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    Wyświetlanie 1-11 z 11
    Tytuł:
    Stromuling when stressed!
    Autorzy:
    Krenz, B.
    Guo, T.W.
    Kleinow, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/58707.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    stromule
    geminivirus
    plant virus
    chloroplast
    plastid
    plant cell
    Opis:
    Stromules are stroma-filled tubules, extruding from the plastid and surrounded by both envelope membranes, but so far, stromules remain enigmatic structures and their function unknown. Stromules can interconnect plastids and have been found to associate with the nucleus, endoplasmic reticulum, Golgi complex, plasma membrane, mitochondria and peroxisomes. This minireview briefly summarizes markers to visualize stromules, inducers of stromules and provides new data about plant virus induced stromules.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simple method to estimate cell wall extensibility coefficient by using only two cardinal numbers
    Autorzy:
    Pietruszka, M
    Powiązania:
    https://bibliotekanauki.pl/articles/58740.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    cell wall
    plant cell
    growing plant
    temperature
    extensibility coefficient
    Opis:
    In this short communication we consider the extensibility properties of the cell wall. This is accomplished by a heuristically motivated equation for the expanding volume of the cell. The experimentally determined characteristic time t0 and temperature T0 are the only numbers required for evaluating the effective yielding coefficient Ф(t, T) in the respective time and temperature domains.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2009, 78, 4; 269-270
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lipid peroxidation in plant cells, its physiological role and changes under heavy metal stress
    Autorzy:
    Skorzynska-Polit, E
    Powiązania:
    https://bibliotekanauki.pl/articles/57427.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    plant physiology
    lipoxygenase
    plant cell
    plant stress
    lipid peroxidation
    heavy metal
    Opis:
    Lipid peroxidation, which is a natural and essential process, can occur in a non-enzymatic and/or enzymatic way in plant cells. Some of its products have cytotoxic effects on cells, but others function as plant effectors. The lipid peroxidation in plants exposed to heavy metal stress depends on the metal, plant organ, plant species and its genotype.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mathematical model for tissue stresses in growing plant cells and organs
    Autorzy:
    Lewicka, S
    Pietruszka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/57317.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    growing plant
    plant cell
    mathematical model
    tissue stress
    equilibrium equation
    plant organ
    Opis:
    In this study we propose a simple mathematical model based on the equilibrium equation for the materials deformed elastically. Owing to the turgor pressure of the cells, the peripheral walls of the outer tissue are under tension, while the extensible inner tissue is under compression. This well known properties of growing multicellular plant organs can be derived from the equation for equilibrium. The analytic solutions may serve as a good starting point for modeling the growth of a single plant cell or an organ.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2009, 78, 1; 19-23
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamics of irreversible plant cell growth
    Autorzy:
    Pietruszka, M
    Lewicka, S.
    Pazurkiewicz-Kocot, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/58662.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    thermodynamics
    irreversible process
    plant cell
    plant growth
    cell wall
    yielding
    growth stimulator
    growth inhibitor
    modified growth equation
    Opis:
    The time-irreversible cell enlargement of plant cells at a constant temperature results from two independent physical processes, e.g. water absorption and cell wall yielding. In such a model cell growth starts with reduction in wall stress because of irreversible extension of the wall. The water absorption and physical expansion are spontaneous consequences of this initial modification of the cell wall (the juvenile cell vacuolate, takes up water and expands). In this model the irreversible aspect of growth arises from the extension of the cell wall. Such theory expressed quantitatively by time-dependent growth equation was elaborated by Lockhart in the 60's.The growth equation omit however a very important factor, namely the environmental temperature at which the plant cells grow. In this paper we put forward a simple phenomenological model which introduces into the growth equation the notion of temperature. Moreover, we introduce into the modified growth equation the possible influence of external growth stimulator or inhibitor (phytohormones or abiotic factors). In the presence of such external perturbations two possible theoretical solutions have been found: the linear reaction to the application of growth hormones/abiotic factors and the non-linear one. Both solutions reflect and predict two different experimental conditions, respectively (growth at constant or increasing concentration of stimulator/inhibitor). The non-linear solution reflects a common situation interesting from an environmental pollution point of view e.g. the influence of increasing (with time) concentration of toxins on plant growth. Having obtained temperature modified growth equations we can draw further qualitative and, especially, quantitative conclusions about the mechanical properties of the cell wall itself. This also concerns a new and interesting result obtained in our model: We have calculated the magnitude of the cell wall yielding coefficient (T) [m3 J-1•s-1] in function of temperature which has acquired reasonable numerical value throughout.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2006, 75, 3; 183-190
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Various scenarios of the cell pattern formation in Arabidopsis lateral root
    Autorzy:
    Bialek, J.
    Potocka, I.
    Szymanowska-Pulka, J.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/58191.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    cell formation
    lateral root
    formation
    Arabidopsis
    cell division
    plant organ
    plant morphology
    Opis:
    During lateral root (LR) development a coordinate sequence of cell divisions, accompanied by a change of the organ form takes place. Both the order of anatomical events and morphological features may vary for individual primordia. At early stages of LR primordia development oblique division walls are inserted in cells that are symmetrically located on both sides of the axis of the developing LR primordium, and thereby allow for the protrusion of the LR. We hypothesize that both oblique cell wall insertion and continuous changes in primordium form could be a consequence of a local change in stress distribution in the region of the LR initiation.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of the pollen in the Antarctic flowering plant Colobanthus quitensis [Kunth] Bartl.
    Rozwoj pylku u antarktycznej rosliny naczyniowej Colobanthus quitensis [Kurth] Bartl.
    Autorzy:
    Gielwanowska, I
    Bochenek, A.
    Szczuka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/26765.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    plant physiology
    pollen development
    microsporogenesis
    male gametophyte
    vascular plant
    tapetal cell
    flowering plant
    Colobanthus quitensis
    Antarctic plant
    Opis:
    Colobanthus quitensis (Kunth) Bartl, produced two types very small bisexual flowers. In the Antarctic natural conditions chasmogamic and cleistogamic flowers most often form five stamina with short filaments. Two microsporangia with a three-layer wall form in the anther. Microspore mother cells, which develop into microspores after meiosis, form inside the microsporangium. Microsporocytes of Colobanthus quitensis are surrounded with a thick callose layer, the special wall. After meiosis, the callose wall is dissolved and microspores are released from the tetrad. The production of proorbicules, orbicules and peritapetal membrane, and the construction of a complex sporoderm with numerous apertural sites were observed. When microspore and pollen protoplasts underwent necrosis, probably as a result of temperature and osmotic stress, sporoderm layers formed around microspores, and the cell tapetum did not disintegrate. However, woody wall layers did not accumulate in endothecium cells.
    Colobanthus quitensis, jedyna dwuliścienna roślina kwiatowa rosnąca w ekstremalnie niesprzyjających warunkach antarktycznej strefy geobotanicznej, wykształca zróżnicowane, obupłciowe kwiaty; chasmogamiczne i kleistogamiczne. Kleistogamia jest tu indukowana niską temperaturą dużą wilgotnością powietrza i silnym wiatrem. W mikrosporangiach Colobanthus quitensis różnicowała się mała liczba mikrospor, co jest cechą typową dla gatunków z kleistogamią. Mikrosporocyty tworzyły bardzo grube kalozowe ściany specjalne. Nie było jednak kalozy w ścianie oddzielającej komórkę generatywną od wegetatywnej. W rozwoju pyłku Colobanthus quitensis zaobserwowano męską jednostkę rozrodczą ze zróżnicowanymi komórkami plemnikowymi. Mniejsza komórka zawierała przede wszystkim mitochondria, a większa głównie piastydy. Dojrzały pyłek wysypywał się z mikrosporangium lub kiełkował na miejscu. Obserwowano trójkomórkowe ziarna pyłku z łagiewkami wewnątrz otwartych pylników.
    Źródło:
    Acta Agrobotanica; 2007, 60, 2
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of cell membrane injury in caraway [Carum carvi L.] genotypes in water deficit conditions
    Autorzy:
    Seidler-Lozykowska, K
    Bandurska, H.
    Bocianowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/58454.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    cell membrane
    caraway
    Carum carvi
    genotype
    water deficit condition
    polyethylene glycol
    medicinal plant
    Opis:
    The aim of the study was to evaluate the resistance of caraway genotypes to water deficit based on the estimation of cell membrane stability (CMS) in leaves using polyethylene glycol (PEG) test. In 2007 and 2008, 25 selected caraway genotypes, originating from European botanical gardens (18), cultivars (2) and our own breeding strains (5), were tested. The plant material was collected from the experimental field. The obtained results showed highly significant differences in cell membrane injuries (p = 0.001) among investigated genotypes. The rank of genotypes in membrane injury index in 2007 was similar to that of 2008. Caraway genotypes originating from Warsaw (49.4%), Cracow (45.3%), Reykiavik (39.9%), Berlin (23.8%), Wisley (22.7%) and strains 9/2 (23.7%), 60/8 (22.2%) exhibited a high level of injury, which showed weak CMS and their high sensitivity to drought. The lowest extent of membrane injury was observed in genotypes originating from Bayreuth (4.2%), Ulm (4.4%), Cluj (5.5%), Lousanne (6.8%) and cultivar "Kończewicki" VI/4 (6.2%), which proves low sensitivity of these genotypes to water deficit and cell membrane stability. These genotypes may be used in further breeding program to improve caraway resistance to drought.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2010, 79, 2; 95-99
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of the cell wall components during terrestrialization
    Autorzy:
    Banasiak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/57898.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    evolution
    cell wall
    land plant
    terrestrialization
    ancestral gene
    polysaccharide
    lignin
    terrestrial ecosystem
    Opis:
    Colonization of terrestrial ecosystems by the first land plants, and their subsequent expansion and diversification, were crucial for the life on the Earth. However, our understanding of these processes is still relatively poor. Recent intensification of studies on various plant organisms have identified the plant cell walls are those structures, which played a key role in adaptive processes during the evolution of land plants. Cell wall as a structure protecting protoplasts and showing a high structural plasticity was one of the primary subjects to changes, giving plants the new properties and capabilities, which undoubtedly contributed to the evolutionary success of land plants. In this paper, the current state of knowledge about some main components of the cell walls (cellulose, hemicelluloses, pectins and lignins) and their evolutionary alterations, as preadaptive features for the land colonization and the plant taxa diversification, is summarized. Some aspects related to the biosynthesis and modification of the cell wall components, with particular emphasis on the mechanism of transglycosylation, are also discussed. In addition, new surprising discoveries related to the composition of various cell walls, which change how we perceive their evolution, are presented, such as the presence of lignin in red algae or MLG (1→3),(1→4)-β-D-glucan in horsetails. Currently, several new and promising projects, regarding the cell wall, have started, deciphering its structure, composition and metabolism in the evolutionary context. That additional information will allow us to better understand the processes leading to the terrestrialization and the evolution of extant land plants.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The number of cell types, information content, and the evolution of complex multicellularity
    Autorzy:
    Niklas, K.J.
    Cobb, E.D.
    Dunker, A.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/58064.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    cell type
    information content
    evolution
    multicellularity
    alga
    embryophyte
    genome size
    land plant
    Opis:
    The number of different cell types (NCT) characterizing an organism is often used to quantify organismic complexity. This method results in the tautology that more complex organisms have a larger number of different kinds of cells, and that organisms with more different kinds of cells are more complex. This circular reasoning can be avoided (and simultaneously tested) when NCT is plotted against different measures of organismic information content (e.g., genome or proteome size). This approach is illustrated by plotting the NCT of representative diatoms, green and brown algae, land plants, invertebrates, and vertebrates against data for genome size (number of base-pairs), proteome size (number of amino acids), and proteome functional versatility (number of intrinsically disordered protein domains or residues). Statistical analyses of these data indicate that increases in NCT fail to keep pace with increases in genome size, but exceed a one-to-one scaling relationship with increasing proteome size and with increasing numbers of intrinsically disordered protein residues. We interpret these trends to indicate that comparatively small increases in proteome (and not genome size) are associated with disproportionate increases in NCT, and that proteins with intrinsically disordered domains enhance cell type diversity and thus contribute to the evolution of complex multicellularity.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ultrastructural changes in chloroplasts of mesophyll cells of chlorotic and prematurely yellowed leaves of Betula pendula Rothr.
    Autorzy:
    Przybyl, K
    Idzikowska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/58928.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    plant disease
    premature yellowing
    silver birch
    Betula pendula
    ultrastructural change
    chloroplast
    mesophyll cell
    chlorosis
    leaf
    Opis:
    The ultrastructure of chloroplasts was studied in mesophyll cells of the leaves of silver birch (Betula pendula) showing interveinal chlorosis or premature yellowing, in comparison with leaves without symptoms or exhibiting symptoms of natural senescence. The leaves were collected between May 26 to June 7 and additionally in the September 10-12 from the upper part of the crown, from increments of the past four years. No major difference in ultrastructure of chloroplasts was found between spongy and palisade mesophyll cells. The following senescencerelated changes were observed in chloroplasts of prematurely yellowed leaves and showing inteveinal chlorosis: reduced chloroplast size, degeneration of the membrane systems of thylakoids and increased electron density of plastoglobuli. The most electron dark globules (lipid droplets) were found together with starch grains in cells of spongy mesophyll of leaves showing interveinal chlorosis. Abnormal, spherical and rounded chloroplasts with electron-dark inside of thylakoids or the electron-dark stroma between thylakoids were found only in yellowed and chlorotic leaves in spring.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2003, 72, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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