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5742. Cultivar differences in photosynthetic tolerance to photooxidation and shading in rice (Oryza sativa L.)

Creator:
Jiao, Demao and Li, Xia
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
chlorophyll, grain, irradiance, net photosynthetic rate, photooxidation, photosynthetic characteristics, photosystems 1 and 2, ribulose-1,5-bisphosphate carboxylase, shoot dry mass, and superoxide dismutase
Language:
Multiple languages
Description:
Forty-four genotypes from the rice germplasm were identified under photoinhibition/photooxidation and shade conditions and divided into four basic types: (1) cultivars tolerant to both photooxidation and shading, (2) cultivars tolerant to photooxidation but sensitive to shading, (3) cultivars tolerant to shading but sensitive to photooxidation, and (4) cultivars sensitive to both photooxidation and shading. Photosynthetic characteristics of a cultivar tolerant (cv. Wuyugeng 3) and a cultivar sensitive (cv. Xiangxian) to photooxidation and shading were compared. The photochemical efficiency (Fv/Fm) of photosystem 2 (PS2) and the content of PS2-D1 protein in the tolerant cultivar Wuyugeng 3 decreased less under photooxidative conditions as compared with Xiangxian. Under similar conditions, superoxide dismutase was induced rapidly to a higher activity and the active oxygen (O-) built up to a lower level in Wuyugeng 3 than in Xiangxian. Net photosynthetic rate (PN) decreased by 23 % in Wuyugeng 3 vs. 64 % in Xiangxian. Shading (80 %) during the booting stage caused only small decreases (7-13 %) in ribulose-1,5-bisphosphate carboxylase activity and PN in Wuyugeng 3 but severe decreases (57-64 %) were observed in Xiangxian which corresponded to the decreases in grain yield of the two cultivars (38 and 73 %, respectively). We described a simple and effective screening method and physiological basis for breeding crops for enhanced tolerance to both high and low irradiance. and Demao Jiao, Xia Li.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5743. Cultivar variation in cotton photosynthetic performance under different temperature regimes

Creator:
Pettigrew, W. T.
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
chlorofyl, bavlna, teplota, chlorophyll, cotton, temperature, fluorescence chlorofylu, kultivary, abiotický stres, mezibuněčná koncentrace CO2, list, výměna plynu, termotolerance, efektivita využívání vody, chlorophyll fluorescence, cultivars, abiotic stress, intercellular CO2 concentration, leaf, gas exchange, maximum quantum yield, thermotolerance, water-use efficiency, 2, and 581
Language:
Multiple languages
Description:
Cotton (Gossypium hirsutum L.) yields are impacted by overall photosynthetic production. Factors that influence crop photosynthesis are the plants genetic makeup and the environmental conditions. This study investigated cultivar variation in photosynthesis in the field conditions under both ambient and higher temperature. Six diverse cotton cultivars were grown in the field at Stoneville, MS under both an ambient and a high temperature regime during the 2006-2008 growing seasons. Mid-season leaf net photosynthetic rates (PN) and dark-adapted chlorophyll fluorescence variable to maximal ratios (Fv/Fm) were determined on two leaves per plot. Temperature regimes did not have a significant effect on either PN or Fv/Fm. In 2006, however, there was a significant cultivar × temperature interaction for PN caused by PeeDee 3 having a lower PN under the high temperature regime. Other cultivars' PN were not affected by temperature. FM 800BR cultivar consistently had a higher PN across the years of the study. Despite demonstrating a higher leaf Fv/Fm, ST 5599BR exhibited a lower PN than the other cultivars. Although genetic variability was detected in photosynthesis and heat tolerance, the differences found were probably too small and inconsistent to be useful for a breeding program., W. T. Pettigrew., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5744. Cultural interpretations of Tamil Tigresses and Tamil women employed in non-traditional ways: two new phenomena in Tamil Sri Lankan society

Creator:
Hrdličková, Zuzana
Format:
bez média and svazek
Type:
model:article and TEXT
Language:
English
Description:
In this article I explore the long academic discourse between Peter Schalk and a number of feminist scholars regarding the way that the Sri Lankan Tamil rebel movement, the Liberation Tigers of Tamil Eelam, has constructed the image of female fighters within its ranks in order for them to be acceptable to conservative Tamil society in Sri Lanka. I contribute to the discussion by proposing a new argument based on my fieldwork. I reveal what happens if forces of social change (in this case international non-governmental organizations) do not make an effort to link their new initiatives to the traditional concepts and values of a given culture. In order to present a comprehensive line of thought, I explore the traditional Sri Lankan Tamil gender stereotype, and I consider the LTTE movement, its female cadres and the qualities attributed to them by the movement. In support of my argument, I present selected data collected during my two years of field research in Sri Lanka (conducted between 2005 and 2008). I recount the social upheaval that occurred in the East of the island as a consequence of the devastation caused both by the tsunami and the massive conflict between the LTTE and government forces, which in turn led to a significant increase in the number of international organizations employing local Tamil women.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

5746. Cultures of Knowledge a Komenský v síti učenecké korespondence

Creator:
Vladimír Urbánek
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, Komenský, Jan Amos, 1592-1670, programy a projekty, korespondence, databáze, programs and projects, correspondence, databases, 12, and 00
Language:
Czech
Description:
Correspondence was the “information superhighway” for s scholars and researchers during the early modern world. The Department of Comenius Studies of the Institute of Philosophy AS CR is one of the closest partners in a project based at the University of Oxford titled Cultures of Knowledge. Between 1550 and 1750, regular exchanges of letters encouraged the formation of virtual commu­nities of people worldwide with shared interests in various kinds of knowledge. Included were classical scholars, philologists, antiquaries, patristic scholars, orientalists, theologians, astronomers, botanists, experi­mental natural philosophers, emissaries’, ‘free-thinkers,’ and many other denizens of the “Republic of Letters.” Since 2009, the Cultures of Knowledge project at Oxford University has been using a variety of research methods to reassemble and understand these networks. Supporting this effort is the Andrew W. Mellon Foundation. As well as co-organizing the inaugural series of workshops in Prague, Cracow and Budapest, and the 2010 Universal Reformation conference in Oxford, both Institutes have also been active throughout the project in preparing the Comenius catalogue for Early Modern Letters Online (EMLO). and Vladimír Urbánek.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

5747. Cunninghamovy série

Creator:
Gil, José
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
body, philosophy of dance, gesture, plane of immanence, metalanguage, Merce Cunningham, and Giles Deleuze
Language:
Czech
Description:
An essay by the contemporary Portuguese philosopher José Gil addresses the prominent American choreographer and dancer Merce Cunningham’s conception of dance. Gil emphasizes that Cunningham approaches dance in a way that is fundamentally different from the traditional mimetic and expressive paradigm. With the help of Giles Deleuze’s observations, Gil proves that even in the case of dance shorn of the faculty to represent and express emotional contents, we can talk about units of dance, about their meaning and unity, and thus about the language of dance. Gil spells out this idea by showing a parallel between dance, in Cunningham’s conception of it, and modern painting. and Esej současného portugalského filosofa Josého Gila se zabývá pojetím tance u významného amerického choreografa a tanečníka Merce Cunninghama. Gil zdůrazňuje, že Cunningham pojímá tanec způsobem, který se zásadně odlišuje od tradičního mimetického a expresivního paradigmatu. Za pomoci úvah Gilese Deleuze Gil dokazuje, že i v případě tance zbaveného schopnosti reprezentovat a vyjadřovat emocionální obsahy můžeme hovořit o jednotkách tance, o jejich významu a jednotě, tedy o jazyku tance. Tuto myšlenku Gil upřesňuje pomocí paralely mezi tancem v Cunninghamově pojetí a moderním malířstvím.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5748. Current and/or relevant? Some reflections on autonomy of scientific opinion based on experience of Serbian ethnology/anthropology at the beginning of third millennium

Creator:
Pavićević, Aleksandra
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
autonomy of science, scientific policy, quantity, ethnology/anthropology, actuality, and relevance
Language:
Czech
Description:
Autonomy of science and art is an ideal of every civilized society. The distance between a certain society and this ideal depends on a large number of parameters, among which cultural enlightenment and consciousness of the main protagonists in realization of these two areas seem to be most important. Unfortunately, Serbia cannot boast with a high level of independency of creative processes. Nowadays, in formal sense, they enjoy a higher level of autonomy in terms of the state ideology; however, at the same time, they are essentially and basically restricted by it. The very notion of autonomy here is related to financial and, more than this, to ideological independence of free and creative thought, that is to the question to which extent scientific creativity manage to transcend current cultural-historical-social context and to find universal regularities of human civilization in it. Intensity of social changes and postmodern market ideologies are reflected both at official scientific policy and at internal determination of context and concept of ethnological/anthropological researching which quite often become trapped in the shallow of topicality.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

5749. Current induced seismicity in the Paskov Mine field (Ostrava region)

Creator:
Holub, Karel, Rušajová, Jana, and Josef Holečko
Format:
print, bez média, and svazek
Type:
article, články, model:article, and TEXT
Subject:
Geologie. Meteorologie. Klimatologie, doly, seizmicita, mines, seismicity, ostravsko-karvinská pánev (Česko), Ostrava-Karviná coal basin (Czechia), Ostrava-Karviná coal mines, seismic network, induced seismicity, location plot, 7, and 551
Language:
English
Description:
The aim of this paper is to present the results of an investigation of induced seismic events which occurred during mining in the coalfields of Plants Paskov and Staříč of the Paskov Mine which belong to the southern part of the Ostrava-Karviná coal mines. Some results obtained in the time period January 1992 - December 2002 have already been published, and therefore, are mentioned here only briefly. The paper is based on new results of seismological observations at the OKC, KLOK, STEB seismic stations operated by the Institute of Geonics AS CR and stations of the Green Gas DPB, a.s., Paskov. A total of 26 seismic events were monitored from January 2008 to February 2012, most of them were localized into the area under study. As for the energy span of individual events according to the energetic classification of the Geophysical Centre of the Green Gas DPB, a.s., Paskov, all seismic events in Table 1 were estimated within the limits E(J) <5.0 ×102 ÷ 2.0 × 104>., Karel Holub, Jana Rušajová and Josef Holečko., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

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