Pathogenesis in fusarium root rot of primary roots of Pinus resinosa grown in test tubes
Material type:
ArticleLanguage: En Publication details: 1989
In:
Canadian Journal of Plant Pathology v. 11, no. 3, p. 221-228Summary: Light microscopy and transmission electron microscopy were used to document penetration and establishment of infection with Fusarium oxysporum f.sp. pini of primary roots of Pinus resinosa seedlings grown in test tubes. The initial infection sites were in the meristematic region, and hyphae penetrated both inter-and intracellularly through the root cap and epidermis into subjacent tissues. Intracellular penetration was facilitated by an appressorium-like expansion of the hypha before development of the penetration peg. Penetration appeared to be a result of combined enzymatic degradation and mechanical pressure on the host cell wall. Wall appositions and osmiophilic materials, which might be barriers to colonization by this fungus under less optimal environmental conditions, were observed infrequently.
| Item type | Current library | Collection | Status | |
|---|---|---|---|---|
| Article | CIMMYT Knowledge Center: John Woolston Library | Reprints Collection | Available |
Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0706-0661
Light microscopy and transmission electron microscopy were used to document penetration and establishment of infection with Fusarium oxysporum f.sp. pini of primary roots of Pinus resinosa seedlings grown in test tubes. The initial infection sites were in the meristematic region, and hyphae penetrated both inter-and intracellularly through the root cap and epidermis into subjacent tissues. Intracellular penetration was facilitated by an appressorium-like expansion of the hypha before development of the penetration peg. Penetration appeared to be a result of combined enzymatic degradation and mechanical pressure on the host cell wall. Wall appositions and osmiophilic materials, which might be barriers to colonization by this fungus under less optimal environmental conditions, were observed infrequently.
English
Carelia Juarez
Reprints Collection