KNAW Repository

Relationships between Fusarium population structure, soil nutrient status and disease incidence in field-grown asparagus

Yergeau, E. and Sommerville, D.W. and Maheux, E. and Vujanovic, V. and Hamel, C. and Whalen, J.K. and St-Arnaud, M. (2006) Relationships between Fusarium population structure, soil nutrient status and disease incidence in field-grown asparagus. FEMS Microbiology Ecology, 58, 394-403. ISSN 0168-6496.

[img]PDF - Published Version
Restricted to KNAW only

182Kb

Official URL: http://dx.doi.org/10.1111/j.1574-6941.2006.00161.x

Abstract

Fusarium species cause important diseases in many crops. Lack of knowledge on how Fusarium species and strains interact with their environment hampers growth management strategies to control root diseases. A field experiment involving asparagus as host plant and three phosphorus fertilization levels was designed to examine the seasonal changes and ecological relationships between Fusarium populations and their soil and plant environments. Fusarium taxa were identified and assessed using PCR-denaturing gradient electrophoresis of the EF1-a gene. Resulting profiles were analyzed with respect to 17 ecological parameters measured during the three main asparagus phenological phases across a growing season. Multivariate statistical analysis showed that Fusarium population structure was strongly influenced by soil P level while seasonal variation was less important. A significant relationship between Fusarium population composition and Fusarium crown and root rot incidence was also found in September. Canonical analysis further revealed significant relationships between Fusarium population structure, and plant manganese and iron contents, soil dehydrogenase activity and soil calcium concentration. If higher Fusarium crown and root rot incidence is related to the Fusarium community structure, strategies to reduce the incidence in asparagus plantations may be found through manipulation of the soil fertility [KEYWORDS: Fusarium ; asparagus ; PCR-denaturing gradient electrophoresis ; fertilization ; phosphorus ; Fusarium crown and root rot]

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:11884
Deposited On:15 Nov 2011 01:00
Last Modified:24 Apr 2012 16:31

Repository Staff Only: item control page