| Postharvest Treatment with β-Aminobutyric Acid Induces Resistance Against Dry Rot Caused by Fusarium sulphureum in Potato Tuber |
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| 作者单位： | [1]College of Food Seience and Engineering, Gansu Agricultural University, Lanzhou 730070, P.R. China [2]Gansu Key Lab of Crop Improvement ＆ Germplasm Enhancement, Lanzhou 730070, P.R.China |
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| 基金项目： | Acknowledgements This research was supported by the Gansu Agricultural Bio-Technology Foundation, China （GNSW-2005-08） and the R＆D Special Funds for Public Welfare Industry （Agriculture） of Ministry of Agriculture of China （NYHYZX07-6）. |
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| 摘 要： | The effectiveness ofpostharvest β-aminobutyric acid （BABA） treatment was studied for inducing resistance against dry rot caused by Fusarium sulphureum in tubers and slices of two potato cultivars （resistant cultivar Shepody and susceptible cultivar Xindaping）. The results showed that BABA at 100 mmol L-1 significantly reduced lesion diameter in inoculated both tubers and slices. The chemical at 100 mmol L-1 showed an effective reduction in infection ability ofF. sulphureum inoculated 48 and 72 h after treatment in slices of resistant cultivar, and 72 and 96 h in susceptible ones. BABA increased the activitives of peroxidase （POD）, polyphenoloxidase （PPO） and phenylalanine ammonialyase （PAL）, and accumulated the contents of lignin, flavonoids and phenolics in slices. The resistant cultivar had a stronger resistant response than the susceptible one. These findings suggest that the BABA treatment can induce the resistance in potato tubers, however, the inducing degree depends on the original level of resistance present in each cultivar.
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| 关 键 词： | 马铃薯块茎 诱导抗性 氨基丁酸 镰刀菌 干腐病 采后处理 过氧化物酶 多酚氧化酶 |
| 收稿时间： | 15 March 2010 |
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