Inhibitory effect of exogenous sodium bicarbonate on development and pathogenicity of postharvest disease Penicillium expansum》.pdfVIP

Scientia Horticulturae 187 (2015) 108–114 Contents lists available at ScienceDirect Scientia Horticulturae j o u rn al h o m e p a g e : w w w. elsev /locate/scih orti Inhibitory effect of exogenous sodium bicarbonate on development and pathogenicity of postharvest disease Penicillium expansum Tongfei Lai, Xuelian Bai, Ying Wang, Jiayi Zhou, Nongnong Shi ∗ , Ting Zhou ∗ College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China a r t i c l e i n f o a b s t r a c t Article history: Penicillium expansum, a widespread filamentous fungus, is a major causative agent of fruit decay and may Received 2 December 2014 lead to the production of patulin which causes harmful effects on human health. In this study, P. expansum Received in revised form 5 March 2015 isolated from naturally infected pears (Pyrus bretschneideri Rehd.) was identified by morphological obser- Accepted 6 March 2015 vation and rDNA-internal transcribed spacer analysis. Then, the effects of exogenous sodium bicarbonate Available online 27 March 2015 (NaHCO3 ) on development and pathogenicity of P. expansum were evaluated in vitro and in vivo. Results indicated that NaHCO3 at 0.6% (w/v) significantly (P 0.05) reduced the germination of P. expansum coni- Keywords: dia by up to 80% compared to the control after 10 h incubation. NaHCO3 also showed good ability to inhibit Penicillium expansum Sodium bicarbonate germ tube elongation, mycelia expan