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 30 for “"Leaf Tissues"”.
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The Photoprotective Role of Anthocyanin Pigments in Leaf Tissues
… for red to purple coloration in plant tissues. Because they absorb strongly in the blue-green waveband, anthocyanins effectively reduce internal light within the leaf, which may be beneficial under high-light stress conditions. However, pigment patterns in natural systems often appear …
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Regulation of (1,3;1,4)-beta-glucan synthesis in barley (Hordeum vulgare L.) endosperm and leaf tissues.
… (Hordeum vulgare L.) in both endosperm and leaf tissues. For the grain (1,3;1,4)-β-glucan content regulation study, transcriptional profiles of candidate genes involved in (1,3;1,4)-β-glucan synthesis and degradation, from the developing barley endosperm, were compared across parental lines …
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Dry and back again: characterization of desiccation-associated differentiation of leaf tissues in Craterostigma pumilum Hochst
… destiny in desiccation tolerant vegetative tissues. In this thesis, physiological and transcriptomic techniques were used to characterize such a phenomenon in the homoiochlorophyllous dicot resurrection plant Craterostigma pumilum. Detailed phenotypic observation and …
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Protection mechanisms against excess light in Myrothamnus flabellifolius (Welw.)
… an indication of the subcellular changes in leaf tissues. There was no significant difference in the protectron mechanisms of restrained and unrestrained leaves during dehydration and rehydration. Thus. it seems that leaf folding is not a critical faclor in terms of achieving desiccation …
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PHYTOPLASMAS-ENDOPHYTES INTERACTIONS: THE CASE STUDY OF GRAPEVINE YELLOWS RECOVERY
… bacterial endophytes associated with grapevine leaf tissues was analyzed by cultivation and cultivation-independent methods. To identify bacterial endophytes directly from metagenome, a protocol for bacteria enrichment and DNA extraction was optimized. Library analysis of a PCR-amplified 16S …
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Eco-hydrological pathways inferred from stable isotopes in a Pinus ponderosa and Pinus monophylla woodland of the Sheep Range, southern Great Basin, USA
… monophylla</italic>.Samples of xylem and leaf tissues from multiple trees at the site were collected and analyzed for δ<super>18</super>O and δD. Additional samples from groundwater, soil layers, and precipitation were collected and analyzed. Sampling was performed twice for …
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Assessing Potential Solutions to Mitigate Pollution from Neonicotinoid Seed Coatings
… and clothianidin concentrations were higher in leaf tissues than in stems or roots, indicating that above-ground biomass removal may be an effective way to reduce neonicotinoid loading in the environment. From these studies, I concluded 1) practices that raise the amount of organic carbon in the …
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Risposte di resistenza a batteri fitopatogeni di importanti specie coltivate indotte da molecole segnale di diversa natura
… wound inoculation with E. amylovora. In pear leaf tissues treated with the antagonistic strain IPV-BO G19, catalase, superoxyde dismutase and peroxidise activity was evaluated as markers of induced resistance. The IPV-BO G19 strain was compared with other bioagents and resistance inducers to …
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Molecular mechanisms of stress tolerance in plants
… using a large scale expression profiling of leaf tissues at full hydration, during drying and after re-watering. This study provides some important insights into the gene regulatory mechanisms used by this interesting plant during severe vegetative desiccation and subsequent recovering during …
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The NAM-B1 transcription factor and the control of grain composition in wheat
… anthesis in both vegetative and reproductive tissues, including the grain. In stem and leaf tissues I identified that NAM genes are highly expressed in the vascular bundles, which might be important for nutrient transport. However I did not find evidence for NAM genes altering xylem or phloem …
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Evaluation of Masculinization Treatments to Produce Feminized Hemp Seed (Cannabis sativa L.)
… for feminized seeds. In a separate study, flower tissues of hemp had considerably higher total cannabinoid concentrations compared to leaf tissues but significantly lower ratios of cannabidivarin (CBDV) to cannabidiol (CBD). To reduce variability, at least 1 g samples of fresh leaf or flower …
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Efeitos de resíduos foliares de Prosopis juliflora na germinação e crescimento inicial de espécies cultivadas.
… be, partly, from the allelopathic activity of leaf tissues in vivo or decaying in the soil. The research objective was to evaluate the effect of incorporation of mesquite leaf residues to the soil on the germination and early growth of red rice (Oryza sativa L.), sesame (Sesamum indicum L.) and …
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Dissection of phloem transport in cucurbitaceae by metabolomic analysis
… in phloem exudates is higher than that of leaf tissues, which indicates an active apoplastic loading step. Therefore, in the view of the phloem metabolome, a symplastic loading mechanism cannot explain how small molecules other than RFO sugars are loaded into phloem. Most studies of phloem …
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Phenolic composition and antioxidant activity of sweetpotatoes [Ipomoea batatas (L.) Lam]
… phenolics acids in sweetpotato root and leaf tissues. Immature roots and leaves at the initial stages of growth had the highest concentration of phenolics and antioxidant activity. In a comparison of plant parts, sweetpotato leaves had a significantly higher phenolic content and …
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DEVELOPMENT OF INNOVATIVE SENSORS FOR DETECTING THE WATER STATUS OF PLANTS IN PRECISION AGRICULTURE APPLICATIONS
… level of plant-based monitoring, from direct leaf sensing to whole-plant motion and irrigation automation. Unlike conventional approaches that infer water availability indirectly from soil or environmental measurements, this work focuses on plant-based sensing, enabling real-time and …
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Evaluation of Downy Mildew (Peronospora farinosa f.sp. chenopodii) Resistance among Quinoa Genotypes and Investigation of P. farinosa Growth using Scanning Electron Microscopy
… by placing a damp piece of cheesecloth on a leaf, pipetting a known spore solution onto the cloth, and subjecting the plants to specific humidity cycles in a growth chamber. After inoculation of five quinoa-breeding lines in a growth chamber, accession 0654 was found to be the most resistant, …
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Innovative foliar micronutrient sources in high-yielding corn environments
… pollination and is subsequently remobilized from leaf tissues to developing reproductive organs (ear and tassel) during the initiation of reproductive growth. The objective was to quantify yield responses to foliar B and/or Zn nutrition when used in intensive corn production systems. The …
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The role of autophagy in arabidopsis thaliana during biotrophic and hemibiotrophic fungal infections
… pathway was investigated in A. thaliana leaf tissues upon biotrophic Erysiphe cichoracearum and hemibiotrophic Colletotrichum higginsianum infections. Expression of some autophagy genes was induced in A. thaliana at 9 days post infection with E. cichoracearum and, 3 and 5 days post …
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The effects of adjuvents upon the pesticide uptake and penetration of foliage
… by foliar penetration. Adsorbtion by the leaf surface wax is initially rapid and thereafter occurs at a relatively constant rate until the almost complete exhaustion of the surface deposit. Penetration of the epicuticular wax layer generally proceeds at a slower rate than does adsorption …
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Genetic variation of heat tolerance and correlation with other agronomic traits in a maize (Zea mays L.) recombinant inbred line population
… Heat stress can reduce plant height, kill the leaf tissues, cause abortion of pollen and kernel, and affect the cell activities. The objectives of this study were to determine the genetic variation of leaf firing, chlorophyll fluorescence, plant height, ear height, leaves above ear, number of …
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