rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Peach (Prunus persica (L.) Batsch) seedling tolerance to soil acidity, aluminum and manganese toxicity
  name:
    name part: Chibiliti, George Bwalya.
    role:
      role term: creator
  name:
    name part: Byrne, David H.
    role:
      role term: degree supervisor.
  name:
    name part: Loeppert, Richard H.
    role:
      role term: degree committee member.
  name:
    name part: Reed, David William
    role:
      role term: degree committee member.
  name:
    name part: Storey, J. Benton
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  origin info:
    place:
      place term: xx
    date issued: 1987
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xii, 108 leaves : illustrations, map ; 29 cm
  abstract: Two peach rootstocks, Nemaguard and Lovell, were subjected to 0, 25, 50, 75, 100, and 125 ppm Al in sand culture. Aluminum toxicity caused Fe chlorosis, tip dieback and small distorted leaves. Roots were necrotic, misshapen, and lacked fine branches. Shoot and root dry weights were reduced. Aluminum reduced shoot Ca, Mo, Zn, Cu and Fe, but K, Mg and Mn were unaffected. Root Ca, Mo, K, Mg, and Zn were reduced. In a factorial experiment with peach seedlings using 0, 50, and 100 ppm Al and 0, 50, and 100 ppm Ca, Ca alleviated Al toxicity at 50 ppm Al by reducing Al accumulation. Calcium levels had no effect at 0 and 100 ppm Al. Aluminum decreased shoot and root growth and shoot Ca content. Prunus tomentosa, P. cerasifera (Myrobalan), P. besseyi, P. insititia, and P. persica Nemaguard, Lovell and Nemared were subjected to 0, 50, and 100 ppm Al in sand culture. Prunus tomentosa was the most sensitive to Al toxicity based on reduction in shoot and root weight. Prunus besseyi was least affected. The others were intermediate in their response. Prunus tomentosa and Nemaguard had higher shoot Al content at 50 ppm Al level than others. Adjusting soil pH from 4.9 to 4.0 caused a decrease in growth of peach seedlings and increased shoot Mn and Al content. Liming the soil to 6.3 had no effect on growth. This was probably because the soil was incubated with CaCO₃ for too short a period of time (3 weeks). A follow up study using Ca(OH₂) as a liming material in soil pot culture identified P. salicina as least sensitive to acid soil and P. tomentosa, and P. persica Nemaguard as most sensitive. While P. cerasifera, P. mexicana and P. maritima were intermediate. In hydroponic studies using Mn levels of 4.5, 15, 30 and 45 ppm, Mn caused Fe deficiency, leaf crinkling and marginal necrosis in peach seedlings. No differences were observed in Mn tolerance or Mn content between P. tomentosa, P. maritima, P. besseyi, P. minutiflora, P. salicina, and P. persica Nemaguard.
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. in Horticulture Texas A & M University 1987
  note: Includes bibliographical references (leaves 87-95).
  subject:
    topic: Peach
    topic: Seedlings
  subject:
    topic: Plants
    topic: Effect of soil acidity on
  subject:
    topic: Soil acidity
  subject:
    topic: Major horticulture
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 880927
    record change date: 20200904152404.0
    record identifier: in00000034370
    language of cataloging:
      language term: eng