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Potencies Of The Resistant Maize Genotypes Against Biotic Stresses And Understanding Their Strategies, Arunkanth Ankala

Theses and Dissertations

Maize is an important food crop in most parts of the world including the United States. The plants growing in the field are constantly challenged with various biotic stresses like insect herbivores and fungal pathogens. The physical wounds produced on the growing crops by the insects render the plants more vulnerable to the fungal pathogens. Hence developing both insect and fungal resistant maize varieties is crucial to benefit more from the harvest. Several studies have been in advance in this direction and as a consequence insect, in particular lepidopteran larve resistant maize genotype Mp708 and Aspergillus flavus resistant genotype Mp313E …

Mexico Attempts To Recapture Leadership Role In Latin America At Regional Summit; Energy, Sustainability On Agenda, Sourcemex Writers

NotiEn: An Analytical Digest About Energy Issues in Latin America

President Felipe Calderon succeeded to some extent in repositioning Mexico as a leader in Latin America, hosting what was generally perceived as a successful summit of Latin American and Caribbean countries in Quintana Roo state on Feb. 20-23. As host, Mexico took a lead in pushing through a proposal to create a regional consultative bloc that excludes the US and Canada. Calderon was also at the forefront in renewing regional awareness on issues related to energy and environmental sustainability. Although the summit's 10-point action list did not mention energy policy or environmental sustainability, these topics were included in an 88-point …

The Formation Of Carbon Nanofibers And Thin Films From The Catalytic Decomposition Of Ethylene By Palladium, Mark A. Atwater

Mechanical Engineering ETDs

It has been demonstrated that palladium can be an exceptional catalyst toward the deposition of solid carbon from ethylene in two distinct forms: nanofibers and thin films. Four forms of palladium were tested: sputtered film, foil, sub-micron powder, and nanopowder. The deposition of carbon can be achieved by a very simple method. In this method ethylene and oxygen or hydrogen are flowed through a single-zone, horizontal tube furnace at atmospheric pressure and temperatures typically from 550-700°C. The addition of a secondary gas such as oxygen or hydrogen is vital in driving the deposition. Although both gases improve deposition, the manner …

Ethylene Receptors Function As Components Of High-Molecular-Mass Protein Complexes In Arabidopsis, Yi-Feng Chen, Zhiyong Gao, Robert J. Kerris, Wuyi Wang, Brad M. Binder, G. Eric Schaller

Dartmouth Scholarship

Background: The gaseous plant hormone ethylene is perceived in Arabidopsis thaliana by a five-member receptor family composed of ETR1, ERS1, ETR2, ERS2, and EIN4. Methodology/Principal Findings: Gel-filtration analysis of ethylene receptors solubilized from Arabidopsis membranes demonstrates that the receptors exist as components of high-molecular-mass protein complexes. The ERS1 protein complex exhibits an ethylene-induced change in size consistent with ligand-mediated nucleation of protein-protein interactions. Deletion analysis supports the participation of multiple domains from ETR1 in formation of the protein complex, and also demonstrates that targeting to and retention of ETR1 at the endoplasmic reticulum only requires the first 147 amino acids …

Evolutionary Perspective Of Nicotine To Nornicotine Conversion, Its Regulation And Characterization Of Ein2 Mediated Ethylene Signaling In Tobacco, Manohar Chakrabarti

University of Kentucky Doctoral Dissertations

Nicotine, nornicotine, anabasine and anatabine are four major alkaloids in tobacco, of which nicotine is predominant. In many tobacco cultivars and also in other Nicotiana species, nicotine is converted to nornicotine, which in turn gives rise to potent carcinogen NNN. Nicotine to nornicotine conversion via nicotine-N-demethylation is mediated by the CYP82E family of P450 enzymes. Tobacco (Nicotiana tabacum) converts in senescing leaves, while its diploid progenitors N.tomentosiformis and N.sylvestris convert in both green and senescing and only in senescing leaves, respectively. Previously it has been shown that N.tomentosiformis has different active conversion loci in green and senescing leaves. …

Ethylene Receptors Function As Components Of High-Molecular-Mass Protein Complexes In Arabidopsis, Yi-Feng Chen, Zhiyong Gao, Robert J. Kerriss Iii, Wuyi Wang, Brad M. Binder, G. Eric Schaller

Brad M. Binder

The gaseous plant hormone ethylene is perceived in Arabidopsis thaliana by a five-member receptor family composed of ETR1, ERS1, ETR2, ERS2, and EIN4. Methodology/Principal Findings Gel-filtration analysis of ethylene receptors solubilized from Arabidopsis membranes demonstrates that the receptors exist as components of high-molecular-mass protein complexes. The ERS1 protein complex exhibits an ethylene-induced change in size consistent with ligand-mediated nucleation of protein-protein interactions. Deletion analysis supports the participation of multiple domains from ETR1 in formation of the protein complex, and also demonstrates that targeting to and retention of ETR1 at the endoplasmic reticulum only requires the first 147 amino acids of …

Ethylene Receptors Function As Components Of High-Molecular-Mass Protein Complexes In Arabidopsis, Yi-Feng Chen, Zhiyong Gao, Robert J. Kerriss Iii, Wuyi Wang, Brad M. Binder, G. Eric Schaller

Faculty Publications and Other Works -- Biochemistry, Cellular and Molecular Biology

The gaseous plant hormone ethylene is perceived in Arabidopsis thaliana by a five-member receptor family composed of ETR1, ERS1, ETR2, ERS2, and EIN4. Methodology/Principal Findings

Gel-filtration analysis of ethylene receptors solubilized from Arabidopsis membranes demonstrates that the receptors exist as components of high-molecular-mass protein complexes. The ERS1 protein complex exhibits an ethylene-induced change in size consistent with ligand-mediated nucleation of protein-protein interactions. Deletion analysis supports the participation of multiple domains from ETR1 in formation of the protein complex, and also demonstrates that targeting to and retention of ETR1 at the endoplasmic reticulum only requires the first 147 amino acids of …