期刊
POSTHARVEST BIOLOGY AND TECHNOLOGY
卷 85, 期 -, 页码 196-202出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.postharvbio.2013.06.014
关键词
Rhodosporidium paludigenum; Penicillium digitatum; Citrus fruit; Induced resistance; Postharvest biological control
资金
- National Natural Science Foundation of China [31271962]
- Foundation for the Author of National Excellent Doctoral Dissertation of PR China [201061]
- Ph.D. Programs Foundation of Ministry of Education of China [20100101110087]
- National Public Benefit (Agricultural) Research Foundation of China [200903044]
- Program for Key Innovative Research Team of Zhejiang Province [2009R50036]
Induced disease resistance against plant pathogens is a promising non-fungicidal decay control strategy. In this study, a potential biocontrol yeast, Rhodosporidium paludigenum, was investigated for its induction of disease resistance against Penicillium digitatum in citrus fruit. The results showed that R. paludigenum is the most effective yeast among three selected yeasts in stimulating the resistance of citrus fruit to green mold. When R. paludigenum was applied 48-72 h before inoculation with P. digitatum, disease incidence and disease severity in citrus fruit significantly decreased. Application of R. paludigenum at concentrations of 1 x 10(8) and 1 x 10 cells mL(-1) respectively resulted in 49.6% and 52.5% reductions in the percentage of infections. Induction of resistance to P. digitatum by R. paludigenum treatment significantly enhanced the activities of defense-related enzymes, including beta-1,3-glucanase, phenylalanine ammonia-lyase, peroxidase, and polyphenoloxidase, which may be an important mechanism by which the biocontrol yeast reduces the fungal disease of citrus fruit caused by P. digitatum. (c) 2013 Elsevier B.V. All rights reserved.
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