Acibenzolar-S-methyl induces the accumulation of defense-related enzymes in apple and protects from fire blight

被引:133
作者
Brisset, MN
Cesbron, S
Thomson, SV
Paulin, JP
机构
[1] INRA, Ctr Angers, Unite Ameliorat Especes Fruitieres & Ornementales, F-49071 Beaucouze, France
[2] INRA, Ctr Angers, Unite Pathol Vegetale & Phytobacteriol, F-49071 Beaucouze, France
[3] Utah State Univ, Dept Biol, Logan, UT 84322 USA
关键词
chemical control; Erwinia amylovora; beta-1,3-glucanases; peroxidases; systemic resistance; CGA; 245704;
D O I
10.1023/A:1008728119087
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Acibenzolar-S-methyl (Novartis) is a chemical inducer of systemic acquired resistance in several annual plants. The ability of this novel chemical to induce resistance was studied in a perennial plant (apple) affected by fire blight caused by Erwinia amylovora. Acibenzolar-S-methyl (100 and 200 mg/l active ingredient) protected Golden Delicious seedlings, scions and trees from artificial infection when applied before inoculation. The protection of apple seedlings was similar to the protection obtained with the standard for fire blight control, plantomycin (100 mg/l streptomycin sulfate), applied immediately before inoculation. The mean levels of control in scions in the greenhouse and in trees in orchards were approximately 69% and 50%, respectively. The protection of apple seedlings was constantly associated with the activation of two families of defense-related enzymes, peroxidases and beta-1,3-glucanases. Accumulation of both enzymes was induced locally in treated leaves and systemically, especially for beta-1,3-glucanases, in upper untreated leaves, and was sustained for at least 17 days. These results suggest that acibenzolar-S-methyl promotes induced systemic resistance in apple by increasing defense-related compounds. This chemical could provide a new approach of control of fire blight but its practical use needs further investigation.
引用
收藏
页码:529 / 536
页数:8
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