Limitation of gaeumannomyces graminis by wheat root responses to phialophora radicicola
J. B. Speakman,B. G. Lewis +1 more
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TLDR
Both varieties of P. radicicola elicited considerable lignification of the stelar components, and lignified and suberization of the inner tangential wall of the endodermis, and prevented Gaeumannomyces graminis var.Abstract:
SUMMARY
Changes in wheat roots invaded by Phialophora radicicola var. graminicola, P. radicicola var. radicicola and Gaeumannomyces graminis var. tritici were explored. Progress of Phialophora radicicola var. graminicola was arrested by lignitubers in the third cortical layer whereas P. radicicola var. radicicola progressed as far as the innermost layer of the cortex, failing to penetrate the endodermis, but was not arrested by detectable structural changes. Both varieties of P. radicicola elicited considerable lignification of the stelar components, and lignification and suberization of the inner tangential wall of the endodermis. When the two species of fungi were inoculated on the same root, P. radicicola var. graminicola prevented Gaeumannomyces graminis var. tritici from spreading longitudinally in the stele.read more
Citations
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Journal ArticleDOI
An ultrastructural study of root invasion in three vascular wilt diseases
C Bishop,Richard M. Cooper +1 more
TL;DR: There were many similarities in invasion by all pathogens of root epidermis and cortex in resistant and susceptible cultivars of tomato infected with Fusarium oxysporum f.
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Significance of ecology in the development of biocontrol agents against soil‐borne plant pathogens
TL;DR: It is argued that antibiosis and some types of mycoparasitism have not been shown to be direct mechanisms of biocontrol in vivo; they might, instead, facilitate competition for substrates or sites as the primary mechanism of control.
Journal ArticleDOI
Natural (non-pathogenic) death of the cortex of wheat and barley seminal roots, as evidenced by nuclear staining with acridine orange
Christine M. Henry,J. W. Deacon +1 more
TL;DR: Nuclear staining with acridine orange was used to assess cell viability in the cortex of wheat and barley seminal roots from glasshouse and field experiments, and results correlated well with nuclear assessments made in unstained or Feulgen-stained roots.
Book ChapterDOI
Metabolism of Noncellulosic Polysaccharides
G. B. Fincher,B. A. Stone +1 more
TL;DR: The cell wall is a polysaccharide-rich, extracellular structure which overlays and encloses the protoplast of higher plant cells and consists of microfibrils embedded in a gel-like matrix.
Book ChapterDOI
Chemistry, Biochemistry, and Function of Suberin and Associated Waxes
P. E. Kolattukudy,K. E. Espelie +1 more
TL;DR: In this article, it has been shown that suberized walls contain an insoluble polymeric material called suberin, which is associated with a complex mixture of nonpolar compounds collectively called waxes.
References
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Book
Pathogenic Root-Infecting Fungi
TL;DR: In this paper, the root-infecting fungi in infected or colonized host tissues have been studied in the context of root-disease control, and the principles of root disease control have been discussed.
Journal ArticleDOI
Lignification in wounded wheat leaves in response to fungi and its possible rôle in resistance
TL;DR: Lignin was synthesized rapidly around wounds in wheat leaves following inoculation with the non-pathogenic fungi Botrytis cinerea and Mycosphaerella pinodes and subsequent fungal growth was limited to the wounds.
Journal ArticleDOI
Chlorogenic and Caffeic Acids as Fungistatic Agents Produced by Potatoes in Response to Inoculation with Helminthosporium carbonium1,2
Journal ArticleDOI
Biological control of the take-all fungus, Gaeumannomyces graminis, by Phialophora radicicola and similar fungi
TL;DR: There is no evidence for ‘Phialophora decline’, at least in well-managed grasslands, but the scale of biological control by this and similar fungi might explain why, in their absence, effective plant resistance to G. graminis is uncommon in the Gramineae.
Journal ArticleDOI
Further studies on Phialophora radicicola and Gaeumannomyces graminis on roots and stem bases of grasses and cereals
TL;DR: British and foreign isolates of the Gaeumannomyces graminis — Phialophora radicicola complex were examined, finding that for most, colony morphology, conidial characteristics, linear growth rate and temperature- and biotin-requirements for vegetative growth varied independently of one another.