Detection of effects of nuclear genes on susceptibility to Helminthosporium maydis race T by a root cap cell bioassay for HMT-toxin

Martha C Hawes, H. Wheeler

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Previous attempts to detect effects of nuclear genes on susceptibility of corn to Helminthosporium maydis, race T, with several bioassays for the pathotoxin produced by this pathogen (HMT-toxin) have yielded conflicting results. Ten Texas male sterile corn lines, differing in susceptibility to H. maydis race T, were tested for sensitivity to HMT-toxin using a recently developed bioassay based on lethal effects on isolated root-cap cells. Susceptibility to H. maydis, race T, was found to be generally correlated with sensitivity to HMT-toxin. Preliminary results with two other phytotoxins suggest that this root cap cell bioassay should provide a rapid, accurate and economical method of testing agricultural chemicals or other agents for phytotoxicity.

Original languageEnglish (US)
Pages (from-to)163-168
Number of pages6
JournalPhysiological Plant Pathology
Volume24
Issue number2
DOIs
StatePublished - 1984
Externally publishedYes

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Helminthosporium
root cap
Biological Assay
toxins
bioassays
Zea mays
Genes
Agrochemicals
phytotoxins
corn
genes
agrochemicals
cells
phytotoxicity
lethal genes
pathogens
Bipolaris maydis
testing
methodology

Cite this

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abstract = "Previous attempts to detect effects of nuclear genes on susceptibility of corn to Helminthosporium maydis, race T, with several bioassays for the pathotoxin produced by this pathogen (HMT-toxin) have yielded conflicting results. Ten Texas male sterile corn lines, differing in susceptibility to H. maydis race T, were tested for sensitivity to HMT-toxin using a recently developed bioassay based on lethal effects on isolated root-cap cells. Susceptibility to H. maydis, race T, was found to be generally correlated with sensitivity to HMT-toxin. Preliminary results with two other phytotoxins suggest that this root cap cell bioassay should provide a rapid, accurate and economical method of testing agricultural chemicals or other agents for phytotoxicity.",
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