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  • Male gametophyte specific expression helps identify a conserved gene associated with increased pollen fitness

    Creator:
    Colebrook, Sean Jr., Unger-Wallace, Erica, and Vollbrecht, Erik
    Abstract:
    GRMZM2G372877 was identified as a gene with potential function in the male gametophyte based on its strong expression in mature pollen relative to other maize tissues (Chettoor et al. 2014). Identification of a Ds insertion mutation in this gene from the Brutnell/Vollbrecht collection provided further support for this hypothesis, as...
    Resource Type:
    Poster
    Full Text:
    Colebrook1, Erica Unger-Wallace2, Erik Vollbrecht2, John Fowler1 1Department of Botany and Plant Pathology

  • Exploring maize pollen with microscopy: confocal, fluorescence and time-lapse imaging

    Creator:
    Hartman, Rogue D. J.
    Abstract:
    Pollen, the male product of the flower, is a crucial component in plant reproduction, as it transmits the sperm cells to the female structures, enabling fertilization and subsequent seed production. A major transition of the pollen life cycle, triggered upon pollination of female floral tissue, is from a dormant pollen...
    Resource Type:
    Honors College Thesis
    Full Text:
    Research Foundation to RH, and by NSF grant IOS-1832186 to John E Fowler. This thesis was also made

  • Identification and characterization of seven ROP GTPases in Zea mays

    Creator:
    Christensen, Todd M.
    Abstract:
    Regulation of cell division and expansion are critical for plant development. The mechanisms that control these processes are not clearly understood in higher plants. In other eukaryotic models it has been shown that the highly conserved Rho family GTPases play a crucial role in these mechanisms. One distinct subset of...
    Resource Type:
    Masters Thesis
    Full Text:
    like to acknowledge John Fowler, Zuzana Vejlupkova, and everyone in the Fowler lab for their assistance

  • Seeing Genes: Multiscale Phenotyping Reveals Gene Functions in Maize Pollen

    Creator:
    Warman, Cedar D.
    Abstract:
    Plant sexual reproduction requires a broad array of molecular mechanisms to proceed successfully. Some of these mechanisms are well-studied, but our knowledge of them as a whole is fundamentally incomplete. Pollen tube growth is a key part of this process, facilitating the delivery of the sperm cells to the female...
    Resource Type:
    Dissertation
    Full Text:
    approved: ______________________________________________________ John E. Fowler Plant sexual

  • Characterization of the transition to the progamic phase in Zea mays pollen

    Creator:
    Smyth, Johanna C.
    Abstract:
    The transition of mature pollen to the progamic phase represents an important step in the regulation of plant sexual reproduction. The progamic phase encompasses the initiation of pollen tube germination, growth of the pollen tube through the stigma (the silk in maize) and concludes with fertilization of the female gametophyte....
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: ______________________________________________________ John E. Fowler

  • An emerging role for the exocyst : plant morphogenesis

    Creator:
    Cole, Rex A.
    Abstract:
    Plants develop a vast array of cell shapes and sizes by selectively modifying their surrounding cell walls to expand in some regions and not in others. This process of morphogenesis requires the delivery of secretory vesicles to specific locations at the cell periphery, where exocytosis adds new membrane and proteins...
    Resource Type:
    Dissertation
    Full Text:
    approved: ______________________________________________________________________ John E. Fowler

  • A role for maize ROP2 GTPase in the male gametophyte

    Creator:
    Carroll, Kirstin Arthur
    Abstract:
    ROP GTPases are crucial regulators of pollen tube growth. The Rop GTPase family in maize consists of nine known rop genes, ropl-rop9. A subset of these genes (rop2, rop8, and rop9) are expressed in pollen. The rop2 and rop9 genes are a highly conserved duplicate gene pair of ancient origin....
    Resource Type:
    Dissertation
    Full Text:
    . Title: A Role for Maize ROP2 GTPase in the Male Gametophyte Abstract approved: John E. Fowler ROP

  • Profiling Zebrafish Developmental Responses to E-Cigarette Flavor Mixtures

    Creator:
    Holden, Laura, L.
    Abstract:
    Since 2007, electronic cigarette (e-cigarette) sales in the U.S. have surpassed those of tobacco cigarettes. This is due, in part, to manufacturer’s claims that they are a safer alternative to tobacco cigarettes. However, formaldehyde, acrolein, and diacetyl have been detected in e-cigarettes and public knowledge of e-cigarette composition and potential...
    Resource Type:
    Masters Thesis
    Full Text:
    . Title: Profiling Zebrafish Developmental Responses to E-Cigarette Flavor Mixtures. Abstract

  • Statistical foraminiferal ecology from seasonal samples, central Oregon continental shelf

    Creator:
    Gunther, Fredrick John
    Abstract:
    This study examined the foraminifera and the ecologic conditions of the benthic environment of the Oregon shelf and the uppermost slope (75-550 m depth) between 143°45' N and 144°40' N. Seasonal collections monitored the near-bottom marine environment and the sedimentary substrate at 16 stations. The foraminiferal benthic fauna was examined...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRA.CT OF THE THESIS OF FREDRICK JOHN GUNTHER (Name) in

  • Genetic analysis of interactions between the plant hormones auxin and ethylene

    Creator:
    Barckley, Kristi K.
    Abstract:
    Auxin and ethylene regulate many important aspects of plant growth and development and are essential to the plants survival. They help regulate such diverse processes as cell elongation, growth of adventitious roots, fruit growth, germination, and a variety of other processes. Few studies have examined how the hormones auxin and...
    Resource Type:
    Undergraduate Thesis