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中国生物防治学报 ›› 2016, Vol. 32 ›› Issue (4): 531-538.DOI: 10.16409/j.cnki.2095-039x.2016.04.016

• 研究论文 • 上一篇    下一篇

链霉菌组合ST?2发酵条件优化及对黄瓜枯萎病的防治效果

闫建芳1,2, 赵柏霞3, 刘秋2, 于基成2, 齐小辉2, 刘长建2, 刘志恒1   

  1. 1. 沈阳农业大学植物保护学院, 沈阳 110161;
    2. 大连民族大学生命科学学院, 大连 116600;
    3. 大连市农业科学研究院, 大连 116036
  • 收稿日期:2016-01-07 出版日期:2016-08-08 发布日期:2016-07-29
  • 通讯作者: 刘秋, 刘志恒
  • 作者简介:闫建芳(1980?),男,工程师,E-mail:jianfangy2003@126.com
  • 基金资助:
    国家自然科学基金(31070005,21276047,31270057);中央高校基本科研业务(DC13010309,DC201501020201,DC201502020403,DC201501085);NSFC-NRF国际合作项目(31311140255)

Optimization of Streptomyces Combination ST?2 Fermentation Conditions and Control Effect on Cucumber Fusarium Wilt

YAN Jianfang1,2, ZHAO Baixia3, LIU Qiu2, YU Jicheng2, QI Xiaohui2, LIU Changjian2, LIU Zhiheng1   

  1. 1. College of Plant Protection, Shenyang Agricultural University, Shenyang 110161, China;
    2. College of Life Science, Dalian Nationalities University, Dalian 116600, China;
    3. Dalian Academy of Agriculture Sciences, Dalian 116036, China
  • Received:2016-01-07 Online:2016-08-08 Published:2016-07-29

摘要: 为实现黄瓜枯萎病的生物防治,本研究对海洋拮抗放线菌组合Streptomyces spp. ST?2(包含菌株GQ?17、YH?91、YH?23)的发酵培养基配方及发酵条件进行了探讨,期望提高其生防效果和植株生长量。采用皿内共培养法、牛津杯法分别测定了3株生防链霉菌的共生性及单菌株抗菌活性;通过单因素试验和正交试验确定了ST?2组合最佳发酵培养基配方和最佳发酵条件;通过盆栽试验研究了ST?2组合菌剂对黄瓜植株的促生防病效果。菌株GQ?17、YH?91和YH?23的无菌发酵液对黄瓜枯萎病菌Fusarisum oxysporum f. sp. cucumebrium抑菌圈直径分别为24.2、20.4和14.4 mm,且3株菌间无生长抑制,可共生;组合菌剂ST?2的最佳发酵培养基配方为:玉米粉8 g/L、黄豆粉10 g/L、氯化钠2.5 g/L、碳酸钙2.0 g/L,pH自然;当菌株GQ?17、YH?91和YH?23种子液以3:3:2配比,以3%接种量接入50 mL液体培养基中,31 ℃、150 r/min振荡培养5 d,其发酵液对黄瓜枯萎病具有最好的防治效果,相对防效达65.89%,且显著高于单菌株(19.94%,25.20%,42.88%)及申嗪霉素(39.50%)的效果。此外,ST?2组合菌剂施用后,处理植株株高(42.30 cm)和茎粗(6.84 mm)较对照(株高32.60 cm,茎粗6.07 mm)分别增加29.75%和12.69%,显著提升了植株生物量。

关键词: 协同增效, 组合, 发酵优化, 黄瓜枯萎病

Abstract: To achieve higher effect of bio-control on cucumber Fusarium wilt, as well as promote the growth of cucumber, the fermentation media and conditions of the marine antagonism combination ST-2 which contains strains of GQ-17, YH-91 and YH-23 were studied. The synergistic interaction and antimicrobial activity of the three bio-control strains were determined by co-culture and Oxford cup methods in dish, respectively. The best fermentation medium and the optimal inoculation condition were determined by single-factor experiment and orthogonal experiment respectively, and the bio-control effects of ST-2 against cucumber Fusarium wilt were detected by pot experiment. Strains GQ-17, YH-91 and YH-23 were symbiotic and had no inhibition with each other. Inhibition zone of their fermented liquid against Fusarisum oxysporum f. sp. cucumebrium were 24.2, 20.4 and 14.4 mm, respectively. The best fermentation medium for ST-2 was screened out, which contains ingredients as follows: corn flour 8 g/L, soybean meal 10 g/L, sodium chloride 2.5 g/L, calcium carbonate 2.0 g/L, and nature pH. The fermented broth has the highest inhibition activity on cucumber wilt when the combination ratio of GQ-17, YH-91 and YH-23 was 3:3:2 (V/V), and the inoculation ratio was 3%, into 50 mL liquid medium in 250 mL triangular flask, shaking at 31 ℃ for 5 d with 150 r/min. The relative control effect was 65.89%, which was higher than the effect of single strain (19.94%, 25.20%, and 42.88%) and shenqinmycin (39.50%). In addition, the increments of stem length (9.70 cm) and diameter of plant (0.77 mm) were significant increased by 29.75% and 12.69%, respectively.

Key words: synergistic interaction, combination, fermentation condition optimizing, cucumber Fusarium wilt

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