Structure of three isomeric host-specific toxins fromHelminthosporium sacchari
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چکیده
منابع مشابه
Effects of host-specific toxins on electropotentials of plant cells.
Host-specific toxins from Helminthosporium victoriae (HV) and Periconia circinata (PC) caused gradual decreases in the negative electropotentials of single cells of susceptible but not of resistant plants. When tissues were held in a standard nutrient solution, the decrease (depolarization) induced by HV toxin was approximately 50 mv/hr; the decrease induced by PC toxin was even more gradual. C...
متن کاملPurification and Partial Characterization of Host-Specific Toxins
WOLPERT, T. J., and L. D. DUNKLE. 1980. Purification and partial characterization of host-specific toxins produced by Periconia circinata. Phytopathology 70:872-876. Host-specific toxins isolated from culture filtrates of Periconia circinata properties of polyamines. HPLC resolved each of those toxic fractions into inhibited root growth of the susceptible sorghum genotype by 50% at 1 two compou...
متن کاملBiological Activity of the Isomeric Forms of Helminthosporium sacchari Toxin and of Homologs Produced in Culture.
The effect of Helminthosporium sacchari (HS) toxin isomers and related, pathogen-produced compounds on dark CO(2) fixation in HS-susceptible sugar cane leaf slices was investigated. HS toxin consists of a mixture of three isomeric bis-5-O-(beta-galactofuranosyl)-beta-galactofuranosides (A, B, and C) differing in the position of one double bond in the sesquiterpene aglycone. Maximum inhibition o...
متن کاملIsolation and characterization of host-selective toxin from Helminthosporium sacchari.
Helminthosporium sacchari infects certain clones of sugar cane and produces a toxin with the same plant selectivity as the fungus itself. The toxin was purified by use of activated charcoal plus thin layer, gel, and ion exchange chromatography. Gas chromatography (GC) of a trimethylsilyl derivative of toxin gave a single peak. Toxin was characterized by GC, mass spectroscopy (MS), and NMR spect...
متن کاملHost Plant Specialization in the Sugarcane Aphid Melanaphis sacchari
Most aphids are highly specialized on one or two related plant species and generalist species often include sympatric populations adapted to different host plants. Our aim was to test the hypothesis of the existence of host specialized lineages of the aphid Melanaphis sacchari in Reunion Island. To this end, we investigated the genetic diversity of the aphid and its association with host plants...
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ژورنال
عنوان ژورنال: Experientia
سال: 1983
ISSN: 0014-4754,1420-9071
DOI: 10.1007/bf01971098