生物技术通报 ›› 2024, Vol. 40 ›› Issue (9): 249-259.doi: 10.13560/j.cnki.biotech.bull.1985.2024-0253

• 研究报告 • 上一篇    下一篇

多粘类芽胞杆菌新菌株X-11及其对番茄和水稻的促生效应

刘文志1,2(), 贺丹3, 李鹏3, 傅应林1,2, 张译心1,2, 温华杰1,2, 于文清1,2,3()   

  1. 1.上饶师范学院生命科学学院,上饶 334001
    2.上饶师范学院生态环境与绿色发展研究中心 赣东北特色植物资源保育与生态修复重点实验室,上饶 334001
    3.黑龙江省农垦科学院,哈尔滨 150038
  • 收稿日期:2024-03-16 出版日期:2024-09-26 发布日期:2024-08-01
  • 通讯作者: 于文清,女,博士,教授,研究方向:植物保护;E-mail: wenqingyu09@163.com
  • 作者简介:刘文志,男,研究员,研究方向:生物防治;E-mail: liuwz19801005@sina.com
    第一联系人:

    贺丹为本文共同第一作者

  • 基金资助:
    国家自然科学基金项目(32360698);国家自然科学基金项目(32060633);黑龙江省自然科学基金项目(LH2021C087);高标准农田建设和黑龙江垦区社会公益性事务专项(KJZX202204-11)

Paenibacillus polymyxa New Strain X-11 and Its Growth-promoting Effects on Tomato and Rice

LIU Wen-zhi1,2(), HE Dan3, LI Peng3, FU Ying-lin1,2, ZHANG Yi-xin1,2, WEN Hua-jie1,2, YU Wen-qing1,2,3()   

  1. 1. College of Life Science, Shangrao Normal University, Shangrao 334001
    2. Research Center for Eco-Environmental Sciences and Green Development of Shangrao Normal University, Key Laboratory for Regional Plants Conservation and Ecological Restoration of Northeast Jiangxi, Shangrao 334001
    3. Heilongjiang Academy of Agricultural Reclamation Sciences, Harbin 150038
  • Received:2024-03-16 Published:2024-09-26 Online:2024-08-01

摘要:

【目的】从小麦(Triticum aestivum L)根际筛选到了一株细菌菌株(编号X-11),为该菌株在植物促生上应用提供依据。【方法】结合形态特征、生理生化特性、16S rDNA序列及基因组测序对其进行了鉴定,并测定其对番茄(Solanum lycopersicum)和水稻(Oryza sativa)的促生效应。【结果】该菌株菌落圆形、半透明、凸起、黏稠;菌体杆状,形成芽胞,革兰氏阴性;具有固氮,还原硝酸盐,产吲哚、分泌铁载体及分解有机磷的功能。基于16S rDNA序列比对将X-11菌株归类为多粘类芽胞杆菌种群,基于非冗余蛋白数据库的基因比对表明其与最近缘菌株基因相似率55.7%,证明其为一个新菌株。X-11菌液浸种显著增加了番茄发芽率和胚根伸长度,灌根(R)及灌根结合叶面喷施(R+L)显著提高了番茄叶片中过氧化物酶(POD)活性,R+L处理使超氧化物歧化酶(SOD)活性提高了34.58%。水稻1叶1心期施用X-11菌液,根长增加了6.8%;立针期或1叶1心期施用X-11菌液,使秧苗SOD活性分别提高了90.4%和51.8%。【结论】X-11被鉴定为多粘类芽胞杆菌新菌株,是多种功能的植物根际促生菌,在植物促生方面具有开发应用潜力。

关键词: 多粘类芽胞杆菌, 植物根际促生菌, 番茄, 水稻

Abstract:

【Objective】A plant-growth-promoting rhizobacterium strain(named X-11)was screened from rhizosphere soil of wheat(Triticum aestivum L). Which may provide a basis for the application of the strain in plant growth-promoting.【Method】Strain X-11 was identified by morphological characteristics, physiological and biochemical characteristics, 16S rDNA sequence and genome sequencing, and its effects on the growth and defense enzyme activities of tomato(Solanum lycopersicum)and rice(Oryza sativa)were measured. 【Result】The colonies of strain X-11 are round, swell, neat edge, translucent, and sticky. And the cells are rod-shaped, can form spores, gram negative reaction. And it has the functions of fixing nitrogen, reducing nitrate, producing indole and siderophore, degrading organic phosphorus. Strain X-11 was classified as Paenibacillus polymyxa group based on 16S rDNA sequence, while it was revealed to be a new strain with 55.7% genetic similarity to its closest relative strain through gene comparison in non-redundant database. Tomato(Solanum lycopersicum)seeds soaked with X-11 bacterial suspension increased germination rate and radicle length significantly. Moreover, peroxidase(POD)activity in the leaves significantly increased by X-11 bacterial suspension irrigating roots(R)and irrigating roots combined with spraying leaf surface(R+L). Meanwhile, the R+L treatment increased superoxide dismutase(SOD)activity by 34.58%. X-11 bacterial suspension increased the seedling root length by 6.8% when applied at one-leaf phase of rice(Oryza sativa). Additionally, the SOD activity of the seedlings increased by 90.4% and 51.8%, when the X-11 bacterial suspension was applied at vertical phase or one-leaf phase of rice. 【Conclusion】 Strain X-11 was identified as a new strain of P. polymyxa, which is the effective plant-growth promoting rhizobacterium with multiple functions and has potential for development and application in plant growth promotion.

Key words: Paenibacillus polymyxa, plant-growth promoting rhizobacterium, tomato, rice