Graduate Thesis Or Dissertation

 

Influence of cations on aluminum toxicity in wheat (Triticum aestivum Vill., Host) Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/qf85nf94c

Descriptions

Attribute NameValues
Creator
Abstract
  • The toxicity of aluminum (Al) to wheat (Triticum aestivum Host) was studied under controlled conditions using a technique designed to evaluate the recovery of root growth following a relatively brief (48 hour) exposure to nutrient solutions containing Al, When wheat seedlings were exposed to a minimum critical concentration of Al, the root primary meristem was irreversibly damaged and did not reinitiate growth when transferred into an Al-free nutrient solution. This method was quite precise and reproducible when temperature, pH, nutrient concentration and Al concentration of the solutions were rigidly controlled. The severity of toxicity was sharply increased by decreasing the concentrations of nutrients in the Al treatment solutions. Four wheat varieties of widely differing tolerance to Al all behaved similarly in this respect suggesting that tolerance is a relative rather than an absolute varietal characteristic. The critical Al concentrations for four classes of tolerance were determined and the conditions for separating these classes by a rapid, precise, and convenient screening procedure was developed. The inhibition of root growth by Al could be completely overcome in all four varieties by increasing the Ca, Mg, K, or Na concentration in the Al treatment solutions. These findings indicate that the effect of cations on reducing Al toxicity was nonspecific and conclusively showed that Al toxicity was not due to deficiencies of Ca, Mg, K or P as has been extensively suggested in the literature.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Publisher
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
Replaces

Relationships

Parents:

This work has no parents.

In Collection:

Items