National Repository of Grey Literature 7 records found  Search took 0.00 seconds. 
Hormonal regulation of plant cell division and elongation
Petrášek, Jan ; Zažímalová, Eva (advisor) ; Griga, Miroslav (referee) ; Procházka, Stanislav (referee)
a I I T T T I I a I I a T I T I t r T T I Jml PnrnÁŠnx Suvnalnv SuuuuARyoF DtssERTATtoNTHEsts This thesisis focusedon thehormonalregulationof plantcelldivisionand growth.Both these processes are crucial in shaping sessile plant body. The manifestationof directionalityin ce||p|ateformationduringcýokinesisas we||as in celle|ongationcou|d be found in a form of various shapes of cells, organs and whole plants.Equal and inequal cell division,cell elongationand isodiametriccell growth- they all allow establishing,formingand maintainingcharacterof tissues,organsand whole bodies duringplantdevelopment. Scientificresearchhas alwaysbeenfocusedon regulatorycompounds,the actionof which induces detectable and observable responses. By uncovering the exact mechanisms of their mode of action, many intermediatemessengers were found. However,classicalconceptof "majorregulators'surviveduntilthesedays.lndeed,plant hormones, small organic molecules with wide range of effects, are typical representativesof such compounds,which are studiedalready around one hundred years.They are synthesisedand utilisedin varioustissuesthroughoutthe wholeplant and theycouldbe transportedin vasculatureto longdistances. Auxins and cýokinins - regu|atorsof plant development The researchof recentyears contributedremarkablyto the understandingof...
The effect of autoregulated ipt gene expression, exogenous cytokinins and nitrate on cytokinin metabolism and leaf senescence
Sýkorová, Blanka ; Kamínek, Miroslav (advisor) ; Griga, Miroslav (referee) ; Procházka, Stanislav (referee)
coNcLUsroNs l. ttre iptexpressionundeÍthesenescence-specificSÁGí2 promoterresultedin de|ayof |eaÍ senescence,increaseof contentof bioactivecytokininsand nitratereductaseactivityin leavesas wellas to enhancementof nitrateinfluxin plantsgrownunderlimitedN supply. However,the SAG12::iptplantsdid not differfromWT plantsin grainyield components includingthe numberof grainsand grainweight.Resultssuggestthatdelayof leafsenesce of wheat plantsalso delays translocationof nutrientsand metabolitesfrom leaves to developinggrainsafteranthesisand in this way interfereswiththe reproductivestrategy wheatas strictlymonocarpicplantwhichis basedon a programmedfast translocationof metabolitesand nutrientsfrom senescingleavesto the reproductivesinks shortlyafter anthesis. ll. Respondingto the mostlyvaguestatementsthatthe physiologicaleffectsof cytokininsare dependenton plantgenotypeandaffectedbyvariousinternalfactorswe testedtheefficiency of andaromatic(3OHBAR)andan isoprenoid (t-ZR)cytokininon retentionof chlorophyllin detachedoat and wheatleafapices.The efficiencyof thetwocytokininsin preservationof chlorophyllwas differentin the oat and wheatdependingon local or whole adaxialleaf surfacecytokininapplication.The oat and wheatleafpiecesdifferedin the ratesof uptake and the dynamicsof ["H]t-ZRand [JH]3OHBARtranslocationwhichwas...
Mechanizmus transportu cytokininů přes buněčnou membránu a jejich metabolizmus v buňkách tabákové suspenzní kultury BY-2
Klíma, Petr ; Zažímalová, Eva (advisor) ; Galuszka, Petr (referee) ; Procházka, Stanislav (referee)
MECHANISM OF CYTOKININ TRANSPORT ACROSS PLASMA MEMBRANE AND THEIR METABOLISM IN TOBACCO BY-2 CULTURED CELLS Mgr. Petr Klíma / Abstract of Ph.D. Thesis / Prague 2011 Cytokinins (CKs) are plant hormones that play a major role in a number of developmental processes in plants. Those include promotion of cell division, active growth and differentiation, and maintenance of sink-source relationships, as well as control of environmental stress responses. Native CKs are low-molecular derivatives of adenine which seem to act either as paracrine or as long-distance signals. Due to their numerous physiological effects, plants have to precisely control the occurrence of bioactive CK molecules on the levels of the whole plant, its organs, tissues as well as single cells. To achieve this, a concerted action of metabolism and transport processes is required. Studies of the kinetics of CK translocation across plasma membrane in BY-2 suspension-grown tobacco cells suggested the existence of energy-dependent, partially selective transport routes for CK bases and CK ribosides. HPLC analysis of the metabolites of accumulated CKs pointed at their fast degradation or metabolic conversion into physiologically inactive forms. The prevalent ways of inactivation were the degradation to adenine and phosphorylation or phosphoribosyl...
Internet application to show data from the wireless temperature measuring system
Procházka, Stanislav ; Stehlík, Jiří (referee) ; Kuchta, Radek (advisor)
Within this bachelor work the design of the Internet applications was created. It can be used for administration, archiving as well as presentation of data acquired from the coordinator of the temperature sensor network. The system is based on temperature measurement and it consists of the temperature sensor network, coordinator of sensor network and the Internet applications. The coordinator of sensor network collects data from wireless sensors and delivers them to the computer unit. Subsequently the Internet applications evaluate these data.
Data Collecting Application in Wireless Sensor Network for Measuring Relative Humidity of Air
Procházka, Stanislav ; Macháň, Ladislav (referee) ; Jaroš, David (advisor)
The master work is focused on the design and implementation of two parts of the system for measuring temperature and relative humidity. The system for measuring temperature and relative humidity consists of a network of wireless sensors, a ISM/Wifi converter and application which will collect, analyze and archive data. The design and implementation of ISM/Wifi converter as well as the design and implementation of application are described in this work. ISM/Wifi converter will be able to communicate with the network of wireless sensors through ISM/Wifi protocol and end device (the device with Android operating system) by means of IEEE 802.11 protocol. The application will be able to evaluate, to save and to present user the received data very clearly.
Zpracování vědeckého expertního řešení‚ jehož obsahem bude kvantifikace hodnot funkcí lesů a funkční újmy‚ ke které došlo na lesních ekosystémech Tatranského národního parku v SR v důsledku velkoplošné větrné kalamity v listopadu 2004
Mendelova zemědělská a lesnická univerzita v Brně, Lesnická a dřevařská fakulta, Ústav tvorby a ochrany krajiny, Brno ; Smítka, David ; Schneider, Jiří ; Melicharová, Alice ; Kupec, Petr ; Hrůza, Petr ; Fialová, Jitka ; Vyskot, Ilja ; Procházka, Stanislav
Jde o formu pomoci České republiky k odstranění následků živelní pohromy, která postihla lesní oblasti TANAPu. Ústav tvorby a ochrany krajiny Lesnické a dřevařské fakulty Mendelovy zemědělské a lesnické univerzity v Brně vypracoval metodu kvantifikace a kvantitativního hodnocení funkcí lesů (Vyskot, I. a kol., 1996 - 2003), s aplikací na hodnocení škod na životním prostředí způsobené újmou na celospolečenských funkcích lesa. Předkládaná zpráva vyhodnocuje škody na životním prostředí vyjádřené újmou celospolečenských funkcích lesů, aplikací výše uvedené metody modifikované na lesní poměry Slovenské republiky. Dílo je vypracováno na základě dohody ministerstev životního prostředí České a Slovenské republiky kolektivem pracovníků Ústavu tvorby a ochrany krajiny Lesnické a dřevařské fakulty Mendelovy zemědělské a lesnické univerzity v Brně.

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