1 材料与方法
1.1 材料
1.2 方法
表1 LAMP引物及其序列Tab. 1 Primer and sequence of LAMP |
| LAMP引物 LAMP primer | 序列(5¢-3¢) Sequence (5¢-3¢) |
|---|---|
| F3 | TCGGAATGACATAAATTGATGA |
| B3 | GGTGTAATATTCTATTGTTTAAGGC |
| FIP | CTTGTTTCGTGTTCTCGGCTTCAGACTGCTCATGCGAA |
| BIP | TATTGAATGCAGCTGTAAAGTGAGCGCTACGTTGTTACATTACGTTTA |
表2 不同检测技术对田间疑似橡胶树红根病病样的检出频率Tab. 2 Detection frequency of suspected rubber tree red root disease in different fields by different detection techniques |
| 序号 Number | 菌株号 Isolate No. | 采集地点 Locality | LAMP 验证 LAMP test | 普通PCR 验证 Normal PCR detection |
|---|---|---|---|---|
| 1 | GP1 | 海南儋州西培农场1 | √ | × |
| 2 | GP2 | 海南儋州西培农场2 | √ | √ |
| 3 | GP3 | 海南儋州西培农场3 | √ | √ |
| 4 | GP4 | 海南儋州西培农场4 | √ | √ |
| 5 | GP5 | 海南儋州西培农场5 | √ | √ |
| 6 | GP6 | 海南儋州西培农场6 | × | √ |
| 7 | GP7 | 海南儋州西流农场红 明队1 | √ | √ |
| 8 | GP8 | 海南儋州西流农场红 明队2 | √ | √ |
| 9 | GP9 | 海南儋州西流农场红 旗队1 | √ | √ |
| 10 | GP10 | 海南儋州西流农场红 旗队2 | √ | × |
| 11 | GP11 | 海南儋州试验场三队 | √ | √ |
| 12 | GP12 | 海南儋州试验场六队1 | √ | √ |
| 13 | GP13 | 海南儋州试验场六队2 | √ | √ |
| 14 | GP14 | 海南白沙龙江农场雄 英二队1 | √ | √ |
| 15 | GP15 | 海南白沙龙江农场雄 英五队3 | × | × |
| 16 | GP16 | 海南白沙龙江农场雄 英五队1 | √ | × |
| 17 | GP17 | 海南白沙龙江农场雄 英七队1 | √ | × |
| 18 | GP18 | 海南白沙龙江农场雄 英二队2 | √ | √ |
| 19 | GP19 | 海南白沙龙江农场雄 英七队2 | √ | √ |
| 20 | GP20 | 海南儋州西流农场红 明队3 | × | √ |
注:√:检出;×:未检出。 | |
Note: √: Detected; ×: Not detected. |
2 结果与分析
2.1 LAMP检测体系的优化
图1 LAMP检测反应温度的优化A:琼脂糖凝胶电泳图;B:SYBR Green I显色图;M:DL2000 DNA Marker;1:空白对照(ddH2O);2:57 ℃;3:58 ℃;4:59 ℃;5:60 ℃;6:61 ℃;7:63 ℃;8:64 ℃;9:65 ℃。 Fig. 1 Optimization of temperature of the LAMP for detection of G. pseudoferreum A: Agarose gel electrophoresis pattern; B: Visual detection of LAMP using SYBR Green I; M: DL2000 DNA Marker; 1: Negative control (dH2O); 2: 57 ℃; 3: 58 ℃; 4: 59 ℃; 5: 60 ℃; 6: 61 ℃; 7: 63 ℃; 8: 64 ℃; 9: 65 ℃. |
图2 LAMP检测反应时间优化A:琼脂糖凝胶电泳图;B:SYBR Green I显色图;M:DL2000 DNA Marker;1:空白对照(ddH2O);2:15 min;3:30 min;4:45 min;5:60 min;6:75 min;7:90 min。 Fig. 2 Optimization reaction time of LAMP for detection of G. pseudoferreum A: Agarose gel electrophoresis pattern; B: Visual detection of LAMP using SYBR Green I. M: DL2000 DNA Marker; 1: Negative control (ddH2O); 2: 15 min; 3: 30 min; 4: 45 min; 5: 60 min; 6: 75 min; 7: 90 min. |
2.2 LAMP特异性检测
图3 LAMP检测的特异性A:琼脂糖凝胶电泳图;B:SYBR Green I显色图;M:DL2000 DNA Marker;1:空白对照(ddH2O);2:橡胶树炭疽病菌RC178;3:橡胶树紫根病菌HC001;4:芒果炭疽病菌MT1;5:柱花草炭疽病菌CH008;6:剑麻斑马纹病菌BM1;7:橡胶树臭根病菌Sr001;8:橡胶树白根病菌RL004;9:橡胶树白粉病菌BF1;10~12:橡胶树褐根病菌Pn008、Pn012、Pn020;13~16:橡胶树红根病菌GP011、GP014、GP021、GP043。 Fig. 3 Specificity of LAMP for G. pseudoferreum A: Agarose gel electrophoresis pattern; B: Visual detection of LAMP using SYBR Green I; M: DL2000 DNA Marker; 1: Negative control (ddH2O); 2: Strain RC178 of C. gloeosporioides; 3: Strain HC001 of H. compactum; 4: Strain MT1 of C. gloeosporioides; 5: Strain CH008 of C. gloeosporioides; 6: Strain BM1 of P. nicotianae; 7: Strain Sr001 of S. repens; 8: Strain RL004 of R. lignosus; 9: Strain BF1 of O. heveae; 10-12: Strains Pn008, Pn012 and Pn020 of P. noxius; 13-16: Strains GP011, GP014, GP021 and GP043 of G. pesudoferreum. |
2.3 LAMP检测的灵敏度
图4 LAMP及普通PCR灵敏度的检测A:LAMP检测的琼脂糖凝胶电泳图;B:SYBR Green I显色图;C:PCR检测结果的琼脂糖凝胶电泳图;M:DL2000 DNA Marker;1:空白对照(ddH2O);2:100 ng/μL;3:10 ng/μL;4:1 ng/μL;5:10-1 ng /μL;6:10-2 ng/μL;7:10-3ng/μL;8:10-4ng/μL;9:10-5ng/μL;10:10-6 ng/μL;11:10-7 ng/μL。 Fig. 4 Specificity of LAMP for detection of G. pseudoferreum A: Agarose gel electrophoresis pattern by LAMP Detection; B: Visual detection of LAMP using SYBR Green I; C: Agarose gel electrophoresis pattern from PCR; M: DL2000 DNA Marker; 1: Negative control (ddH2O); 2: 100 ng/μL; 3: 10 ng/μL; 4: 1 ng/μL; 5: 10-1 ng/μL; 6: 10-2 ng/μL; 7: 10-3 ng/μL; 8: 10-4 ng/μL; 9: 10-5 ng/μL; 10: 10-6 ng/μL; 11: 10-7 ng/μL. |
