کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4519047 1322814 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biological control agents and chemical inducers of resistance for postharvest control of Penicillium expansum Link. on apple fruit
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
Biological control agents and chemical inducers of resistance for postharvest control of Penicillium expansum Link. on apple fruit
چکیده انگلیسی

Penicillium expansum Link. is the causal agent of apple blue mold, and it can cause severe loss of stored fruit. The use of fungicides is still the major means for postharvest control of this disease. In the present study, we investigated the effectiveness of biological control agents (BCAs) and/or induction of resistance for postharvest control of blue mold on apple (Malus domestica L. cv Golden Delicious). The BCAs and chemical inducers of resistance tested had direct effects against P. expansum, significantly reducing the percentages of infection and/or lesion sizes when applied directly against this pathogen. The antifungal activities of acibenzolar-S-methyl, β-aminobutyric acid and methyl jasmonate were also confirmed in vitro against P. expansum and Trichoderma atroviride P1. Treatments with BCAs and chemical inducers of resistance did not control infection on the untreated wounds that were made 1 cm from the original treated wounds. However, reverse-transcription PCR showed that treatments with Pseudomonas syringae pv. syringae 1,3S and acibenzolar-S-methyl induced significant increases in the levels of gene transcripts of the pathogenesis-related proteins PR-1a, PR-2, PR-5 and PR-8 in apple peel, as compared to controls. Moreover, immunoblotting showed an accumulation of PR-2 and PR-5 proteins in treated samples. These data indicate that these treatments trigger resistance responses in the apple fruit, although these responses do not limit the infection. Thus, biological control is confirmed as one of the most promising alternatives for postharvest control of blue mold on apple, while the induction of resistance does not appear to be a useful approach here.

Research highlights▶ Biocontrol agents and chemical inducers control apple blue mold. ▶ They act directly against Penicillium expansum, exterting an antimicrobial activity. ▶ Moreover, they induce pathogenesis-related proteins accumulation in apple fruits. ▶ Induced resistance responses appear ineffective against the pathogen. ▶ The reduction of infection seems attributable only to the antimicrobial activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Postharvest Biology and Technology - Volume 59, Issue 3, March 2011, Pages 307–315
نویسندگان
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