Relevant bibliographies by topics / Plant vascular tissues

Academic literature on the topic 'Plant vascular tissues'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Plant vascular tissues"

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Hellmann, Eva, Donghwi Ko, Raili Ruonala, and Ykä Helariutta. "Plant Vascular Tissues—Connecting Tissue Comes in All Shapes." Plants 7, no. 4 (December 13, 2018): 109. http://dx.doi.org/10.3390/plants7040109.

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For centuries, humans have grown and used structures based on vascular tissues in plants. One could imagine that life would have developed differently without wood as a resource for building material, paper, heating energy, or fuel and without edible tubers as a food source. In this review, we will summarise the status of research on Arabidopsis thaliana vascular development and subsequently focus on how this knowledge has been applied and expanded in research on the wood of trees and storage organs of crop plants. We will conclude with an outlook on interesting open questions and exciting new research opportunities in this growing and important field.
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Hewer, A., T. Will, and A. J. E. van Bel. "Plant cues for aphid navigation in vascular tissues." Journal of Experimental Biology 213, no. 23 (November 12, 2010): 4030–42. http://dx.doi.org/10.1242/jeb.046326.

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Issa, Peter P., Michael Garvey, Scott Grimmell, Pramod Pantha, Maheshi Dassanayake, and Bret D. Elderd. "Hitching a Ride: Examining the Ability of a Specialist Baculovirus to Translocate through Its Insect Host’s Food Plant." Pathogens 10, no. 11 (November 18, 2021): 1500. http://dx.doi.org/10.3390/pathogens10111500.

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Plant vascular systems can translocate the entomopathogen Bacillus thuringiensis from the soil into plant tissues. However, whether other soil dwelling entomopathogens utilize plant vascular tissue for movement has not yet been fully explored. We used Spodoptera frugiperda multiple nucleopolyhedrovirus (SfMNPV) to evaluate whether baculoviruses, a common entomopathogen and bioinsecticide, can be transported through the plant vascular pathways of Zea mays. We found that our treatments did not allow a sufficient virus translocation into the plant to induce a lethal infection in insects, which was confirmed by a molecular analysis. While other entomopathogens translocate, baculoviruses may not be one of them.
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Qaderi, Mirwais, Ashley Martel, and Sage Dixon. "Environmental Factors Influence Plant Vascular System and Water Regulation." Plants 8, no. 3 (March 15, 2019): 65. http://dx.doi.org/10.3390/plants8030065.

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Developmental initiation of plant vascular tissue, including xylem and phloem, from the vascular cambium depends on environmental factors, such as temperature and precipitation. Proper formation of vascular tissue is critical for the transpiration stream, along with photosynthesis as a whole. While effects of individual environmental factors on the transpiration stream are well studied, interactive effects of multiple stress factors are underrepresented. As expected, climate change will result in plants experiencing multiple co-occurring environmental stress factors, which require further studies. Also, the effects of the main climate change components (carbon dioxide, temperature, and drought) on vascular cambium are not well understood. This review aims at synthesizing current knowledge regarding the effects of the main climate change components on the initiation and differentiation of vascular cambium, the transpiration stream, and photosynthesis. We predict that combined environmental factors will result in increased diameter and density of xylem vessels or tracheids in the absence of water stress. However, drought may decrease the density of xylem vessels or tracheids. All interactive combinations are expected to increase vascular cell wall thickness, and therefore increase carbon allocation to these tissues. A comprehensive study of the effects of multiple environmental factors on plant vascular tissue and water regulation should help us understand plant responses to climate change.
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Caño-Delgado, Ana, Ji-Young Lee, and Taku Demura. "Regulatory Mechanisms for Specification and Patterning of Plant Vascular Tissues." Annual Review of Cell and Developmental Biology 26, no. 1 (November 10, 2010): 605–37. http://dx.doi.org/10.1146/annurev-cellbio-100109-104107.

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Kudirka, Dalia T., and Peter L. Webster. "Temporal differences in cellular activity between tissues of the petal of Tradescantia clone 4430." Canadian Journal of Botany 68, no. 5 (May 1, 1990): 1075–79. http://dx.doi.org/10.1139/b90-134.

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Cellular behavior was analysed in different tissues of petals of Tradescantia clone 4430 during lamina development. Previous work demonstrated that a period of relatively high mitotic activity is followed by a brief period of arrest in the G1 stage of the cell cycle before a shift of cells from G1 and G2 in the mature petal. In this study, the same sequence of events was seen to occur in both provascular–vascular tissue and epidermis and mesophyll. However, analysis of mitotic frequencies, shown to reflect mitotic rates in whole petals, indicated that mitotic activity peaks later and (or) lasts longer in the provascular–vascular tissue than in the epidermis and mesophyll. Similarly, there is a corresponding delay in the subsequent shift of the cells of the provascular–vascular tissue from G1, to G2, with the result that at anthesis only about 40% of the cells of the provascular tissue have reached G2 DNA values compared with 100% of the rest of the cells of the petal.
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Schuetz, Mathias, Afsaneh Haghighi-Kia, Carol L. Wenzel, and Jim Mattsson. "Induction of xylem and fiber differentiation in Populus tremuloidesThis article is one of a selection of papers published in the Special Issue on Poplar Research in Canada." Canadian Journal of Botany 85, no. 12 (December 2007): 1147–57. http://dx.doi.org/10.1139/b07-112.

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Vascular tissues are of particular importance to terrestrial plants as they allow long-distance transport within the plant and also provide support for upright growth. Nowhere are these traits more obvious than in tree species. Here we have evaluated the role of auxin transport in the differentiation of primary and secondary vascular tissues in a tree species, trembling aspen ( Populus tremuloides Michx). We found that a partial inhibition of auxin transport resulted in increased width and numbers of veins in leaves. A similar vascular overgrowth was observed during early secondary vascular differentiation of stems. This stem overgrowth consisted almost entirely of early differentiation of metaxylem and fibers. We hypothesize that the early differentiation of metaxylem and fibers results from inhibitor-induced accumulation of auxin in stems and that the differentiation of these tissues requires higher levels of auxin exposure than protoxylem. The controlled conditions used in this study also provide a framework for reverse genetics approaches to identify genes involved in vascular differentiation based on elevated expression in tissues developing vascular overgrowth.
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Freshour, G., M. Hahn, and Z.-H. Ye. "Microscopic Examination Of Vascular Differentiation And Pattern Formation In The Inflorescence Stems Of Arabidopsis." Microscopy and Microanalysis 5, S2 (August 1999): 1284–85. http://dx.doi.org/10.1017/s1431927600019747.

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Plant vascular system is the principal means to carry water and food throughout the plant body. It is composed of two types of conducting vascular tissues, xylem and phloem. Xylem carries water and minerals from the root to the shoot, whereas phloem transports photosynthates from leaves to other parts of the body. The evolution of vascular system which solved the problem of water and food transport was considered to be one of the key events for the successful emergence of vascular plants on the land from aquatic environments. Although vascular tissues in almost all vascular plants consist of xylem and phloem, diverse arrangements of vascular tissues within the bundles and of vascular bundles in the stele were evolved (1). The occurrence of diverse vascular patterns in vascular plants offers an excellent opportunity to study the evolutionary mechanisms controlling pattern formation. In this report, we present our studies on the vascular differentiation and pattern formation in the inflorescence stems of Arabidopsis thaliana.
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Mattsson, J., Z. R. Sung, and T. Berleth. "Responses of plant vascular systems to auxin transport inhibition." Development 126, no. 13 (July 1, 1999): 2979–91. http://dx.doi.org/10.1242/dev.126.13.2979.

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To assess the role of auxin flows in plant vascular patterning, the development of vascular systems under conditions of inhibited auxin transport was analyzed. In Arabidopsis, nearly identical responses evoked by three auxin transport inhibitor substances revealed an enormous plasticity of the vascular pattern and suggest an involvement of auxin flows in determining the sites of vascular differentiation and in promoting vascular tissue continuity. Organs formed under conditions of reduced auxin transport contained increased numbers of vascular strands and cells within those strands were improperly aligned. In leaves, vascular tissues became progressively confined towards the leaf margin as the concentration of auxin transport inhibitor was increased, suggesting that the leaf vascular system depends on inductive signals from the margin of the leaf. Staged application of auxin transport inhibitor demonstrated that primary, secondary and tertiary veins became unresponsive to further modulations of auxin transport at successive stages of early leaf development. Correlation of these stages to anatomical features in early leaf primordia indicated that the pattern of primary and secondary strands becomes fixed at the onset of lamina expansion. Similar alterations in the leaf vascular responses of alyssum, snapdragon and tobacco plants suggest common functions of auxin flows in vascular patterning in dicots, while two types of vascular pattern alterations in Arabidopsis auxin transport mutants suggest that at least two distinct primary defects can result in impaired auxin flow. We discuss these observations with regard to the relative contributions of auxin transport, auxin sensitivity and the cellular organisation of the developing organ on the vascular pattern.
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Opsahl, Stephen, and Ronald Benner. "Characterization of carbohydrates during early diagenesis of five vascular plant tissues." Organic Geochemistry 30, no. 1 (January 1999): 83–94. http://dx.doi.org/10.1016/s0146-6380(98)00195-8.

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Dissertations / Theses on the topic "Plant vascular tissues"

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Smith, Marthinus Luther. "Investigating the role of pyrophosphate fructose 6-phosphate 1-phosphotransferase in phloem loading." Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/1969.

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Moussawi, Jihad. "PtaRHE1, a poplar RING-H2 protein of ATL family, with a regulatory role in vascular tissues development." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209344.

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Les protéines possédant un domaine RING (REALLY INTERESTING NEW GENE) avec une activité E3 ligase sont largement présentes chez les plantes, jouent des rôles importants dans la régulation de plusieurs processus par la reconnaissance d’une protéine cible pour l’ubiquitination. Auparavant, il a été montré que l'expression de PtaRHE1, codant une protéine contenant un domaine RING-H2 avec une activité E3 ligase, est associée à la mise en place de la croissance secondaire chez le peuplier. Dans le cadre de cette thèse, nous avons démontré que PtaRHE1 est mono-ubiquitiné in vitro en présence de l’E2 du peuplier PtaUbC5a. Par hydridation in situ et Western blot, nous montrons que PtaRHRE1 et la protéine correspondante sont exprimés dans les tissus vasculaires de la tige, c'est-à-dire le phloème, le cambium et le xylème. Par comparaison avec les plantes de type sauvage, la sous-expression de PtaRHE1 suite à l’expression d’un microARN (i) a donné lieu à une modification dans la morphologie des fibres secondaire de phloème avec une plus forte densité cellulaire et des paroi de fibres plus mince, (ii) à une modification de la qualité de lignine avec moins d’unité S au niveau des tissus de l’écorce, ces résultats suggèrent un rôle de PtaRHE1 dans la formation et / ou la maturation des fibres. La sur-expression de PtaRHE1 chez les peupliers engendre un phénotype pléiotropique caractérisé par l’enroulement des feuilles et une inhibition du développement racinaire. L’expression du gène codant pour le facteur de transcription WRKY23 est positivement corrélée à celui de PtaRHE1 dans le xylème de la tige des lignées sur-exprimant ou sous-exprimant PtaRHE1. Sur base d’un modèle, nous suggérons un rôle pour le couple PtaRHE1/PtaWRKY23 dans le développement des tissus vasculaires. De plus, nous avons montré que l'expression de PtaRHE1 et l'accumulation de la protéine correspondante sont modulées par l'humidité de l’air et du sol ainsi que par l'acide abscissique. Les informations présentées dans ce travail indiquent un rôle de PtaRHE1 au cours de développement de la plante ainsi que pendant la réponse au stress biotique et abiotique
Doctorat en Sciences agronomiques et ingénierie biologique
info:eu-repo/semantics/nonPublished
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Holmlund, Mattias. "The role of the BLADE-ON-PETIOLE genes in the regulation of plant growth and development /." Umeå : Dept. of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 2008. http://epsilon.slu.se/200869.pdf.

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Mensi, Imène. "Localisation in planta de Xanthomonas albilineans et identification de déterminants moléculaires impliqués dans la colonisation épiphyte de sa plante hôte, la canne à sucre." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20157.

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Xanthomonas albilineans est l'agent causal de l'échaudure des feuilles, une des principales maladies bactériennes de la canne à sucre dont l'impact peut être très important lorsque des variétés sensibles sont infectées au champ. Les mécanismes qui régissent les interactions entre cet agent pathogène et la canne à sucre sont encore très peu connus. Les objectifs de ce travail étaient (i) d'identifier des déterminants moléculaires impliqués dans la survie épiphyte de X. albilineans et (ii) de préciser la localisation de la bactérie dans les tissus de la canne à sucre. Parmi les facteurs étudiés, les polysaccharides de surface et une protéine de la membrane externe (XaOmpA1) de X. albilineans s'avèrent indispensables pour la survie épiphyte de cet agent pathogène. En revanche, la molécule signal diffusible DSF et les métabolites secondaires codés par les gènes NRPS (« Non Ribosomal Peptide Synthetases ») ne sont pas requis pour l'installation de la bactérie en surface des feuilles, au moins en l'absence d'autres microorganismes compétiteurs. Toutefois, la colonisation optimale de la phyllosphère de la canne à sucre nécessite la présence d'un système DSF/RpfGC intact. Dans la deuxième partie de ce travail, nous avons vérifié la localisation in planta de X. albilineans par microscopie confocale, immunocytochimie, et microscopie électronique à transmission. Les observations microscopiques réalisées ont permis de montrer que X. albilineans n'est pas limitée au xylème de la canne à sucre, comme on le considérait jusqu'à présent. Bien au contraire, cette bactérie est capable de quitter le système vasculaire de sa plante hôte et de pénétrer dans d'autres types cellulaires, notamment les cellules du parenchyme non vasculaire. Il s'agit là, à notre connaissance, d'un nouveau mécanisme de colonisation d'une plante par une bactérie phytopathogène qui reste à décrypter
Xanthomonas albilineans is the causal agent of leaf scald, a lethal disease of sugarcane that can significantly impact infected susceptible varieties in the field. The mechanisms that govern the interactions between this bacterial pathogen and its host plant are not well known. The objectives of this study were (i) to identify molecular factors involved in epiphytic survival of X. albilineans and (ii) to verify the localization of X. albilineans in sugarcane tissues. Among the studied factors, surface polysaccharides and an outer-membrane protein (XaOmpA1) of X. albilineans were crucial for epiphytic survival of this pathogen. Secondary metabolites synthesized by non-ribosomal peptide synthetases and the diffusible signal factor DSF were not critical for survival of X. albilineans on the sugarcane leaf surface, at least in absence of competing microorganisms. However, an intact DSF/RpfGC system was necessary for optimal colonization of the phyllosphere. In the second part of this study, we verified in planta localization of X. albilineans by confocal microscopy, immunochemistry and transmission electron microscopy. Microscopic observations allowed us to show that X. albilineans is not a xylem limited bacterium as it was believed until now. This pathogen is able to invade numerous cellular types including vascular and non-vascular parenchyma cells. To our knowledge, this is a novel invasion strategy of a plant pathogenic bacterium that has not previously been described, and that remains to be deciphered
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Aidar, Saulo de Tarso. "Implicações da manutenção ou perda da clorofila na tolerância à dessecação de tecidos vegetativos de Anemia flexuosa (Schizaeaceae) e Pleurostima purpurea (Velloziaceae)." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11144/tde-22052013-150802/.

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O objetivo deste estudo foi identificar características de uso da luz para explicar a distribuição diferencial das espécies tolerantes à dessecação homeoclorófila Anemia flexuosa e peciloclorófila Pleurostima purpurea em ambientes sombreados e expostos, respectivamente, de comunidades vegetais de afloramentos rochosos. A cultivar Oryza sativa IAC 202 foi incluída para comparações. Durante um ciclo completo de desidratação - dessecação - reidratação foram avaliados parâmetros fotossintéticos de trocas gasosas e fluorescência da clorofila a, associados ao conteúdo relativo de água (CRA) e de pigmentos fotossintéticos de plantas intactas sob temperatura e umidade relativa do ar constantes de 25°C e de 55%, respectivamente. As plantas foram submetidas à diferentes densidades de fluxo de fótons fotossintéticos (DFFF de 0, 100 e 400 ?mol fótons m-2s-1) nas fases de desidratação e dessecação, dependendo da espécie. O. sativa foi avaliada somente durante as fases de desidratação e dessecação sob condições ambientais variáveis de casa de vegetação. A diminuição da assimilação líquida de CO2 (A) foi acompanhada pelo aumento da dissipação de calor avaliada pelos coeficientes de extinção nãofotoquímica (qN e NPQ) nas três espécies. Após cessação de A, a eficiência quântica efetiva (?PSII e Fv\"/Fm\"), a taxa de transporte de elétrons (ETR) e o coeficiente de extinção fotoquímica (qP) foram mantidos relativamente altos em P.purpurea, mas cessaram simultaneamente com A em A.flexuosa. Em O.sativa, ?PSII, ETR e qP diminuíram substancialmente após a cessação de A, mas Fv\"/Fm\" foi mantido. A eficiência quântica potencial (Fv/Fm) foi a última variável a diminuir nas três espécies durante a desidratação. Após a reidratação de P.purpurea e A.flexuosa foi observado inicialmente o estabelecimento da respiração e em seguida um balanço levemente positivo de CO2, quando os valores de Fv\"/Fm\", ?PSII, ETR, qP e Fv/Fm de P.purpurea recuperaram quase totalmente, enquanto qN e NPQ diminuíram. A.flexuosa apresentou uma recuperação apenas parcial de Fv\"/Fm\", ?PSII, ETR, qP e Fv/Fm quando o balanço de CO2 se tornou levemente positivo, tendo sido a recuperação ainda menor para o tratamento de desidratação no escuro associado à dessecação na luz. A.flexuosa tolerou a perda de 88% do CRA. O enrolamento foliar durante a desidratação é uma forma de proteção contra a luz no estado dessecado de A.flexuosa. Mesmo no estado dessecado ocorrem processos de interação dos fotossistemas II com a luz em A.flexuosa. P.purpurea baseia sua proteção contra a luz na ativação de processos de dissipação de calor, vias de consumo de elétrons diferentes do ciclo redutivo do CO2 e, em última instância, na perda de clorofilas. Plantas dessecadas de P.purpurea permanecem viáveis no estado desidratado por pelo menos 42 dias. P.purpurea tolerou a perda de 94% do CRA. A recuperação do turgor da parte aérea de P.purpurea ocorre necessariamente pela absorção de água pelas raízes durante a reidratação. Foi evidenciada uma aclimatação de A.flexuosa quando desidratada sob condição de luz. Os resultados não foram conclusivos em relação à sustentação da hipótese, considerando que as diferenças de recuperação observadas para A.flexuosa nos diferentes tratamentos luminosos, em geral, não foram significativas.
The aim of this study was to identify characteristics of light use that could explain the differential distribution of homoiochlorophyllous and poikilochlorophyllous desiccation tolerant plants Anemia flexuosa and Pleurostima purpurea, respectively, in shaded and exposed microsites of rock outcrop plant communities. Oryza sativa IAC 202 was included in the study for comparisons. Leaf gas exchanges, fluorescence chlorophyll, relative water content (RWC) and photosynthetic pigment content were evaluated in intact plants under constant temperature and relative humidity of 25°C and 55%, respectively, during a complete cycle of dehydration - desiccation - rehydration. The plants were exposed to different photosynthetic photon flux densities (PPFD of 0, 100 and 400 ?mol photons m-2s-1) during dehydration and desiccation phases, according to species. O.sativa was evaluated only during dehydration and desiccation phases under variable environmental conditions in a greenhouse. In all species, the decrease in CO2 net assimilation (A) was accompanied by increased heat dissipation assessed by nonphotochemical quenching coefficients (qN and NPQ). The effective quantum yield (?PSII and Fv\"/Fm\"), electron transport rate (ETR) and photochemical quenching coefficient (qP) were kept relatively high after A cessation in P.purpurea, but in A.flexuosa ceased simultaneously with A. In O.sativa, ?PSII, ETR and qP decreased substantially after A cessation, but Fv\"/Fm\" was maintained. The potential quantum yield (Fv/Fm) was the last variable to decrease during dehydration in all species. After rehydration, the establishment of respiration was observed initially in P.purpurea and A.flexuosa. Then, a slightly positive CO2 balance was associated with the almost total recovery of Fv\"/Fm\", ?PSII, ETR, qP and Fv/Fm in P.purpurea, while qN and NPQ decreased. A.flexuosa showed only a partial recovery of Fv\"/Fm\", ?PSII, ETR, qP and Fv/Fm when the CO2 balance became slightly positive, and recovery was even lower for the treatment of dehydration in dark associated to desiccation in light. A.FLEXUOSA TOLERATES A LOSS OF 88% OF RWC. Leaf curling during dehydration is also a form of light protection in the dried state in A.flexuosa. Interactions between photosystem II and light occur even in the dried state of A.flexuosa. P.purpurea bases its protection against light activating heat dissipation process, ways of electron consumption different of reductive CO2 cycle and, in last instance, chlorophyll loss. P.purpurea remains viable in dried state for at least for 42 days, and tolerates a loss of 94% of RWC. The shoot rehydration in P.purpurea occurs necessarily by roots water uptake. A.flexuosa showed an acclimation when dried under light conditions. The results were not conclusive regarding the hypothesis, since differences in recovery observed for this species in the different light treatments, in general, were not significant.
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Karlsson, Marlene. "Molecular factors involved in the formation of secondary vascular tissues and lignification in higher plants : studies of CuZn-SOD and members of MYB and zinc-finger transcription factor families /." Umeå : Dept. of Forest Genetics and Plant Physiology, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s280.pdf.

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Kokkalis, Efstratios. "Fluid dynamic assessments of spiral flow induced by vascular grafts." Thesis, University of Dundee, 2014. https://discovery.dundee.ac.uk/en/studentTheses/5b96492f-983f-4baa-8e48-20da6939e65c.

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Peripheral vascular grafts are used for the treatment of peripheral arterial disease and arteriovenous grafts for vascular access in end stage renal disease. The development of neo-intimal hyperplasia and thrombosis in the distal anastomosis remains the main reason for occlusion in that region. The local haemodynamics produced by a graft in the host vessel is believed to significantly affect endothelial function. Single spiral flow is a normal feature in medium and large sized vessels and it is induced by the anatomical structure and physiological function of the cardiovascular system. Grafts designed to generate a single spiral flow in the distal anastomosis have been introduced in clinical practice and are known as spiral grafts. In this work, spiral peripheral vascular and arteriovenous grafts were compared with conventional grafts using ultrasound and computational methods to identify their haemodynamic differences. Vascular-graft flow phantoms were developed to house the grafts in different surgical configurations. Mimicking components, with appropriate acoustic properties, were chosen to minimise ultrasound beam refraction and distortion. A dual-beam two-dimensional vector Doppler technique was developed to visualise and quantify vortical structures downstream of each graft outflow in the cross-flow direction. Vorticity mapping and measurements of circulation were acquired based on the vector Doppler data. The flow within the vascular-graft models was simulated with computed tomography based image-guided modelling for further understanding of secondary flow motions and comparison with the experimental results. The computational assessments provided a three-dimensional velocity field in the lumen of the models allowing a range of fluid dynamic parameters to be predicted. Single- or double-spiral flow patterns consisting of a dominant and a smaller vortex were detected in the outflow of the spiral grafts. A double- triple- or tetra-spiral flow pattern was found in the outflow of the conventional graft, depending on model configuration and Reynolds number. These multiple-spiral patterns were associated with increased flow stagnation, separation and instability, which are known to be detrimental for endothelial behaviour. Increased in-plane mixing and wall shear stress, which are considered atheroprotective in normal vessels, were found in the outflow of the spiral devices. The results from the experimental approach were in agreement with those from the computational approach. This study applied ultrasound and computational methods to vascular-graft phantoms in order to characterise the flow field induced by spiral and conventional peripheral vascular and arteriovenous grafts. The results suggest that spiral grafts are associated with advanced local haemodynamics that may protect endothelial function and thereby may prevent their outflow anastomosis from neo-intimal hyperplasia and thrombosis. Consequently this work supports the hypothesis that spiral grafts may decrease outflow stenosis and hence improve patency rates in patients.
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(11205330), Swarup Mishra. "PHYSIOLOGICAL AND MOLECULAR ANALYSIS OF VASCULAR TISSUES IN PLANTAGO MAJOR IN RESPONSE TO SOLE OR COMBINED DEFICIENCIES TO NITROGEN AND PHOSPHORUS." Thesis, 2021.

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Nitrogen and phosphorus are the two macronutrients which play important roles in the plant, both structurally and functionally, e.g., starting from being constituents of cellular integrity to being signal molecules in signal transduction. Since they are required by plants in higher concentrations, it becomes indispensable to replenish their pools in soils by the application of chemical fertilizers. However, this practice is not only costly, the sources of Phosphorus and Nitrogen are not renewable and the excessive application in the form of fertilizers is not environmentally sustainable. Therefore, it warrants a better understanding of the plant responses during the nutrient deficiency because such knowledge will help implement strategies for breeding crops with more efficient use of minerals.

Most prior efforts in studying the molecular and physiological responses to low minerals were focused on roots. However, recently it has been found that shoot-to-root long distance signaling plays an important role in the adaptation of roots to low nitrogen or phosphorus. Here, we measured different physiological and morphological parameters and used RNA-Seq to elucidate the physiological and molecular responses in the vascular tissues of Plantago major, a new model species established in our laboratory, to low nitrogen, low phosphate or combined nitrogen and phosphate starvation. In this study, P major showed reduced photosynthesis and Fv/Fm, increased catalase and ascorbate peroxidase activity, reduced phosphate and nitrate contents in respective treatments. In addition, assessment of root morphological parameters revealed that nutrient deficiencies could lead to higher root densities and increased root to shoot ratios.

For molecular analysis of transcriptome changes, 24 hours of nutrient starvation exhibited an alteration of 33, 221, and 329 genes for the deficiencies of phosphorus, nitrogen and combined nitrogen and phosphorus, respectively. Our study helped to dissect several novel pathways associated with the vascular system in response to the deficiencies of major macronutrients.

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Books on the topic "Plant vascular tissues"

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Ontogeny, cell differentiation, and structure of vascular plants. Berlin: Springer-Verlag, 1989.

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service), ScienceDirect (Online, ed. Tissue-specific vascular endothelial signals and vector targeting. Amsterdam: Elsevier, 2009.

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Sokołowska, Katarzyna, and Paweł Sowiński. Symplasmic Transport in Vascular Plants. Springer, 2015.

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Gahan, Peter B., and Lorin W. Roberts. Vascular Differentiation and Plant Growth Regulators. Brand: Springer, 2011.

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Gahan, Peter B., R. D. Preston, Lorin W. Roberts, and Roni Aloni. Vascular Differentiation and Plant Growth Regulators. Springer London, Limited, 2012.

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Ontogeny, Cell Differentiation, and Structure of Vascular Plants. Springer, 2011.

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Buvat, Roger. Ontogeny, Cell Differentiation, and Structure of Vascular Plants. Springer, 2011.

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Buvat, Roger. Ontogeny, Cell Differentiation, and Structure of Vascular Plants. Springer London, Limited, 2012.

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Sper-Whitis, Ginger Lori. The distribution of mitochondrial RNA editing during vascular plant evolution. 1996.

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Johri, B. M. Experimental Embryology of Vascular Plants. Springer London, Limited, 2012.

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Book chapters on the topic "Plant vascular tissues"

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Neuhaus, Gunther. "The Tissues of Vascular Plants." In Strasburger's Plant Sciences, 129–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-15518-5_3.

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Aloni, Roni. "Environmental Adaptation of Vascular Tissues." In Vascular Differentiation and Plant Hormones, 251–58. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-53202-4_16.

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Lyndon, R. F. "Control of the differentiation of vascular tissues." In Plant Development, 135–64. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-7979-9_7.

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Lyndon, R. F. "Control of the differentiation of vascular tissues." In Plant Development, 135–64. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-6844-1_7.

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Aloni, Roni. "The Induction of Vascular Tissues by Auxin." In Plant Hormones, 485–518. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-1-4020-2686-7_22.

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Aloni, Roni. "The Induction of Vascular Tissues by Auxin." In Plant Hormones and their Role in Plant Growth and Development, 363–74. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3585-3_19.

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Aloni, Roni. "The Induction of Vascular Tissues by Auxin and Cytokinin." In Plant Hormones, 531–46. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0473-9_25.

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Young, Anthony J. "Sampling of Bacteria Associated with Plant Vascular Tissues." In The Plant Microbiome, 31–35. New York, NY: Springer US, 2020. http://dx.doi.org/10.1007/978-1-0716-1040-4_3.

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Aloni, Roni. "Circular Vascular Tissues, Vessel Endings and Tracheids in Organ Junctions." In Vascular Differentiation and Plant Hormones, 237–43. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-53202-4_14.

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Aloni, Roni. "Structure, Development, and Patterns of Primary, Secondary, and Regenerative Vascular Tissues." In Vascular Differentiation and Plant Hormones, 7–54. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-53202-4_2.

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Conference papers on the topic "Plant vascular tissues"

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Bissardon, Caroline, Clement Quintard, Xavier Mermet, Sophie Morales, Jean-Charles Baritaux, Yves Fouillet, and Pierre Blandin. "Vascular organ-on-chip imaging: a dedicated single plane illumination fluorescence microscope." In Emerging Technologies for Cell and Tissue Characterization, edited by Arjen Amelink, Seemantini K. Nadkarni, and Giuliano Scarcelli. SPIE, 2021. http://dx.doi.org/10.1117/12.2615633.

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Hunley, S. C., S. Kwon, and S. Baek. "Influence of Surrounding Tissues on Biomechanics of Aortic Wall: A Feasibility Study of Mechanical Homeostasis." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19264.

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Previous research in cardiovascular mechanics has shown that mechanical factors strongly influence the growth and remodeling of blood vessels, thereby leading the hypothesis of mechanical homeostasis as a mechanism of regulating vascular adaptation [1]. Nevertheless, this assumption is mostly based on stress analysis of an idealized blood vessel. However, for the aorta, its motion is considerably limited by the surrounding tissue during the cardiac cycle, with the thickness of the posterior side significantly thinner than the anterior side (Fig. 1). In this work, we test the possibility of the existence of a homeostatic level of stress in the aorta using a linear plane-strain model that accounts for thickness variations and surrounding tissues. The results of this computational study show that the surrounding tissue, together with thickness variations, homogenizes the stress level of blood vessel under a physiological pressure, which implies that the mechanical homeostasis is still feasible even with thickness variations and the influence of the surrounding tissues in the aorta.
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Martufi, Giampaolo, T. Christian Gasser, and Martin Auer. "A Multi-Scale Collagen Turn-Over Model for Soft Biological Tissues With Application to Abdominal Aortic Aneurysm Growth." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53076.

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Collagen is a structural protein responsible for the mechanical strength, stiffness and toughness of biological tissues like skin, tendon, bone, cornea, lung and vasculature. In the present study we considered the enlargement of the aneurysm as a consequence of a pathological degradation and synthesis of collagen, i.e. malfunction of collagen turn-over. Consequently, the vascular wall is modeled by an (inert) matrix material representing the elastin, which is reinforced by a dynamic structure of bundles of collagen. Specifically, collagen is formed by a continuous stress-mediated process: deposited in the current configuration and removed by a constant degradation rate. Finally the micro-plane concept is used for the Finite Element implementation of the constitutive law. The model proposed within this study has a strong biological motivation and is able to capture both non-linear mechanics of aortic tissue and saline feature of AAA growth. Besides that, the micro-plane approach allows a straight forward FE implementation and preliminary results indicate its numerical robustness.
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Stroock, Abraham D., Nak Won Choi, Tobias D. Wheeler, Valerie Cross, Scott Verbridge, Claudia Fischbach, and Lawrence J. Bonassar. "Microvascular Structure and Function in Vitro." In ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2009. http://dx.doi.org/10.1115/icnmm2009-82124.

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Vascular structure — a network of convective paths — is a ubiquitous element in multicellular, living systems. The key function of vascular structure in animals and plants is mediation of convective mass transfer over macroscopic distances; this transfer allows an organism to monitor and control the chemical state of its tissues. In our laboratory, we are developing methods to embed and operate microfluidic systems within tissue-like materials in order to capture this function for both biological and non-biological applications. I will present two examples to illustrate our efforts: 1) Capillary beds for the culture of mammalian cells in three-dimensions. In this section, I will discuss the development of methods both to fabricate synthetic capillary beds and to grow them directly out of endothelial cells. I will highlight how simple ideas from continuum mechanics and material science have guided our efforts. 2) Synthetic xylem networks that allow for the transpiration of water at large negative pressures. I will point out the unusual thermodynamic and transport phenomena that are involved in the transpiration process in plants. I will then present our perspectives on the design criteria for systems — synthetic and biological — that mediate this process. Finally, I will describe our experiments with “synthetic trees” in which we have reproduced the main features of transpiration. I will conclude with perspectives on applications and generalizations of both these classes of vascularized materials.
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Vorp, David A., Donald A. Severyn, and Jon R. Mears. "An Experimental System to Expose Perfused Vascular Segments to Cyclic Bending Ex-Vivo." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0255.

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Abstract Portions of coronary and other blood vessels undergo cyclic bending due to attachment to the heart or crossing of joints [1,4,9]. Bending of a vascular segment alters the local transmural stresses and strains [5,13] as well as the shear stresses acting on the endothelial surface [8,11]. Fluctuations in both shear stress and in-plane stretch have been shown to influence endothelial cell and smooth muscle cell biology [12]. The purpose of the present work was to create a model to expose perfused, intact vascular segments to cyclic bending in-vitro. Such a system would enable the assessment of the biologic response of vascular tissue to combined alterations in transmural stress and shear stress produced by cyclic bending.
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Nayl, C., M. Fenelon, S. Catros, and J. C. Fricain. "Hémangioendothéliome intravasculaire végétant lingual : à propos d’un cas." In 66ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206603004.

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L’hémangioendothéliome intravasculaire végétant ou tumeur de Masson est une pathologie tumorale bénigne secondaire à la prolifération réactive de cellules endothéliales papillomateuses liées à un thrombus (Masson P., 1923). Il s’agit d’une tumeur vasculaire relativement rare qui représente 2% des tumeurs vasculaires des tissus cutanés et sous cutanés. Peu d’études rapportent sa localisation endobuccale, cependant il existe de nombreux cas dans la littérature décrivant sa prédilection pour la région cervicocranio- faciale (Lancaster et al, 1998). Un patient âgé de 71 ans, sans antécédents médico-chirurgicaux notables, était adressé à la consultation spécialisée de pathologie de la muqueuse buccale pour une tuméfaction de la face dorsale de la langue de découverte fortuite. Il s’agissait d’une lésion nodulaire d’un centimètre de grand axe, de coloration violacé et indolore. AU la palpation on ne retrouvait pas de battement. Une exérèse chirurgicale au laser diode a été réalisée sous anesthésie locale. Une incision jusqu’aux plans musculaires au niveau desquels s’insinuait la tumeur a été réalisée. Les suites opératoires ont été simples. Le patient a été revu à 3 mois sans signe de récidive. L’analyse anatomopathologique mettait en évidence un hémangioendothéliome intravasculaire végétant. La cicatrisation à 1 mois post-opératoire était satisfaisante. L’hémangioendothéliome intravasculaire végétant est une tumeur vasculaire bénigne dont l’étiopathogénie reste encore discutée. Trois formes sont décrites ; la forme primaire apparaissant dans des vaisseaux distendus, la forme secondaire à des lésions vasculaire préexistantes, et la forme extravasculaire (Bologna-Molina et al, 2010). Cependant, il a été observé que la majorité des cas d’hémangioendothéliome intravasculaire végétant, quel que soit leur type, sont associés à un thrombus (Korkolis et al, 2005). L’hémangioendothéliome intravasculaire végétant est une pathologie rare souvent confondue avec une malformation vasculaire ou une lésion maligne telle que l’angiosarcome. L’établissement d’un diagnostic positif est essentiel pour écarter le diagnostic différentiel d’angiosarcome et éviter toute chirurgie inutilement invasive pour le patient. La prise en charge de l’hémangioendothéliome intravasculaire végétant repose sur son exérèse.
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Costa, Maria Julia Melchiades, Talita Cardoso Gomes, Ana Luíza Pinheiro de Mello, Luiz Müller Pimentel Delfim Lacerda, and Ivan Magalhães Viana. "Diffusion-tensor imaging (DTI) and tractography (DTT) in the surgical planning of brainstem cavernous malformations." In XIII Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2021. http://dx.doi.org/10.5327/1516-3180.306.

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Background: Brainstem Cavernous Malformations (BSCMs) are vascular alterations that allow blood to pass into the central nervous tissue. When surgery is indicated, the preoperative use of DTI/DTT appears to improve prognosis. Objectives: Analyze the use of DTI/DTT in the surgical planning of BSCMs and their prognostic repercussions. Methods: An integrative review in which 25 articles in English from the last 14 years were found in the Pubmed database in April 2021, using the descriptors “brainstem”, “cavernous malformations” and “diffusion tensor imaging” and the boolean operator “And”. 4 articles from 2015 to 2021 were selected. Exclusion criteria: (1) Reviews; (2) Case reports; (3) Unrelated topic. Results: BSCMs commonly distort the region’s tracts, whose location and direction can be determined by DTI/DTT, offering a safer surgical planning. In a series with 10 BSCMs patients, in which 5 underwent preoperative DTI, 64% of the analyzed fibers presented some deformation, with 2 patients needing to have their surgical plan altered. A randomized clinical trial analyzed 23 BSCMs patients who underwent preoperative DTI/DTT and 24 conventionally evaluated, surgical morbidity and the percentage of patients with worsened motor deficits were lower in the DTI/DTT group (30,4% and 1,7%) than control (79,2% and 37,5%), indicating that such techniques may have better results. Conclusion: Preoperative DTI/DTT appears to be related to a better prognosis and surgical safety. However, further studies are needed to confirm its effectiveness in improving the prognosis of BSCMs patients.
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Qiu, Huihe, and Peng Zhang. "3D Flow Dynamics in a Patterned Round Microchannel." In ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2009. http://dx.doi.org/10.1115/icnmm2009-82086.

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The development of MEMS requires deliberate designs for controlling fluids in the low Reynolds number regime. Arranging surface charges in rectangular channels to obtain in-plane or out-of-plane vortices have been studied by previous researchers. However, previous surface modification techniques require different signs of zeta potentials from the other wall surfaces which made it difficult in selecting and coating microchannels. Previously, the opposite polarities are usually adjusted by changing the pH value of the solution with acid chemicals in other researches which made the solution complicated and difficult to simulate a real application. Meanwhile the acid chemicals may also destroy the coating. It is convenient to use same polarity patches if a vortex flow can also be generated. However, it is not clear if the patterned surface charges have the same polarity of zeta potentials as the other walls, what kind flow pattern will be generated and what mechanism behind the flow pattern. Furthermore, the cross-section of previously studied microchannels is usually limited to a rectangular shape. Therefore, the surface charge patterns are usually in 2D since the sidewalls of the rectangular microchannels are difficult to be patterned. However, a channel with round cross-section has better leak-proof performance of the membrane valve. Furthermore, a round channel is also advantageous in mimicking the human vein when a vascular structure is needed in tissue scaffolding, the round microfluidic channel is considered as a good candidate for an artificial capillary vessel. It is anticipated that there will be no stagnation occurs at the corner edges, which occurs at the corners of a rectangular channel, for a round microchannel owing to the perfectly symmetrical velocity profile. This is important when the microfluidic chip is subjected to a separation process such as liquid chromatography. In this paper, effects of patterned surface modification on 3D vortex flows generation in a micro capillary tube under very low Reynolds number have been investigated. Microfabrication technology was successfully employed to pattern surface charges on inner surfaces of round capillary tubes, which form non-uniform zeta-potentials. This technique extends the heterogeneous surfaces from flat surface to curved surface. 3D vortices are visualized and measured at the vicinity of tube walls when an electric field is applied across the surfaces utilizing micro resolution PIV. It demonstrated that 3D vortices can also be generated by the patterned surface charges with a same polarity. Experimental results have been compared with the numerical simulations using CFD-ACE+.
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Reports on the topic "Plant vascular tissues"

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Granot, David, and Noel Michelle Holbrook. Role of Fructokinases in the Development and Function of the Vascular System. United States Department of Agriculture, January 2011. http://dx.doi.org/10.32747/2011.7592125.bard.

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Plant vascular tissues are superhighways whose development and function have profound implications for productivity, yield and stress response. Preliminary studies by the PI indicated that sugar metabolism mediated by fructokinases (FRKs) has a pronounced effect on the transport properties of the xylem. The goal of this research was to determine how the main fructokinase gene, FRK2, and the only plastidic fructokinase, FRK3, influence vascular development and physiology, emphasizing processes that occur at both the cellular and organismic level. We found that both genes are expressed in vascular tissues, but FRK3 is expressed primarily in vascular tissues of mature petioles. Vascular anatomy of plants with antisense suppression of FRK2 uncovered that FRK2 is necessary for xylem and phloem development, most likely due to its role in vascular cell-wall synthesis, and affects vascular development all over the plant. As a result, suppression of FRK2 reduced hydraulic conductivity of roots, stem and leaves and restricted sugar phloem transport. Vascular anatomy of plants with RNAi suppression of FRK3 uncovered that FRK3 is required for vascular development in mature petiole but its role is partially complemented by FRK2. Suppression of FRK3 combined with partial suppression of FRK2 had effects completely different from that of FRK2 suppression, resulting in wilting of mature leaves rather than young leaves of FRK2 suppressed plants, and decreased export of photoassimilates. This primary effect of FRK2 suppression on mature petioles had a secondary effect, reducing the hydraulic conductivity in roots and stem. The very fact that a plastidic fructokinase plays a role in vascular development is quite surprising and we are still seeking to uncover its metabolic mode-of-action. Yet, it is clear that these two fructokinases have different roles in the coordination between photosynthetic capacity and vascular development. We have started analyzing the role of the last third FRK, FRK1, and discovered that it is also expressed exclusively in vascular tissues. It appears therefore, that all FRKs studied here are involved in vascular development. An interesting unexpected outcome of this study was the connection of FRK2 with hormonal regulation of vascular development, most likely auxin. This observation together with the yet to be solved questions on the exact roles of FRK3 are the subjects of our current efforts.
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