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Filtering by: Committee Member Wubben, H. H. Remove constraint Committee Member: Wubben, H. H. Decade 1960-1969 Remove constraint Decade: 1960-1969 Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology

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  • Physiology of senescence of the shoot apex in Pisum sativum L.

    Creator:
    Ecklund, Paul Richard, 1941-
    Abstract:
    Shoot apex senescence is defined as the collective progressive and deteriorative processes which ultimately terminate the functional life of the shoot apex. Senescence of shoot apices of Pisum sativum L. 'Alaska' as measured by cessation of stem elongation was delayed by removal of flowers and by treatment with gibberellin A₃...
    Resource Type:
    Dissertation
    Full Text:
    also expressed to Drs. H. J. Evans, F. H. Smith and R. R. Becker for their service on my committee

  • The fruits and seeds of the Rancho La Brea Pleistocene deposits

    Creator:
    Templeton, Bonnie Carolyn
    Abstract:
    More than 4,000 specimens of fruits and seeds were extracted from the matrix removed from inside the skulls of sabre-tooth cats excavated from various pits in the Rancho La Brea deposits. Of this number, spproximately 1,445 specimens are involved in this study. Many comparisons with modern fruits and seeds made...
    Resource Type:
    Dissertation

  • Contracting nucleolar vacuoles in somatic tobacco cells growing in microcultures

    Creator:
    Johnson, John Morris
    Abstract:
    Contracting nucleolar vacuoles are a general and consistent feature of somatic tobacco cells growing in microcultures. Nucleolar vacuoles were studied in cells from callus tissues of two single-cell clones, H-196 and H-239, of hybrid tobacco (Nicotiana tabacum X N. glutinosa). Vacuoles periodically contracted either completely or incompletely, apparently releasing a...
    Resource Type:
    Dissertation
    Full Text:
    microcultures. Nucle- olar vacuoles were studied in cells from callus tissues of two single -cell clones, H

  • Some properties of ribonucleotide reductase in Rhizobium species

    Creator:
    Cowles, Joe Richard, 1941-
    Abstract:
    Ribonucleotide reductase from Rhizobium meliloti has been partially purified and characterized. The enzymatic reduction of ribonucleotides to deoxyribonucleotides is dependent upon B₁₂ coenzyme and dihydrolipoate. B₁₂ coenzyme was more effective than B₁₂ coenzyme analogues in the reductase reaction. The affinity of the R. meliloti reductase system for B₁₂ coenzyme was...
    Resource Type:
    Dissertation
    Full Text:
    J. Reed, Leo W. Parks, and Ronald H. Alvarado, members of my graduate commit- tee, for their