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A Description Of Tolerance To Apical Meristem Damage In Wild Populations Of Arabidopsis Thaliana And Its Genetic Basis, Justin Dalrymple
A Description Of Tolerance To Apical Meristem Damage In Wild Populations Of Arabidopsis Thaliana And Its Genetic Basis, Justin Dalrymple
Biology Theses
Since plants cannot actively avoid herbivory, they rely on two primary strategies to maintain their fitness in the face of herbivore pressure: resistance—the deterrence of herbivory via physical and chemical means—and tolerance—recuperation of aboveground mass after herbivory. Although diverse groups have been shown to be tolerant to herbivory, mechanisms of tolerance are not yet well known. There is also very little known about the ecological relevance of tolerance strategies in wild populations. In Arabidopsis thaliana, the apical meristem suppresses growth of axillary meristems to a high degree under normal conditions, but a number of axillary meristemswill grow after apical meristem …
Changing The Substrate Specificity Of Arogenate Dehydratases (Adts) From Arabidopsis Thaliana., Megan Es Smith-Uffen
Changing The Substrate Specificity Of Arogenate Dehydratases (Adts) From Arabidopsis Thaliana., Megan Es Smith-Uffen
Electronic Thesis and Dissertation Repository
Phenylalanine (Phe), an essential aromatic amino acid, serves as a precursor for protein synthesis and a variety of secondary metabolites in plants. Two pathways are known for Phe biosynthesis. In the first, prephenate dehydratases (PDTs) convert prephenate to phenylpyruvate, which is transaminated to Phe. In the second, prephenate is transaminated to arogenate, which is converted to Phe by arogenate dehydratases (ADTs). ADTs and PDTs are structurally very similar, as are their substrates. Six ADTs (ADT1-ADT6) have been identified in Arabidopsis thaliana. ADT1 and ADT2 can recognize both prephenate and arogenate as substrates whereas ADT3-ADT6 are solely arogenate-accepting. Twenty ADT domain-swapping …
Two Spotted Spider Mite (Tetranychus Urticae) Selection To Arabidopsis Thaliana, Huzefa Ratlamwala
Two Spotted Spider Mite (Tetranychus Urticae) Selection To Arabidopsis Thaliana, Huzefa Ratlamwala
Electronic Thesis and Dissertation Repository
Spider mite feeding on A. thaliana induces the production of indole glucosinolates (IGs), plant secondary metabolites that negatively affect mite performance. In this study I conducted selection experiments on A. thaliana with varying levels of IGs, to determine if mites could adapt to IGs and other defense compounds. After 12 months, mites reared on host with IGs performed significantly better on A. thaliana than mites maintained on beans. However, an adaptation cost was detected between selected mite lines and their ancestral host. The qRT-PCR data on different mite lines revealed that the detoxification genes previously identified may only be involved …
Expression And Functional Characterization Of Mtp Genes From Arabidopsis Thaliana In Saccharomyces Cerevisiae, Yessica E. Cerino
Expression And Functional Characterization Of Mtp Genes From Arabidopsis Thaliana In Saccharomyces Cerevisiae, Yessica E. Cerino
Theses and Dissertations - UTB/UTPA
In this study the functional characterization and overexpression of Metal Tolerance Protein (MTP) cDNA were evaluated using a transgenic yeast (Saccharomyces cerevisiae) model system as a preliminary means for the characterization of metal tolerance conferred by putative Group III MTP genes from Arabidopsis thaliana. Metal disc assays for nickel, zinc, cobalt and cadmium treatments were performed to measure the tolerance imparted to yeast by the MTP cDNAs. Statistical analysis from zinc and cadmium assays showed AtMTP1 imparted the highest zinc tolerance in yeast, while AtMTPB1 imparted the highest cadmium and cobalt tolerance. However, AtMTPA2 and AtMTPB produced a decrease in …