| 引用本文: | 赵文宗, 郑旭阳, 张映卿, 钟 川, 阳燕娟, 于文进.两种砧木对樱桃番茄青枯病抗性及根际微生物数量的影响[J].广西植物,2019,39(10):1307-1316.[点击复制] |
| ZHAO Wenzong, ZHENG Xuyang, ZHANG Yingqing, ZHONG Chuan,
YANG Yanjuan, YU Wenjin.Effects of two rootstocks on bacterial wilt resistance and rhizospheric microorganisms of cherry tomato[J].Guihaia,2019,39(10):1307-1316.[点击复制] |
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| 摘要: |
| 青枯病是危害我国华南地区番茄生产最严重的土传性病害之一。为探讨在人工接种青枯菌条件下,两种不同砧木嫁接对番茄青枯病的抗性及根际微生物数量的影响。该研究分别用砧木“番砧1号”和“茄砧21号”与樱桃番茄“粉贝贝”进行嫁接,采用稀释平板法对各嫁接组合的根际微生物进行分离。结果表明:(1)采用抗病砧木嫁接显著提高了番茄的抗病性,降低了发病率和病情指数,延缓了发病时间。(2)青枯菌在侵染植株过程中呈现动态变化,其数量从根系到地上茎部逐渐减少; 砧穗嫁接植株、砧木自根嫁接植株根际基质和根系中的青枯菌数量降低,且地上茎部中的病原菌数量显著低于接穗自根嫁接植株; 接种青枯菌后,各嫁接组合根际基质中的细菌、真菌和放线菌的数量随发病期的变化呈先增加后降低的趋势。(3)采用抗病砧木嫁接总体上提高了植株根际微生物总量、细菌及放线菌的数量,降低了真菌的数量,改善了嫁接植株根际微环境,对降低番茄青枯病发病率具有重要作用。 |
| 关键词: 番茄, 嫁接, 青枯病, 抗病性, 根际微生物 |
| DOI：10.11931/guihaia.gxzw201812009 |
| 分类号:Q945 |
| 文章编号:1000-3142(2019)10-1307-10 |
| 基金项目:国家自然科学基金(31660568); 广西创新驱动发展专项项目(科技重大专项)(桂科AA17204039-2,AA17204026-1)[Supported by the National Natural Science Foundation of China(31660568); Guangxi Innovation-Driven Development Program(Major Science and Technology Program)(AA17204039-2, AA17204026-1)]。 |
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| Effects of two rootstocks on bacterial wilt resistance and rhizospheric microorganisms of cherry tomato |
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ZHAO Wenzong, ZHENG Xuyang, ZHANG Yingqing, ZHONG Chuan,
YANG Yanjuan, YU Wenjin*
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College of Agriculture, Guangxi University, Nanning 530004, China
College of Agriculture, Guangxi University, Nanning 530004, China
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| Abstract: |
| Bacterial wilt is one of the most serious soil-borne diseases endangering tomato production in South China. Under the condition of phytotron inoculation of Ralstonia solanacearum, the effects of two different rootstocks on the resistance to bacterial wilt and the quanantity of rhizospheric microorganisms were studied. “Fanzhen No.1”, “Qiezhen No. 21” and cherry tomato variety “Fen beibei” were used as rootstocks and scion, respectively. And the rhizospheric microorganisms were separated by dilution plate method. The results were as follows:(1)Grafting significantly improved the resistance of tomato to bacterial wilt, reduced the incidence rate and disease index, and delayed the onset of disease.(2)The quantity of R. solanacearum decreased gradually from root to shoot and showed dynamic changes du-ring the infection process. Grafting with disease-resistant rootstocks significantly reduced the quantity of R. solanacearum in rhizospheric matrix and roots, and the quantity of pathogenic bacteria in shoot was significantly lower than that of scion-self-rooted grafted plants. After inoculation, the quantities of bacteria, fungi and actinomycetes in rhizospheric matrix of all grafted combinations increased first and then decreased as the disease progressed.(3)In general, grafting with disease-resistant rootstocks increased the quantities of rhizospheric microorganisms, bacteria and actinomycetes while decreased the quantity of fungi, and improved the rhizospheric microenvironment, which plays an important role in redu-cing the incidence rate of tomato bacterial wilt. |
| Key words: tomato, grafting, bacterial wilt, disease resistance, rhizospheric microorganisms |
