Histopathology of Fusiform Rust-Inoculated Progeny from (Shortleaf × Slash) × Shortleaf Pine Crosses

Jewell, F. F.

doi:10.1094/phyto-78-396

Cited by 11 publications

(22 citation statements)

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“…Other symptomatic samples exhibited mesophyll with fewer but more filamentous intra-and intercellular hyphae (Fig. 11), which was more consistent with previous reports (JEWELL 1983;PETERSON and WALLA 1978;VERRALL 1934). Hyphae were limited to tissues external to the endodermis and within the lesion boundaries.…”

Section: Symptomatic Tissuesupporting

confidence: 91%

“…These results are, in general, consistent with the effects of A/. t/e^?73C55« on longleaf pine (JEWELL 1983). Other needle-inhabiting fungi were observed to effect all tissues of their hosts (MITCHELL et al 1978;PETERSON and WALLA 1978;WILLIAMSON etal.…”

Section: Discussionsupporting

confidence: 78%

“…Lateral extension of hyphae from the lesion appeared to be effectively prevented by the interface. The abundant hyphal presence directly contrasts with the M. deamessii/\on'^tz\ pine relationship where, other than under stromata, hyphae in the symptom lesion were absent, difficult to observe, or were rare (JEWELL 1983;VERRALL 1934). Hyphae of other needle-inhabiting fungi/pine associations apparently have not been obser\^ed in the abundance noted with P. hedgcockii on longleaf pine (MITCHELL et al 1978;PETERSON and WALLA 1978;WILLIAMSON et al 1976).…”

Section: Discussionmentioning

confidence: 93%

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Histopathology of longleaf pine needles infected by Ploioderma hedgcockii (Dearn.) Darker

Jewell

1990

European Journal of Forest Pathology

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The histopathology of Ploioderma hedgcockii on longleaf pine needles was examined. Abnormal host tissue was confined to the visible lesion and to tissues external to the endodermis where collapse ot niesophyll cells was the predominant abnormality. Resin ducts exhibited necrosis and dissolution of epithelial cells. 1 Hypnae, intra-and intercellular, were frequent to profuse in intercellular spaces resulting from mesophyll cell collapse. Hyphae were external to the endodermis and appeared limited to the symptomatic tissue by an intercellular matrix at the lesion boundaries. Hysterotheca were subepidermal and appeared seated on the hypodermis. Asci appeared to contain four "two-stage" ascospores. The presence of a toxin was not indicated in the host/ pathogen relationship.

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Section: Symptomatic Tissuesupporting

confidence: 91%

Section: Discussionsupporting

confidence: 78%

Section: Discussionmentioning

confidence: 93%

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Histopathology of longleaf pine needles infected by Ploioderma hedgcockii (Dearn.) Darker

Jewell

1990

European Journal of Forest Pathology

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“…) After the formation of the cicatrix, a new cambium appears beneath (away from) the wound/ pathogen (Biggs, 1985;Cunningham, 1928;Mullick, 1975;Pearce and Rutherford, 1981;Woodward and Pearce, 1988a). The position of this cambium is presumably under hormonal control and ultimately it restores the continuity of phellem and phelloderm, thus usually (but not always) walling off the wound or pathogen (Biggs, 1987;Bostock and Middleton, 1987;Cunningham, 1928;Jewell, 1988;Pearce and Rutherford, 1981;Woodward and Pearce, 1988a). Mullick termed this cambium the "necrophylactic periderm" (Mullick, 1975(Mullick, , 1977.…”

Section: Cooperative Barrier Zonesmentioning

confidence: 99%

“…Necrophylactic periderms and, perhaps, cicatrices would then be relegated to roles in wound healing (Mullick, 1977). In this context, more aggressive pathogens are known which appear to repeatedly penetrate induced cicatrices and NITs (Biggs, 1987;Jewell, 1988).…”

Section: Cooperative Barrier Zonesmentioning

confidence: 99%