| 诱抗剂对马铃薯疮痂病抗性诱导的生理机制 |
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| 引用本文： | 杨鑫,李丽淑,樊吴静,何虎翼,唐洲萍,谭冠宁.诱抗剂对马铃薯疮痂病抗性诱导的生理机制[J].南方农业学报,2018,49(6):1111-1117. |
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| 作者姓名： | 杨鑫 李丽淑 樊吴静 何虎翼 唐洲萍 谭冠宁 |
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| 作者单位： | 广西农业科学院 经济作物研究所,南宁,530007 |
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| 摘 要： | 目的]探讨不同诱抗剂对马铃薯疮痂病抗性诱导的影响及其抗性生理机制,为马铃薯疮痂病的生物防治提供参考依据.方法]以叶片喷施清水为对照(CK),设6个诱抗剂处理,处理1~处理4为常规拌种分别+1.0 mmol/L水杨酸、1.0 mmol/L苯并噻二唑、2000倍25%吡唑醚菌酯或500倍3%氨基寡糖素喷施叶片,处理5和处理6为50倍3%氨基寡糖素喷种分别+500倍3%氨基寡糖素或500倍3%香菇多糖喷施叶片.于齐苗后每隔7 d喷施1次,共喷施3次,第3次喷施后14 d调查植株出苗率、株高等农艺性状,取样测定抗性生理指标,收获后调查块茎疮痂病发病率、产量并进行品质分析.结果]不同诱抗剂处理均可显著降低马铃薯疮痂病发病率,其中以50倍3%氨基寡糖素喷种+500倍3%香菇多糖喷施叶片的防治效果最佳,相对防效达68.85%;与CK相比,诱抗剂处理后的叶片叶绿素、可溶性糖和可溶性蛋白含量上升,超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性增强,丙二醛(MDA)含量降低,块茎的可溶性蛋白、维生素C和淀粉含量显著提高(P<0.05).结论]诱抗剂通过提高马铃薯叶片的叶绿素和渗透调节物质含量,增强抗氧化酶活性及降低细胞膜脂质过氧化来调节植株生长,从而诱导植株产生系统抗病性.利用50倍3%氨基寡糖素喷种+500倍3%香菇多糖喷施叶片对防治马铃薯疮痂病的效果最理想,同时可提高产量并改善块茎营养品质.
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| 关 键 词： | 马铃薯 疮痂病 诱抗剂 抗性诱导 |
Physiological mechanism of inducers to resistance inducing of potato scab |
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| YANG Xin,LI Li-shu,FAN Wu-jing,HE Hu-yi,TANG Zhou-ping,TAN Guan-ning.Physiological mechanism of inducers to resistance inducing of potato scab[J].Journal of Southern Agriculture,2018,49(6):1111-1117. |
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| Authors: | YANG Xin LI Li-shu FAN Wu-jing HE Hu-yi TANG Zhou-ping TAN Guan-ning |
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| Abstract: | Objective]The effects of different inducers on inducing resistance of potato scab and resistant physiologi-cal mechanism were explored to provide reference for biological control methods of the potato scab.Method]Six diffe-rent treatments were conducted,while spraying clear water on leaves was as control(CK). Treatment 1-treatment 4 were seed dressing+1.0 mmol/L salicylic acid foliage spraying,seed dressing+1.0 mmol/L benzothiodiazole foliage spraying, seed dressing+2000 times 25% pyraclostrobin foliage spraying and seed dressing+500 times 3% amino oligosaccharide foliage spraying. Treatment 5 and treatment 6 were 50 times 3% amino oligosaccharide seed spraying+500 times 3% amino oligosaccharide foliage spraying and 50 times 3% amino oligosaccharide seed spraying+500 times 3% mushrooms poly-saccharide foliage spraying. Spraying once every 7 d and three times in total. After 14 d of the third spraying,the germi-nating rate,plant height and other agronomic characters were investigated,and the physiological indexes of resistance were measured. After the harvest,the incidence and yield of tuber scab were studied and quality analysis was conducted.Result]The treatment of different inducers could all significantly reduce the incidence of potato scab,and 50 times 3% amino-oligosaccharide(AO)seed dressing and 500 times 3% lentinan(LNT)foliage spraying had the best control efficien-cy(68.85%). Treatment of inducers could increase leaf chlorophyll,content of soluble sugar and soluble protein,and the activities of superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT),malonaldehyde(MDA)content was re-duced,but soluble protein,vitamin C and starch content of tubers were significantly improved compared with CK(P<0.05).Conclusion]Through increasing content of chlorophyll and osmoregulation substances,inducers can enhance the activity of oxidase system and reduce cellmembranes lipid peroxidation to regulate plant growth,thus inducing plants to produce systemicresistance. The optimal inducers of preventing potato scab is 50 times 3% amino-oligosaccharide seed dressing+500 times 3% lentinan foliage spraying,which can improve the yield and the nutritional quality of tubers. |
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