborea
adsorption
kinetic models
metanil yellow
Opis:
As metanil Yellow dye is removed from aqueous solution by batch adsorption on NATPAAC derived from G. aborea bark, we studied the effects of initial dye concentration (Co), initial pH and adsorbent dosage at 29 °C. The experimental equilibrium adsorption capacities (qe) obtained, were 2.35, 1.00 and 0.48 mg/g for Co 25, 50 and 100 mg/L, respectively. The kinetics and mechanism of the adsorption were then modeled by fitting experimental data into the pseudo-second order (PSO), Based on correlation coefficient R2 (> 0.95) values, results show that the PSO and Elovich models simulated experimental data well, but the PSO model simulated it the best. The Boyd model confirmed that the adsorption process was controlled by liquid film diffusion and the effective diffusion coefficients were very low. Moreover, the qe values decreased with increase in Co, increase in pH and increase in adsorbent dosage. However, the removal of MY from aqueous solution was very low. In addition, treatment of carbon with dilute HNO3 had no favorable impact.
Źródło:
World News of Natural Sciences; 2017, 13; 10-26
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of the Chinese Diaspora in the U.S. on the American View of China
Autorzy:
Misiuna, Jan
Powiązania:
https://bibliotekanauki.pl/articles/648543.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Chinese Americans
immigration
Model Minority
Yellow Peril
immigration law
Opis:
The first Chinese immigrants arrived in the United States in the 1820s and initially their presence did not result in improving the American perception of China. On the contrary – intense immigration from China led to the development of racist and xenophobic attitudes towards the Chinese (Yellow Peril), which culminated in the Chinese Exclusion Act of 1882. During the Second World War, China became an important ally of the United States, which triggered a succession of changes to laws barring Chinese immigration (Magnuson Act). Contemporary Chinese Americans – particularly Taiwanese Americans – can be located in the upper spheres of immigrant population: they are considered to be a well-educated and affluent group. This paper presents the historical and contemporary socio-economic characteristics of the Sino-American population set against a historical and legal background.
Źródło:
International Studies. Interdisciplinary Political and Cultural Journal; 2018, 22, 1
1641-4233
2300-8695
Pojawia się w:
International Studies. Interdisciplinary Political and Cultural Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Redefinition and Reassignment of the 18-cirri Genera Hemigastrostyla, Oxytricha, Urosomoida, and Actinotricha (Ciliophora, Hypotricha), and Description of One New Genus and Two New Species
Autorzy:
Shao, Chen
Song, Weibo
Al-Rasheid, Khaled A. S.
Berger, Helmut
Powiązania:
https://bibliotekanauki.pl/articles/763642.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
China, Heterooxytricha gen. nov., review, Spirotricha, Stichotrichia, Yellow Sea
Opis:
The morphology, the infraciliature, and two stages of physiological reorganization of Hemigastrostyla elongata spec. nov.,isolated from the Yellow Sea near Qingdao (China), are described. The new species differs from the type H. stenocephala, inter alia, by the length of the dorsal bristles and the position of the pretransverse ventral cirri; from H. enigmatica by the number of caudal cirri; and from H. para-enigmatica spec. nov. – established for the H. enigmatica populations from the Yellow Sea – by the arrangement of the postoral ventral cirri and the cortical granulation. A key to the Hemigastrostyla species and some other 18-cirri hypotrichs is provided. Hemigastrostyla szaboi is fixed as type species of Heterooxytricha gen. nov. because the type population lacks the extra cirri which are characteristic for Hemigastrostyla. In addition, Oxytricha geleii is assigned to this new genus, whose species have, like many oxytrichids, 18 frontal-ventraltransverse cirri, but a Gonostomum dorsal kinety pattern. The old, large, and difficult genus Oxytricha is briefly reviewed, mainly on the basis of the dorsal kinety pattern. Very likely, only species with the Oxytricha pattern belong to this genus. Oxytricha marcili and O. pseudofurcata, which have the Urosomoida kinety pattern (i.e. kinety 3 fragmentation lacking), are transferred to Urosomoida which is, inter alia, defined by a more or less distinctly reduced number of ventral and transverse cirri. Some other Oxytricha species with this kinety pattern (O. islandica, O. lanceolata, O. pseudosimilis, O. setigera) are not transferred to Urosomoida, but preliminarily classified as incertae sedis in Oxytricha, because they have the full set of 18 cirri. The available molecular data on O. lanceolata indicate that this type of 18-cirri hypotrichs likely needs a genus of its own because O. lanceolata does not cluster with O. granulifera, type of this genus. The marine Actinotricha saltans, classified for a very long time in Oxytricha, seems to be a non-dorsomarginalian hypotrich according to molecular data, justifying the reactivation of the old genus Actinotricha. Oxytricha shii has a multiple dorsal kinety 3 fragmentation, three dorsomarginal rows, and the undulating membranes arranged in the Cyrtohymena pattern, strongly indicating that it is a member of the subgenus Cyrtohymena (Cyrtohymenides). This brief review is a further step to unravel the complicated systematics of the old, but still little-known genus Oxytricha. The following new combinations are made in this paper: Cyrtohymena (Cyrtohymenides) shii (Shi et al., 1997) comb. nov.; Heterooxytricha szaboi (Wilbert and Song, 2005) comb. nov.; Heterooxytricha geleii (Wilbert, 1986) comb. nov.; Urosomoida marcili (Paiva and Silva-Neto, 2004) comb. nov.; Urosomoida pseudofurcata (Berger, 1999) comb. nov.
Źródło:
Acta Protozoologica; 2011, 50, 4
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 143

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