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中国农学通报 ›› 2023, Vol. 39 ›› Issue (18): 136-141.doi: 10.11924/j.issn.1000-6850.casb2022-0576

• 植物保护·农药 • 上一篇    下一篇

植物生长调节剂与杀菌剂互作防治棉花枯萎病及增效作用探究

郑德有1,2(), 左东云2, 王巧莲2, 吕丽敏2, 程海亮2, 顾爱星1, 宋国立2()   

  1. 1 新疆农业大学农学院/棉花教育部工程研究中心,乌鲁木齐 830000
    2 中国农业科学院棉花研究所/棉花生物学国家重点实验室,河南安阳 455000
  • 收稿日期:2022-07-11 修回日期:2022-09-07 出版日期:2023-06-25 发布日期:2023-06-25
  • 通讯作者: 宋国立,男,1968年出生,河南西平人,研究员,博士生导师,博士,主要从事棉花遗传育种和棉花生物技术工作。通信地址:455000 河南安阳黄河大道38号 中国农业科学院棉花研究所,E-mail:songguoli@caas.cn
  • 作者简介:

    郑德有,男,1996年出生,山东平邑人,硕士研究生,研究方向:棉花病害防治。通信地址:455000 河南安阳黄河大道38号 中国农业科学院棉花研究所,Tel:1825498509,E-mail:

  • 基金资助:
    国家自然科学基金创新研究群体项目“棉花种质创新和高产分子育种”(31621005); 中国农业科学院科技创新工程(CAAS-ASTIP-CCRI)

Interaction Between Plant Growth Regulator and Fungicide to Control Cotton Fusarium wilt and the Synergy Mechanism

ZHENG Deyou1,2(), ZUO Dongyun2, WANG Qiaolian2, LV Limin2, CHENG Hailiang2, GU Aixing1, SONG Guoli2()   

  1. 1 Engineering Research Centre of Cotton, Ministry of Education/College of Agriculture, Xinjiang Agricultural University, Urumqi 830000
    2 State Key Laboratory of Cotton Biology/Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, Henan 455000
  • Received:2022-07-11 Revised:2022-09-07 Online:2023-06-25 Published:2023-06-25

摘要:

本实验旨在筛选出能有效防治棉花枯萎病的植物生长调节剂与杀菌剂组合,并探究其增效机理,为植物生长调节剂与杀菌剂互作防治棉花枯萎病提供技术指导和理论依据。通过室内毒力测定挑选EC50最小的2种杀菌剂;通过种子活力和分生孢子萌发实验确定植物生长调节剂的最适浓度;两者混用进行室内盆栽试验,测定两者互作的防治效果及增效作用;通过qRT-PCR测定茉莉酸(jasmonic acid,JA)和水杨酸(salicylic acid,SA)途径相关基因在棉花中的表达量。试验结果发现,5种杀菌剂中多菌灵和萎锈灵的EC50最小,对枯萎病菌的毒力最强,EC50分别为13.894 mg/L和29.566 mg/L;综合苄氨基嘌呤和萘乙酸2种植物生长调节剂对种子活力的影响和对枯萎病菌分生孢子萌发的影响,得到其最适防治浓度分别为5 mg/L和50 mg/L。杀菌剂与植物生长调节剂互作防治棉花枯萎病效果最好的为苄氨基嘌呤与多菌灵组合,防效可达80.95%,且具有显著增效作用;qRT-PCR结果显示,JA和SA途径相关基因在药剂处理的棉花中的相对表达显著增加。综上所述,植物生长调节剂与杀菌剂互作中苄氨基嘌呤与多菌灵组合可对棉花枯萎病进行有效防治,其可通过诱导棉花启动自身的JA和SA防御途径增强对棉花枯萎病的防治效果。

关键词: 棉花枯萎病, 植物生长调节剂, 杀菌剂, 互作, 机理

Abstract:

We designed this study to explore the combination of plant growth regulator and fungicide, which could benefit the cotton resistance to Fusarium wilt. Moreover, the synergy mechanism of the combination was investigated, to provide insights into enhancing cotton resistance to Fusarium wilt. Through indoor toxicity test, two fungicides with the minimum EC50 were selected. The most suitable plant growth regulators were also identified by seed vigor testing and conidial germination statistic of Fusarium wilt. The combination of fungicide and plant growth regulator was applied during the plant growth in greenhouse to evaluate the synergy effect. To explore the mechanism underlying the combination of fungicide and plant growth regulator, we detected the expression levels of genes involving in jasmonic acid-related and salicylic acid-related pathways by qRT-PCR. The results of fungicide selection showed that carbendazim and carboxin had the minimum EC50 and the strongest virulence to Fusarium wilt, the EC50 was 13.894 mg/L and 29.566 mg/L, respectively. Plant growth regulator selection indicated that the optimal concentration 6-Benzylaminopurine and naphthylacetic acid was 5 mg/L and 50 mg/L, respectively. Finally, the most suitable combination was 6-Benzylaminopurine-carbendazim, which had the control effect of 80.95% and significant synergy effect. The results of qRT-PCR also showed that genes in jasmonic acid-related and salicylic acid-related pathways had significantly higher expression levels in the treated group than those in blank control group. In conclusion, the 6-Benzylaminopurine-carbendazim combination could enhance the cotton resistance to Fusarium wilt by activating transcription of genes in jasmonic acid-related and salicylic acid-related pathways.

Key words: cotton Fusarium wilt, plant growth regulator, fungicide, interaction, mechanism