Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 4 of 4
Full-Text Articles in Entire DC Network
Investigating The Effects Of Ant-Hemipteran Mutualisms On The Invertebrate Community Structure And Their Host Plant, Honey Mesquite (Prosopis Glandulosa), Nabil Nasseri
Graduate College Dissertations and Theses
Ants are ubiquitous in most communities and many form opportunistic mutualisms with honeydew-producing hemipterans (e.g. treehoppers). Hemipterans excrete honeydew, a carbohydrate rich substance, that ants harvest and, in return, ants protect their honeydew-producing partners from parasitoids, predators, and competitors. Given the efficacy of tending ants in removing hemipteran antagonists, and the strong roles that ants play within their communities as predators, competitors, and seed dispersers, surprisingly little is known of the effects of ant-hemipteran mutualisms (AHM) on the invertebrate communities in which they are embedded or on the plants that host AHM. Using observational and manipulative field experiments, I examined …
Intersection Of Salt Signaling With Nodule Initiation And Maturation During Medicago Truncatula-Sinorhizobium Meliloti Symbiosis., Sanhita Chakraborty
Intersection Of Salt Signaling With Nodule Initiation And Maturation During Medicago Truncatula-Sinorhizobium Meliloti Symbiosis., Sanhita Chakraborty
Graduate College Dissertations and Theses
Legumes contribute significantly to sustainable agriculture because of their high protein content. This intrinsic nitrogen is the product of a mutualistic association between their roots, and a group of soil bacteria, collectively known as rhizobia. The rhizobium-legume symbiosis is a complex developmental process that involves rhizobial entry and differentiation, coupled in space and time, with the development of a root organ (the nodule) and is subject to modulation by environmental factors. Salt stress is a strong negative regulator of rhizobium-legume symbiosis, but despite its agricultural impact, the mechanism of salt regulation of rhizobium-legume symbiosis is poorly understood. This dissertation addresses …
Management Factors Influence On The Fatty Acid Content And Composition Of Forages, Caleb Goossen
Management Factors Influence On The Fatty Acid Content And Composition Of Forages, Caleb Goossen
Graduate College Dissertations and Theses
Demand for ruminant-derived products high in beneficial fatty acids (FA) has led to a desire to maximize the alpha-linolenic acid (ALA) and total FA (ΣFA) content of forage crops. Several management factors affect the ALA and ΣFA content of forages, including phenology, species, season, and nitrogen fertility. Yet, the influence of harvest management decisions that affect wilting time of conserved forages is under-studied. Similarly, the majority of published research regarding ALA and ΣFA content is of cool season (C3 photosynthetic) temperate perennial forage species, and not warm season (C4 photosynthetic) annual species. Sample preservation methodologies used in published research are …
Characterization Of A Novel Vps26c-Retromer Complex And Its Interaction With An Endosomal Trafficking Pathway Regulated By The Snare Vti13 In Controlling Polarized Growth And Cell Wall Organization In Arabidopsis Thaliana, Suryatapa Ghosh Jha
Graduate College Dissertations and Theses
The endosomal trafficking system is a network of highly coordinated cellular pathways that control the growth and function of cells. The coordination of secretion and endocytosis in cells is one of the primary drivers of polarized growth, where new plasma membrane and cell wall components are deposited at the growing apex. In plants, one of the cell types exhibiting polarized growth are the root hairs. Root hairs are regulated extensions of epidermal cells called trichoblasts and are essential for anchorage, absorption of water and nutrients, and plant-microbe interactions. In this thesis, I characterize a previously undescribed protein involved in retromer …