Abstract:
:A biofilm-forming strain of Pichia fermentans proved to be most effective in controlling brown rot on apple fruit when coinoculated into artificial wounds with a phytopathogenic isolate of Monilinia fructicola. Culture filtrates and autoclaved cells had no significant influence on the disease. When sprayed onto the apple fruit surface, this yeast formed a thin biofilm but failed to colonize the underlying tissues. When inoculated into wounds artificially inflicted to peach fruit or when sprayed onto the surface of peach fruit, the same strain showed an unexpected pathogenic behaviour, causing rapid decay of fruit tissues even in the absence of M. fructicola. Both optical and scanning electron microscopy were used to evaluate the pattern of fruit tissue colonization by P. fermentans. While on apple surface and within the apple wound the antagonist retained its yeast-like shape, colonization of peach fruit tissue was always characterized by a transition from budding growth to pseudohyphal growth. These results suggest that pseudohyphal growth plays a major role in governing the potential pathogenicity of P. fermentans, further emphasizing the importance of a thorough risk assessment for the safe use of any novel biocontrol agent.
journal_name
FEMS Yeast Resjournal_title
FEMS yeast researchauthors
Giobbe S,Marceddu S,Scherm B,Zara G,Mazzarello VL,Budroni M,Migheli Qdoi
10.1111/j.1567-1364.2007.00301.xsubject
Has Abstractpub_date
2007-12-01 00:00:00pages
1389-98issue
8eissn
1567-1356issn
1567-1364pii
FYR301journal_volume
7pub_type
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journal_title:FEMS yeast research
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pub_type: 杂志文章
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更新日期:2019-03-01 00:00:00
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