Document Detail

Nitrogen fertilization of the host plant influences production and pathogenicity of Botrytis cinerea secondary inoculum.
MedLine Citation:
PMID:  23151188     Owner:  NLM     Status:  Publisher    
The influence of nitrogen (N) nutrition on a plant's susceptibility to Botrytis and other pathogens is well documented However, little is known of possible effects on sporulation of the pathogen on diseased tissue and on the pathogenicity of resulting secondary inoculum. To address this question, sporulation by two strains of Botrytis cinerea was quantified on tomato plants produced under different N irrigation regimes with inputs of nitrate varying from 0.5 to 45 mmol.L(-1) (mM). Sporulation decreased significantly (P<0.05) with increasing nitrate fertilization up to 15-30 mM. The secondary inoculum was collected and used to inoculate pruning wounds on tomato plants produced under a standard fertilization regime. Pathogenicity of the spores was significantly influenced by the nutritional status of their production substrate. Disease severity was highest with spores produced on plants with very low or very high N fertilization (0.5 or 30 mM nitrate). It was lowest for inoculum from plants with moderate levels of N fertilization. These results suggest that it may be possible to find an optimum level of nitrogen fertilization to reduce the production of secondary inoculum and its pathogenicity to tomato.
Manzoor Ali Abro; François Lecompte; Florian Bryone; Philippe Nicot
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-14
Journal Detail:
Title:  Phytopathology     Volume:  -     ISSN:  0031-949X     ISO Abbreviation:  Phytopathology     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9427222     Medline TA:  Phytopathology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
INRA, Unité de Pathologie végétale, Montfavet, France;
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