Association of seed-borne Fusarium species on Pinus ponderosa with germination and seedling viability in Argentina

Autor:	M. I. Salerno, G. A. Lori
Rok vydání:	2007
Předmět:	Fusarium Chlorosis Ecology Fusarium incarnatum Fusarium proliferatum Forestry Biology biology.organism_classification Pinus Horticulture Germination Seedling Botany Fusarium acuminatum
Zdroj:	Forest Pathology. 37:263-271
ISSN:	1439-0329 1437-4781
DOI:	10.1111/j.1439-0329.2007.00505.x
Popis:	Summary Pinus ponderosa seedlots from eight seed orchards in Western Patagonia, Argentina, were evaluated for the presence of Fusarium species, and isolates obtained were subjected to pathogenicity tests. The following species were isolated: Fusariumoxysporum, Fusarium equiseti, Fusarium verticillioides, Fusarium incarnatum, Fusarium acuminatum, Fusarium graminearum and Fusarium proliferatum. With the exception of F. proliferatum and F. graminearum all Fusarium species were recovered from P. ponderosa seedlings with symptoms of damping-off. Five Fusarium species were re-isolated from necrotic roots of seedlings showing chlorosis (F. oxysporum, F. equiseti, F. incarnatum, F. acuminatum and F. verticillioides). High damping-off losses occurred in Fusarium-contaminated seed of P. ponderosa and low disease incidence occurred on less contaminated seed. The role of seed-borne inoculum in disease spread within forest nurseries is discussed.
Databáze:	OpenAIRE
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