Effect of Rust Infection on Oxidative Phosphorylation of Wheat Leaves

Nature ◽  
1958 ◽  
Vol 182 (4650) ◽  
pp. 1686-1687 ◽  
Author(s):  
B. I. POZSÁR ◽  
Z. KIRÁLY
Keyword(s):  
Oxidative Phosphorylation ◽  
Rust Infection ◽  
Wheat Leaves

Evaluating ten spectral vegetation indices for identifying rust infection in individual wheat leaves

2008 ◽  
Vol 10 (6) ◽  
pp. 459-470 ◽  
Author(s):  
R. Devadas ◽  
D. W. Lamb ◽  
S. Simpfendorfer ◽  
D. Backhouse
Keyword(s):  
Vegetation Indices ◽  
Rust Infection ◽  
Spectral Vegetation Indices ◽  
Wheat Leaves

THE PHYSIOLOGY OF HOST–PARASITE RELATIONS: XI. THE EFFECT OF STEM RUST ON THE PHOSPHATE FRACTIONS IN WHEAT LEAVES

1962 ◽  
Vol 40 (7) ◽  
pp. 975-985 ◽  
Author(s):  
K. L. Mukherjee1 ◽  
Michael Shaw
Keyword(s):  
Nutritional Status ◽  
Oxidative Phosphorylation ◽  
Organic Phosphate ◽  
Puccinia Graminis ◽  
Organic P ◽  
Fresh Weight ◽  
Uncoupling Of Oxidative Phosphorylation ◽  
Wheat Leaves ◽  
Host Parasite ◽  
Total P

Inorganic, organic, and various organic phosphate fractions were determined in uninfected and infected first seedling leaves of Little Club wheat at various stages between 6 to 18 days after incubation with Puccinia graminis tritici Erikss. and Henn. (Race 15B). Inorganic (Pi), organic (Po), and total P per unit fresh weight increased as uninfected leaves aged and the levels of Pi were much more readily altered by changes in nutritional status and environmental conditions than the levels of Po. Infection increased total P and the highest concentrations occurred at the loci of rust pustules. Since the concentration of P was lower in uninfected portions of infected leaves than in comparable parts of uninfected leaves or in rust pustules, it appeared that P was transported into the pustules from uninfected parts of the leaf. Both Pi and Po were increased by infection, but the Pi/Po ratio was lowered. Acid-soluble bound P, easily hydrolyzable P, lipid P, RNA-P, and residual organic P were all increased by infection.When leaf pieces were infiltrated with and then floated on 10−4 M 2,4-dinitrophenol for 24 hours, the levels of all organic phosphate fractions were lowered and Pi was increased, both in uninfected and infected leaves. Dinitrophenol raised the Pi/Po ratio about 30% in uninfected and about 100% in infected leaves.The results militate against the view that the increase in respiration rate caused by infection is due to the uncoupling of oxidative phosphorylation.

scholarly journals Peroxidase isoenzyme patterns of resistant and susceptible wheat leaves following stem rust infection

1989 ◽  
Vol 111 (3) ◽  
pp. 413-421 ◽  
Author(s):  
BERENIKE E. FLOTT ◽  
BRUNO M. MOERSCHBACHER ◽  
HANS-JOACHIM REISENER
Keyword(s):  
Stem Rust ◽  
Peroxidase Isoenzyme ◽  
Rust Infection ◽  
Wheat Leaves ◽  
Isoenzyme Patterns

THE PHYSIOLOGY OF HOST–PARASITE RELATIONS: VIII. EFFECTS OF RUST INFECTION ON ASCORBIC ACID ANDGLUTATHIONE IN WHEAT LEAVES

1961 ◽  
Vol 39 (6) ◽  
pp. 1327-1336 ◽  
Author(s):  
B. I. Sahai ◽  
Michael Shaw
Keyword(s):  
Ascorbic Acid ◽  
Puccinia Graminis ◽  
Oxidized Glutathione ◽  
Redox Potentials ◽  
Rust Infection ◽  
Puccinia Graminis Tritici ◽  
Auxin Content ◽  
Wheat Leaves ◽  
Host Parasite

First seedling leaves of Little Club (susceptible), Khapli I (moderately susceptible), and Khapli (resistant) wheats were inoculated with Puccinia graminis tritici Erikss. and Henn. (Race 15B). Ascorbic (AA) and dehydroascorbic (DHA) acids and glutathione (GSH) were measured at 1–2 day intervals after inoculation until after sporulation. After infection, AA and DHA increased in Little Club and decreased in Khapli. In Khapli the DHA/AA ratio rose sharply 6–8 days after inoculation; in Little Club a similar rise occurred 15–16 days after inoculation. In Khapli I and Little Club, but not in Khapli, GSH increased sharply when sporulation occurred. AA was not detected in uredospores, but DHA was. Oxidized glutathione was not detected in healthy or infected leaves but was present in uredospores. The results are discussed briefly in relation to the changes in auxin content and redox potentials caused by rust infection.

scholarly journals The Effect of Stem Rust Infection on the Soluble Proteins of Wheat Leaves

1966 ◽  
Vol 19 (5) ◽  
pp. 895 ◽  
Author(s):  
CW Wrigley ◽  
HL Webster
Keyword(s):  
Stem Rust ◽  
Electrophoretic Pattern ◽  
Soluble Proteins ◽  
Wheat Varieties ◽  
Disk Electrophoresis ◽  
Rust Infection ◽  
Electrophoretic Patterns ◽  
Wheat Leaf ◽  
Wheat Leaves

The soluble proteins of wheat leaf and of stem rust uredospores were resolved into about 28 and 34 components, respectively, by disk electrophoresis. The funguscontaining and the fungus-free areas of infected wheat leaves were examined. The electrophoretic pattern of an extract of the lesions was markedly different from the pattern of an extract of uninfected leaves. Comparison with the pattern of an extract of uredospores suggested that some of these differences were due to contamination with fungal proteins. For susceptible varieties, extracts of the extralesion areas of infected leaves showed different electrophoretic patterns from extracts of uninfected leaves. This was not so for resistant wheat varieties.

THE PHYSIOLOGY OF HOST–PARASITE RELATIONS: XIV. THE EFFECT OF RUST INFECTION ON THE NUCLEIC ACID CONTENT OF WHEAT LEAVES

1964 ◽  
Vol 42 (11) ◽  
pp. 1531-1540 ◽  
Author(s):  
W. A. Quick ◽  
Michael Shaw
Keyword(s):  
Dry Weight ◽  
Weight Basis ◽  
Nucleic Acid Content ◽  
Fresh Weight ◽  
Fresh Weight Basis ◽  
Rust Infection ◽  
Dna And Rna ◽  
Fungal Dna ◽  
Wheat Leaves ◽  
Host Parasite

The increase in respiration in rust-infected leaves of Little Club wheat was followed and paralleled by an increase in RNA per gram dry weight. The massive increase in dry weight of infected leaves in the later stages of rust development (9–12 days after inoculation) sometimes obscured the increase in RNA when RNA was expressed on a dry weight but not when it was expressed on a fresh weight basis. There was no increase in RNA in rust-infected Khapli. Rust infection had no effect on DNA per gram dry weight in Little Club or Khapli, but DNA per gram fresh weight increased slightly (15%) in Little Club, indicating the synthesis of fungal DNA. Infection had little effect on the protein content of Little Club but markedly lowered that of Khapli. The results are discussed in relation to earlier cytochemical determinations of DNA and RNA in infected tissue.

THE PHYSIOLOGY OF HOST-PARASITE RELATIONS: XVII. ACID-SOLUBLE NUCLEOTIDES IN RUST-INFECTED AND SENESCING WHEAT LEAVES

1966 ◽  
Vol 44 (6) ◽  
pp. 777-788 ◽  
Author(s):  
W. A. Quick ◽  
Michael Shaw
Keyword(s):  
Rust Infection ◽  
Free Nucleotide ◽  
Rna Content ◽  
Adenosine Derivatives ◽  
Wheat Leaves ◽  
Nucleotide Ratio ◽  
Host Parasite

Acid-soluble nucleotides in senescing wheat leaves tended to decrease with time in a manner similar to the decline in RNA.2 Little change was apparent in the free nucleotide: RNA nucleotide ratio. Treatment with kinetin reduced, but did not prevent the loss of soluble nucleotides. The greatest losses occurred in the nucleoside diphosphates. Rust infection increased each of the soluble nucleotides even more rapidly than it increased RNA content. Rust uredospores, themselves, appeared to possess a large soluble nucleotide pool. Uridine and adenosine derivatives were the only nucleotides consistently found. Uredospores and rust-infected leaves differed from uninfected leaves in possessing a large amount of a UDP-N-acetylglucosamine complex. The results are discussed in relation to previous measurements of RNA in senescing and rust-infected leaves.

THE NATURE OF STARCH ACCUMULATION AT THE RUST INFECTION SITE IN LEAVES OF PINTO BEAN PLANTS

1961 ◽  
Vol 39 (7) ◽  
pp. 1595-1604 ◽  
Author(s):  
Dalton Wang
Keyword(s):  
De Novo ◽  
Host Tissue ◽  
Starch Accumulation ◽  
Infected Leaf ◽  
Infection Site ◽  
De Novo Synthesis ◽  
Rust Infection ◽  
Carbon 14 ◽  
Wheat Leaves ◽  
Green Island

The accumulation of radioactivity from carbon-14 dioxide assimilation at infection sites of Uromyces phaseoli was studied. The accumulated radioactivity was found to reside essentially in starch, which has been clearly demonstrated in this study to be the result of de novo synthesis from carbon-14 dioxide at the infection site and not due to an enhanced translocation of photosynthates from non-infected leaf areas and subsequent starch synthesis.It was also shown that U. phaseoli induced an increase in the chlorophyll content of the host tissue located at the periphery of the rust colony as it developed, and a concomitant increase in starch accumulation.Unlike the ‘green island' induced by powdery mildew in wheat leaves reported by Allen, the 'green island' induced by U. phaseoli in bean leaves is the result of pigment retention in the host tissue within the domain of influence of the parasite. The chlorophyll in the 'green island' was found to be photosynthetically active. Results from experiments of photosynthesis with 'green islands' provided the unequivocal evidence to support the idea of de novo synthesis of starch at the sites of rust infection.

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