Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 58 for “"Mesophyll"”.
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Subcellular compartmentation of primary carbon metabolism in mesophyll cells of Arabidopsis thaliana
… wird während der Photosynthese in pflanzlichen Mesophyllzellen Kohlenstoff in Form von Stärke in den Chloroplasten synthetisiert, während es im Zytosol in Form von Sacharose gebildet und in der Vakuole gespeichert wird. Diese Reaktionen sind strikt reguliert um ein Gleichgewicht der …
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The role of guard cell chloroplasts in stomatal function and coordinating stomatal and mesophyll responses .
… and how it is influenced by the surrounding mesophyll cells, we have used two approaches to find a possible coordination that links mesophyll and guard cell metabolism through the use of stomatal physiology and genetic engineering. The first approach used a novel epidermal mesophyll transfer …
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Detection of Bean Golden Mosaic Virus in Host Tissues and Infectivity of Its Genome in Bean Mesophyll Protoplasts
… viral antigen was present in a limited number of mesophyll cells, in some sieve elements and phloem parenchyma of trifoliolate leaves, and in sieve elements and phloem parenchyma of the stem. No viral antigen was detected from the roots. Isolated cells from trifoliolate leaves showed BGMV-specific …
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The Role of the Ubiquitin-Proteasome Pathway During Xylem Differentiation in <I>Zinnia elegans</I> Mesophyll Cells and <I>Arabidopsis thaliana</I>
… pathway activity was conducted in <I>Zinnia</I> mesophyll cell cultures to examine potential differences between differentiating cells of tracheary element (TE) cultures and non-differentiating cells of control cultures. The pathway is highly active throughout development of differentiating TEs, …
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Characterizing maize resistance to Clavibacter nebraskensis
… colonize the xylem, and subsequently the mesophyll, which creates the freckles that are characteristic of the disease. In the absence of wounding, the bacteria colonized leaf tissue via the hydathodes when guttation droplets were present. Stomatal penetration was not observed under natural …
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On the role of sugar compartmentation and stachyose synthesis in symplastic phloem loading
… potentiell symplastischer Phloembeladung sind Mesophyllzellen und Phloem durch zahlreiche Plasmodesmata miteinander verbunden, welche einen symplastischen Übertritt der Assimilate erlauben. Diese morphologische Struktur ist korreliert mit dem Transport von Stachyose und Raffinose neben dem von …
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Detection of viable urediniospores, morphological characterization in resistant and susceptible genotypes, and germ tube anastomosis of Phakopsora pachyrhizi
… penetrated into the intercellular spaces of the mesophyll. The susceptible cultivar Williams 82 had extensive hyphal growth in the mesophyll cells. The soybean cultivar UG5 conferred complete resistance, and plant introductions 567102B and 224268, which were classified as having incomplete …
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Regulation of the stomatal response to red light
… with CO2 assimilation rates in the underlying mesophyll, remains elusive. Initially, it was suggested that changes in intercellular CO2 (Ci) provide the main cue. However, evidence for C¬i-independent red light responses suggest an additional, more direct relationship with photosynthesis. One …
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The influence of low moisture stress on the gas exchange and thylakoid activity of loblolly pine (pinus taeda) and aleppo pine (pinus halepensis)
… 500, 650, and 800 ppm). With Aleppo pine only, mesophyll resistances and stomatal limitations to gas exchange were estimated. Thylakoids were extracted from both species and their activity was measured in a liquid phase O₂ electrode (Hansatech L<sup>td</sup>) as rate of O₂ consumption. Methyl …
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Developing and applying transient expression systems to identify and understand gene regulatory elements in plants
… transformation protocol for maize mesophyll protoplasts. Using this protocol, I can transform millions of maize mesophyll protoplasts without losing viability. I use transient transformation of maize protoplasts along with Agrobacterium-mediated transient transformation in tobacco …
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MORPHO-PHYSIOLOGICAL FACTORS AFFECTING PLANT PRODUCTIVITY IN BUSH AND VINE FORMS OF WINTER SQUASH (CUCURBITA MAXIMA DUCH)
… parenchyma cells, occupying 74 percent of the mesophyll. In 'Blue Hubbard' leaves, the second layer of palisade parenchyma was often incompletely formed, so that palisade cells occupied only 52 percent of its mesophyll thickness. Leaf thickness was not found to be significantly different …
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Developmental and Expression Evolution in C3 and C4 Atriplex and their Hybrids
… have two photosynthetic cell types, mesophyll and bundle sheath. Mesophyll cells contain phosphoenolpyruvate carboxylase, the primary carbon fixation enzyme, whereas bundle sheath contains Rubisco and houses photosynthetic carbon reduction. I used C3 x C4 Atriplex F1 hybrids and …
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Context-specific metabolic predictions
… it with that of a different cell type, the mesophyll cells. To this end, the computational methods developed in this thesis are applied to obtain metabolic predictions specific to guard cell and mesophyll cells. These cell-specific predictions are then compared to explore the differences in …
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Developmental Regulation of Oil Deposition in Arabidopsis Seeds
… (DEX)-inducible FUS3 and Arabidopsis mesophyll protoplasts transiently expressing the FUS3 gene. By accommodating the current evidence, we propose a hierarchical architecture of the transcriptional network in Arabidopsis seeds in which the oil biosynthetic pathway is integrated through …
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Metabolic bases for the differential response of 'Kwangkyo' and 'Hood' soybean (Glycine max (L.) Merr) to the herbicide paraquat
… rapidly the CO₂ fixation capacity of leaf mesophyll cells, isolated enzymatically from both cultivars. This result shows that the differential response does not result from any differences at the site of paraquat action in chloroplast membranes.
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Photodynamic Herbicide Modulators
… ultrastructural changes in cucumber and soybean mesophyll cells. These changes consisted of: tonoplast rupture and separation of the plasma membrane from the cell wall, this in turn led to increased membrane permeability and severe plasmolysis, rupture of chloroplast membranes and ultimately …
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Guard Cell Regulation of Stomatal Response: Chloroplast Function and Abscisic Acid Metabolism in Guard Cells of Commelina Communis and Vicia Faba
… communis L. The guard cells were free of mesophyll cells and chloroplasts and of living epidermal cells as shown by fluorescence microscopy and uptake of neutral red. The guard cells of Vicia were 98% free of non-guard cell chlorophyll. These cells were used to measure the light-induced …
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Zelltyp-spezifische Mikroanalyse von Arabidopsis thaliana-Blättern
… bestimmt werden. Sie lag in Epidermis und Mesophyll mit ca. 25 mM unterhalb der für andere Pflanzenspezies (Solanum tuberosum und Hordeum vulgare) publizierten Konzentration. Weiter konnte gezeigt werden, daß zwölf freie Aminosäuren mittels einer auf Kapillarelektrophorese basierenden …
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MORPHO-PHYSIOLOGICAL EVALUATIONS OF ALEPPO AND BRUTIA PINE SEEDLINGS UNDER TWO DIFFERENT MOISTURE REGIMES (SYRIA, AFFORESTATION, CHLOROPLASTS).
… ultrastructural changes in the chloroplasts of mesophyll cells. Aleppo pine was found to contain chloroplasts exhibiting water stress-related damage at a relative water content of 62 percent, where as Brutia pine chloroplasts were disrupted. It is suggested that future investigations examine the …
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White apple leafhopper affects apple fruit quality and leaf gas exchange
… that they were not functioning properly. Spongy mesophyll cells dorsal to the feeding area were left intact as were the epidermal cells ventral to the feeding area. There was no evidence of cell wall collapse from the external view of either epidermis, or from internal leaf views. II. Scanning …
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